%0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Juhel, J. B. %A Vigliola, Laurent %A Mouillot, D. %A Kulbicki, Michel %A Letessier, T. B. %A Meeuwig, J. J. %A Wantiez, L. %T Reef accessibility impairs the protection of sharks %D 2018 %L fdi:010072382 %G ENG %J Journal of Applied Ecology %@ 0021-8901 %K baited remote underwater video system ; baseline ; coral reef ; Elasmobranch ; human impact ; human proximity ; marine protected area ; reef ; shark ; underwater visual census %K NOUVELLE CALEDONIE ; PACIFIQUE %M ISI:000424881800021 %N 2 %P 673-683 %R 10.1111/1365-2664.13007 %U http://www.documentation.ird.fr/hor/fdi:010072382 %> http://www.documentation.ird.fr/intranet/publi/2018/03/010072382.pdf %V 55 %W Horizon (IRD) %X 1. Reef sharks are declining world-wide under ever-increasing fishing pressure, with potential consequences on ecosystem functioning. Marine protected areas (MPAs) are currently one of the management tools used to counteract the pervasive impacts of fishing. However, MPAs in which reef sharks are abundant tend to be located in remote and underexploited areas, preventing a fair assessment of management effectiveness beyond remoteness from human activities. 2. Here, we determine the conditions under which MPAs can effectively protect sharks along a wide gradient of reef accessibility, from the vicinity of a regional capital towards remote areas, using 385 records from baited remote underwater video systems and 2,790 underwater visual censuses performed in areas open to fishing and inside 15 MPAs across New Caledonia (South-Western Pacific). 3. We show that even one of the world's oldest (43 years), largest (172 km(2)) and most restrictive (no-entry) MPA (Merlet reserve) on coral reefs has between 17.3% and 45.3% fewer shark species and between 37.2% and 79.8% fewer shark abundance than remote areas in a context where sharks are not historically exploited. 4. On coral reefs situated at less than 1 hr of travel time from humans, shark populations are so low in abundance (less than 0.05 individuals per 1,000 m(2)) that their functional roles are severely limited. 5. Synthesis and applications. Remote areas are the last sanctuaries for reef sharks, providing a new baseline from which to evaluate human impacts on the species. However, there is no equivalent close to human activities even in large, old and strongly restrictive marine protected areas. As such sharks deserve strong protection efforts. The large, no-entry marine protected areas, close to humans, offer limited benefits for reef shark populations, but provide more realistic conservation targets for managers of human-dominated reefs. The exclusion of human activities on a sufficiently large area is key to protect reef shark populations. However, this strategy remains difficult to apply in many countries critically depending on reef resources for food security or livelihood. %$ 036 ; 034 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Ruppert, J. L. W. %A Vigliola, Laurent %A Kulbicki, Michel %A Labrosse, P. %A Fortin, M. J. %A Meekan, M. G. %T Human activities as a driver of spatial variation in the trophic structure of fish communities on Pacific coral reefs %D 2018 %L fdi:010072431 %G ENG %J Global Change Biology %@ 1354-1013 %K biogeography ; habitat ; multiscale analysis ; socioeconomic ; spatial food ; webs ; structural equation models %K PACIFIQUE %M ISI:000426506100006 %N 1 %P E67-E79 %R 10.1111/gcb.13882 %U http://www.documentation.ird.fr/hor/fdi:010072431 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers18-03/010072431.pdf %V 24 %W Horizon (IRD) %X Anthropogenic activities such as land-use change, pollution and fishing impact the trophic structure of coral reef fishes, which can influence ecosystem health and function. Although these impacts may be ubiquitous, they are not consistent across the tropical Pacific Ocean. Using an extensive database of fish biomass sampled using underwater visual transects on coral reefs, we modelled the impact of human activities on food webs at Pacific-wide and regional (1,000s-10,000s km) scales. We found significantly lower biomass of sharks and carnivores, where there were higher densities of human populations (hereafter referred to as human activity); however, these patterns were not spatially consistent as there were significant differences in the trophic structures of fishes among biogeographic regions. Additionally, we found significant changes in the benthic structure of reef environments, notably a decline in coral cover where there was more human activity. Direct human impacts were the strongest in the upper part of the food web, where we found that in a majority of the Pacific, the biomass of reef sharks and carnivores were significantly and negatively associated with human activity. Finally, although human-induced stressors varied in strength and significance throughout the coral reef food web across the Pacific, socioeconomic variables explained more variation in reef fish trophic structure than habitat variables in a majority of the biogeographic regions. Notably, economic development (measured as GDP per capita) did not guarantee healthy reef ecosystems (high coral cover and greater fish biomass). Our results indicate that human activities are significantly shaping patterns of trophic structure of reef fishes in a spatially nonuniform manner across the Pacific Ocean, by altering processes that organize communities in both "top-down" (fishing of predators) and "bottomup" (degradation of benthic communities) contexts. %$ 036 ; 040 ; 020 ; 082 ; 098 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Bakker, J. %A Wangensteen, O. S. %A Chapman, D. D. %A Boussarie, G. %A Buddo, D. %A Guttridge, T. L. %A Hertler, H. %A Mouillot, D. %A Vigliola, Laurent %A Mariani, S. %T Environmental DNA reveals tropical shark diversity in contrasting levels of anthropogenic impact %D 2017 %L fdi:010071877 %G ENG %J Scientific Reports - Nature %@ 2045-2322 %K CARAIBE MER ; PACIFIQUE ; MER DE CORAIL %M ISI:000417025400067 %P art. 16886 [11 p.] %R 10.1038/s41598-017-17150-2 %U http://www.documentation.ird.fr/hor/fdi:010071877 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-12/010071877.pdf %V 7 %W Horizon (IRD) %X Sharks are charismatic predators that play a key role in most marine food webs. Their demonstrated vulnerability to exploitation has recently turned them into flagship species in ocean conservation. Yet, the assessment and monitoring of the distribution and abundance of such mobile species in marine environments remain challenging, often invasive and resource-intensive. Here we pilot a novel, rapid and non-invasive environmental DNA (eDNA) metabarcoding approach specifically targeted to infer shark presence, diversity and eDNA read abundance in tropical habitats. We identified at least 21 shark species, from both Caribbean and Pacific Coral Sea water samples, whose geographical patterns of diversity and read abundance coincide with geographical differences in levels of anthropogenic pressure and conservation effort. We demonstrate that eDNA metabarcoding can be effectively employed to study shark diversity. Further developments in this field have the potential to drastically enhance our ability to assess and monitor elusive oceanic predators, and lead to improved conservation strategies. %$ 036 ; 034 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Kaplan, David %A Cuif, M. %A Fauvelot, Cécile %A Vigliola, Laurent %A Nguyen-Huu, Tri %A Tiavouane, J. %A Lett, Christophe %T Uncertainty in empirical estimates of marine larval connectivity %D 2017 %L fdi:010070836 %G ENG %J ICES Journal of Marine Science %@ 1054-3139 %K connectivity ; larval dispersal ; parentage analysis ; self-recruitment ; transgenerational marking %M ISI:000406598500023 %N 6 %P 1723-1734 %R 10.1093/icesjms/fsw182 %U http://www.documentation.ird.fr/hor/fdi:010070836 %> http://www.documentation.ird.fr/intranet/publi/2017/08/010070836.pdf %V 74 %W Horizon (IRD) %X Despite major advances in our capacity to measure marine larval connectivity (i.e. the pattern of transport of marine larvae from spawning to settlement sites) and the importance of these measurements for ecological and management questions, uncertainty in experimental estimates of marine larval connectivity has been given little attention. We review potential uncertainty sources in empirical larval connectivity studies and develop Bayesian statistical methods for estimating these uncertainties based on standard techniques in the mark-recapture and genetics literature. These methods are implemented in an existing R package for working with connectivity data, ConnMatTools, and applied to a number of published connectivity estimates. We find that the small sample size of collected settlers at destination sites is a dominant source of uncertainty in connectivity estimates in many published results. For example, widths of 95% CIs for relative connectivity, the value of which is necessarily between 0 and 1, exceeded 0.5 for many published connectivity results, complicating using individual results to conclude that marine populations are relatively closed or open. This "small sample size" uncertainty is significant even for studies with near-exhaustive sampling of spawners and settlers. Though largely ignored in the literature, the magnitude of this uncertainty is straightforward to assess. Better accountability of this and other uncertainties is needed in the future so that marine larval connectivity studies can fulfill their promises of providing important ecological insights and informing management questions (e.g. related to marine protected area network design, and stock structure of exploited organisms). In addition to using the statistical methods developed here, future studies should consistently evaluate and report a small number of critical factors, such as the exhaustivity of spawner and settler sampling, and the mating structure of target species in genetic studies. %$ 036 ; 034 ; 020 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Robinson, J. P. W. %A Williams, I. D. %A Edwards, A. M. %A McPherson, J. %A Yeager, L. %A Vigliola, Laurent %A Brainard, R. E. %A Baum, J. K. %T Fishing degrades size structure of coral reef fish communities %D 2017 %L fdi:010069326 %G ENG %J Global Change Biology %@ 1354-1013 %K body size ; community structure ; coral reef fish ; exploitation ; fisheries ; macroecology ; overfishing ; size spectra ; size-based ; approaches %M ISI:000396829300006 %N 3 %P 1009-1022 %R 10.1111/gcb.13482 %U http://www.documentation.ird.fr/hor/fdi:010069326 %> http://www.documentation.ird.fr/intranet/publi/2017/04/010069326.pdf %V 23 %W Horizon (IRD) %X Fishing pressure on coral reef ecosystems has been frequently linked to reductions of large fishes and reef fish biomass. Associated impacts on overall community structure are, however, less clear. In size-structured aquatic ecosystems, fishing impacts are commonly quantified using size spectra, which describe the distribution of individual body sizes within a community. We examined the size spectra and biomass of coral reef fish communities at 38 US-affiliated Pacific islands that ranged in human presence from near pristine to human population centers. Size spectra 'steepened' steadily with increasing human population and proximity to market due to a reduction in the relative biomass of large fishes and an increase in the dominance of small fishes. Reef fish biomass was substantially lower on inhabited islands than uninhabited ones, even at inhabited islands with the lowest levels of human presence. We found that on populated islands size spectra exponents decreased (analogous to size spectra steepening) linearly with declining biomass, whereas on uninhabited islands there was no relationship. Size spectra were steeper in regions of low sea surface temperature but were insensitive to variation in other environmental and geomorphic covariates. In contrast, reef fish biomass was highly sensitive to oceanographic conditions, being influenced by both oceanic productivity and sea surface temperature. Our results suggest that community size structure may be a more robust indicator than fish biomass to increasing human presence and that size spectra are reliable indicators of exploitation impacts across regions of different fish community compositions, environmental drivers, and fisheries types. Size-based approaches that link directly to functional properties of fish communities, and are relatively insensitive to abiotic variation across biogeographic regions, offer great potential for developing our understanding of fishing impacts in coral reef ecosystems. %$ 040 ; 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Trape, S. %A Durand, Jean-Dominique %A Vigliola, Laurent %A Panfili, Jacques %T Recruitment success and growth variability of mugilids in a West African estuary impacted by climate change %D 2017 %L fdi:010071389 %G ENG %J Estuarine Coastal and Shelf Science %@ 0272-7714 %K Inverse estuary ; Hypersaline conditions ; Mugilidae ; Juveniles ; Habitat quality ; West Africa %K AFRIQUE DE L'OUEST ; SENEGAL ; SALOUM ESTUAIRE %M ISI:000415781000006 %N A %P 53-62 %R 10.1016/j.ecss.2017.08.037 %U http://www.documentation.ird.fr/hor/fdi:010071389 %> http://www.documentation.ird.fr/intranet/publi/2017/12/010071389.pdf %V 198 %W Horizon (IRD) %X With the persistence of a drought since the late 1960s, some West African estuaries became permanently reversed in term of salinity gradient and hypersaline waters are present in their upstream part (salinity >60). To understand the mechanisms regulating fish recruitment intensity in these estuaries and evaluate the consequences of freshwater shortages on juvenile habitat quality, a growth study was conducted in the Saloum hypersaline estuary (Senegal). The Mugilidae fish family, highly representative of estuarine environments, was targeted and several species sampled (Chelon dumerili, Mugil bananensis and M. cf. curema sp. M). Juveniles were sampled monthly all the year round in three areas of the estuary exhibiting strongly contrasted habitat conditions. Otolith sections were used to estimate the ages, reconstruct growth trajectories, estimate the duration of the oceanic larval phase, and evaluate juvenile growth variability along the salinity gradient. Analyses revealed that the temporal recruitment variability of C. dumerili, with 2 annual cohorts, was not mainly induced by growth-selection mechanisms, but probably more by predation pressures. Juveniles exhibited significantly faster growth rates in the lower salinity suggesting that benthic food availability was a strong factor controlling habitat quality of early juveniles. Salinity had also a clear impact when reducing the growth in hypersaline conditions and/or selecting slower growing individuals. Moderate freshwater inputs positively affected the nursery function of the estuary for mugilids by enhancing the productivity of the first trophic levels. In a long term, the global change could have an impact of the mugilid fishery and its management. %$ 040 ; 036 ; 021 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Cinner, J. E. %A Huchery, C. %A MacNeil, M. A. %A Graham, N. A. J. %A McClanahan, T. R. %A Maina, J. %A Maire, E. %A Kittinger, J. N. %A Hicks, C. C. %A Mora, C. %A Allison, E. H. %A D'Agata, S. %A Hoey, A. %A Feary, D. A. %A Crowder, L. %A Williams, I. D. %A Kulbicki, Michel %A Vigliola, Laurent %A Wantiez, L. %A Edgar, G. %A Stuart-Smith, R. D. %A Sandin, S. A. %A Green, A. L. %A Hardt, M. J. %A Beger, M. %A Friedlander, A. %A Campbell, S. J. %A Holmes, K. E. %A Wilson, S. K. %A Brokovich, E. %A Brooks, A. J. %A Cruz-Motta, J. J. %A Booth, D. J. %A Chabanet, Pascale %A Gough, C. %A Tupper, M. %A Ferse, S. C. A. %A Sumaila, U. R. %A Mouillot, D. %T Bright spots among the world's coral reefs %D 2016 %L fdi:010067710 %G ENG %J Nature %@ 0028-0836 %K MONDE ; ZONE TROPICALE %M ISI:000380344200039 %N 7612 %P 416-+ %R 10.1038/nature18607 %U http://www.documentation.ird.fr/hor/fdi:010067710 %> http://www.documentation.ird.fr/intranet/publi/2016/08/010067710.pdf %V 535 %W Horizon (IRD) %X Ongoing declines in the structure and function of the world's coral reefs(1,2) require novel approaches to sustain these ecosystems and the millions of people who depend on them(3). A presently unexplored approach that draws on theory and practice in human health and rural development(4,5) is to systematically identify and learn from the 'outliers'-places where ecosystems are substantially better ('bright spots') or worse ('dark spots') than expected, given the environmental conditions and socioeconomic drivers they are exposed to. Here we compile data from more than 2,500 reefs worldwide and develop a Bayesian hierarchical model to generate expectations of how standing stocks of reef fish biomass are related to 18 socioeconomic drivers and environmental conditions. We identify 15 bright spots and 35 dark spots among our global survey of coral reefs, defined as sites that have biomass levels more than two standard deviations from expectations. Importantly, bright spots are not simply comprised of remote areas with low fishing pressure; they include localities where human populations and use of ecosystem resources is high, potentially providing insights into how communities have successfully confronted strong drivers of change. Conversely, dark spots are not necessarily the sites with the lowest absolute biomass and even include some remote, uninhabited locations often considered near pristine(6). We surveyed local experts about social, institutional, and environmental conditions at these sites to reveal that bright spots are characterized by strong sociocultural institutions such as customary taboos and marine tenure, high levels of local engagement in management, high dependence on marine resources, and beneficial environmental conditions such as deep-water refuges. Alternatively, dark spots are characterized by intensive capture and storage technology and a recent history of environmental shocks. Our results suggest that investments in strengthening fisheries governance, particularly aspects such as participation and property rights, could facilitate innovative conservation actions that help communities defy expectations of global reef degradation. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A D'Agata, S. %A Mouillot, D. %A Wantiez, L. %A Friedlander, A. M. %A Kulbicki, Michel %A Vigliola, Laurent %T Marine reserves lag behind wilderness in the conservation of key functional roles %D 2016 %L fdi:010067656 %G ENG %J Nature Communications %@ 2041-1723 %K NOUVELLE CALEDONIE ; PACIFIQUE %M ISI:000379109500001 %P art. 12000 [10 p.] %R 10.1038/ncomms12000 %U http://www.documentation.ird.fr/hor/fdi:010067656 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers16-08/010067656.pdf %V 7 %W Horizon (IRD) %X Although marine reserves represent one of the most effective management responses to human impacts, their capacity to sustain the same diversity of species, functional roles and biomass of reef fishes as wilderness areas remains questionable, in particular in regions with deep and long-lasting human footprints. Here we show that fish functional diversity and biomass of top predators are significantly higher on coral reefs located at more than 20 h travel time from the main market compared with even the oldest (38 years old), largest (17,500 ha) and most restrictive (no entry) marine reserve in New Caledonia (South-Western Pacific). We further demonstrate that wilderness areas support unique ecological values with no equivalency as one gets closer to humans, even in large and well-managed marine reserves. Wilderness areas may therefore serve as benchmarks for management effectiveness and act as the last refuges for the most vulnerable functional roles. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A D'Agata, S. %A Vigliola, Laurent %A Graham, N. A. J. %A Wantiez, L. %A Parravicini, Valeriano %A Villeger, S. %A Gerard, M. T. %A Frolla, P. %A Friedlander, A. M. %A Kulbicki, Michel %A Mouillot, D. %T Unexpected high vulnerability of functions in wilderness areas : evidence from coral reef fishes %D 2016 %L fdi:010068792 %G ENG %J Proceedings of the Royal Society B. Biological Sciences %@ 0962-8452 %K coral reef fish ; wilderness areas ; redundancy ; baseline functional ; vulnerability %K PACIFIQUE ; OCEAN INDIEN ; CHAGOS ; NOUVELLE CALEDONIE ; POLYNESIE FRANCAISE %M ISI:000390404200002 %N 1844 %P art. 20160128 [10 p.] %R 10.1098/rspb.2016.0128 %U http://www.documentation.ird.fr/hor/fdi:010068792 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-03/010068792.pdf %V 283 %W Horizon (IRD) %X High species richness is thought to support the delivery of multiple ecosystem functions and services under changing environments. Yet, some species might performunique functional roles while others are redundant. Thus, the benefits of high species richness in maintaining ecosystem functioning are uncertain if functions have little redundancy, potentially leading to high vulnerability of functions. We studied the natural propensity of assemblages to be functionally buffered against loss prior to fishing activities, using functional trait combinations, in coral reef fish assemblages across unfished wilderness areas of the Indo-Pacific: Chagos Archipelago, New Caledonia and French Polynesia. Fish functional diversity in these wilderness areas is highly vulnerable to fishing, explained by species-and abundance-based redundancy packed into a small combination of traits, leaving most other trait combinations (60%) sensitive to fishing, with no redundancy. Functional vulnerability peaks for mobile and sedentary top predators, and large species in general. Functional vulnerability decreases for certain functional entities in New Caledonia, where overall functional redundancy was higher. Uncovering these baseline patterns of functional vulnerability can offer early warning signals of the damaging effects from fishing, and may serve as baselines to guide precautionary and even proactive conservation actions. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Maire, E. %A Cinner, J. %A Velez, L. %A Huchery, C. %A Mora, C. %A Dagata, S. %A Vigliola, Laurent %A Wantiez, L. %A Kulbicki, Michel %A Mouillot, D. %T How accessible are coral reefs to people ? A global assessment based on travel time %D 2016 %L fdi:010066698 %G ENG %J Ecology Letters %@ 1461-023X %K Accessibility ; coral reefs ; marine protected areas ; social-ecological ; travel time %K NOUVELLE CALEDONIE %M ISI:000372654800001 %N 4 %P 351-360 %R 10.1111/ele.12577 %U http://www.documentation.ird.fr/hor/fdi:010066698 %> http://www.documentation.ird.fr/intranet/publi/2016/04/010066698.pdf %V 19 %W Horizon (IRD) %X The depletion of natural resources has become a major issue in many parts of the world, with the most accessible resources being most at risk. In the terrestrial realm, resource depletion has classically been related to accessibility through road networks. In contrast, in the marine realm, the impact on living resources is often framed into the Malthusian theory of human density around ecosystems. Here, we develop a new framework to estimate the accessibility of global coral reefs using potential travel time from the nearest human settlement or market. We show that 58% of coral reefs are located <30min from the nearest human settlement. We use a case study from New Caledonia to demonstrate that travel time from the market is a strong predictor of fish biomass on coral reefs. We also highlight a relative deficit of protection on coral reef areas near people, with disproportional protection on reefs far from people. This suggests that conservation efforts are targeting low-conflict reefs or places that may already be receiving de facto protection due to their isolation. Our global assessment of accessibility in the marine realm is a critical step to better understand the interplay between humans and resources. %$ 082 ; 036 ; 095 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Mallet, D. %A Vigliola, Laurent %A Wantiez, L. %A Pelletier, D. %T Diurnal temporal patterns of the diversity and the abundance of reef fishes in a branching coral patch in New Caledonia %D 2016 %L fdi:010068307 %G ENG %J Austral Ecology %@ 1442-9985 %K coral reef fish ; high-frequency sampling ; patterns ; temporal variation ; underwater video %K NOUVELLE CALEDONIE ; PACIFIQUE SUD %M ISI:000386750500002 %N 7 %P 733-744 %R 10.1111/aec.12360 %U http://www.documentation.ird.fr/hor/fdi:010068307 %> http://www.documentation.ird.fr/intranet/publi/2016/11/010068307.pdf %V 41 %W Horizon (IRD) %X Small-scale spatial and temporal variability in animal abundance is an intrinsic characteristic of marine ecosystems but remains largely unknown for most animals, including coral reef fishes. In this study, we used a remote autonomous unbaited video system and recorded reef fish assemblages during daylight hours, 10 times a day for 34 consecutive days in a branching coral patch of the lagoon of New Caledonia. In total, 50031 fish observations belonging to 114 taxa, 66 genera and 31 families were recorded in 256 recorded videos. Carnivores and herbivore-detritus feeders dominated the trophic structure. We found significant variations in the composition of fish assemblages between times of day. Taxa richness and fish abundance were greater in the early morning and in the late afternoon than during the day. Fourteen taxa displayed well-defined temporal patterns in abundance with one taxon influenced by time of day, six influenced by tidal state and seven influenced by both time of day and tidal state. None of these 14 taxa were piscivores, 10 were herbivore-detritus feeders, three were carnivores and one was plankton feeder. Our results suggest a diel migration from feeding grounds to shelter areas and highlight the importance of taking into account small-scale temporal variability in animal diversity and abundance when studying connectivity between habitats and monitoring communities. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Mellin, C. %A Mouillot, D. %A Kulbicki, Michel %A McClanahan, T. R. %A Vigliola, Laurent %A Bradshaw, C. J. A. %A Brainard, R. E. %A Chabanet, Pascale %A Edgar, G. J. %A Fordham, D. A. %A Friedlander, A. M. %A Parravicini, V. %A Sequeira, A. M. M. %A Stuart-Smith, R. D. %A Wantiez, L. %A Caley, M. J. %T Humans and seasonal climate variability threaten large-bodied coral reef fish with small ranges %D 2016 %L fdi:010066242 %G ENG %J Nature Communications %@ 2041-1723 %K PACIFIQUE ; OCEAN INDIEN %M ISI:000371012100003 %P art. 10491 [9 p. ] %R 10.1038/ncomms10491 %U http://www.documentation.ird.fr/hor/fdi:010066242 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers16-03/010066242.pdf %V 7 %W Horizon (IRD) %X Coral reefs are among the most species-rich and threatened ecosystems on Earth, yet the extent to which human stressors determine species occurrences, compared with biogeography or environmental conditions, remains largely unknown. With ever-increasing human-mediated disturbances on these ecosystems, an important question is not only how many species can inhabit local communities, but also which biological traits determine species that can persist (or not) above particular disturbance thresholds. Here we show that human pressure and seasonal climate variability are disproportionately and negatively associated with the occurrence of large-bodied and geographically small-ranging fishes within local coral reef communities. These species are 67% less likely to occur where human impact and temperature seasonality exceed critical thresholds, such as in the marine biodiversity hotspot: the Coral Triangle. Our results identify the most sensitive species and critical thresholds of human and climatic stressors, providing opportunity for targeted conservation intervention to prevent local extinctions. %$ 036 ; 020 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Cuif, M. %A Kaplan, David %A Fauvelot, Cécile %A Lett, Christophe %A Vigliola, Laurent %T Monthly variability of self-recruitment for a coral reef damselfish %D 2015 %L fdi:010064893 %G ENG %J Coral Reefs %@ 0722-4028 %K Dascyllus aruanus ; Transgenerational marking ; Otolith ; Self-recruitment ; Larval dispersal ; Connectivity %K NOUVELLE CALEDONIE %M ISI:000359161500006 %N 3 %P 759-770 %R 10.1007/s00338-015-1300-4 %U http://www.documentation.ird.fr/hor/fdi:010064893 %> http://www.documentation.ird.fr/intranet/publi/2015/09/010064893.pdf %V 34 %W Horizon (IRD) %X Understanding the dynamics of marine populations is critical to managing marine systems effectively and requires information on patterns of population dispersal and connectivity that are still poorly known. We used transgenerational marking to study larval dispersal of the humbug damselfish, Dascyllus aruanus, in the patchy reef seascape of the southwest Lagoon of New Caledonia (SWL), southwest tropical pacific. The adult population of a patch reef located in the central part of the SWL was injected repeatedly with an enriched Ba-137 solution to ensure mass production of marked larvae over two successive reproductive seasons. Multiple cohorts of newly settled larvae were sampled, and their otolith core was analyzed by laser ablation inductively coupled plasma mass spectrometry to assess the seasonal and interannual variability of self-recruitment at the central reef. Connectivity between this reef and ten neighboring reefs was also estimated. Analysis of > 1200 settlers indicated that self-recruitment varied significantly between months (ranging from 0 to 68 %) and years (21 % in 2011 and 0 % in 2012). However, variable self-recruitment did not always correspond to variable numbers of self-recruits. Therefore, whereas self-recruitment is undoubtedly a good indication of the degree of population openness, it may not indicate local population persistence. Finally, being the first self-recruitment study to include such a large number of settlers, our study reveals that the threshold used to determine marked individuals significantly affects perceived self-recruitment and connectivity rates and, therefore, must be carefully chosen. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Juhel, Jean-Baptiste %A Wantiez, L. %A Mouillot, D. %A Mailau, S. %A Vigliola, Laurent %T Occurrence of sub-adult tiger sharks (Galeocerdo cuvier) in a small and very remote atoll lagoon %D 2015 %L fdi:010064689 %G ENG %J Marine Biodiversity %@ 1867-1616 %K MER DE CORAIL ; NORTH MINERVA %M ISI:000355753700007 %N 2 %P 151-152 %R 10.1007/s12526-014-0246-z %U http://www.documentation.ird.fr/hor/fdi:010064689 %> http://www.documentation.ird.fr/intranet/publi/2015/07/010064689.pdf %V 45 %W Horizon (IRD) %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Letessier, T. B. %A Juhel, Jean-Baptiste %A Vigliola, Laurent %A Meeuwig, J. J. %T Low-cost small action cameras in stereo generates accurate underwater measurements of fish %D 2015 %L fdi:010064125 %G ENG %J Journal of Experimental Marine Biology and Ecology %@ 0022-0981 %K Body size ; Length ; Monitoring ; Stereo-photogrammetry ; Videography %M ISI:000352667500014 %P 120-126 %R 10.1016/j.jembe.2015.02.013 %U http://www.documentation.ird.fr/hor/fdi:010064125 %> http://www.documentation.ird.fr/intranet/publi/2015/05/010064125.pdf %V 466 %W Horizon (IRD) %X Small action cameras have received interest for use in underwater videography because of their low-cost, standardised housing, widespread availability and small size. Here, we assess the capacity of GoPro action cameras to provide accurate stereo-measurements of fish in comparison to the Sony handheld cameras that have traditionally been used for this purpose. Standardised stereo-GoPro and Sony systems were employed to capture measurements of known-length targets in a pool to explore the influence of the type of camera, distance to camera rig, angle to the optical axis and target speed on measurement accuracy. The capacity to estimate fish length in situ was also compared by measuring the same fish on a coral reef with two baited remote underwater video systems, each fitted with both a GoPro and a Sony camera system. Pool trials indicated that the GoPros were generally less accurate than the Sonys. Accuracy decreased with increased angles and distance for both systems but remained reasonably low (<7.5%) at 5 m distance and 25 angle for GoPros. Speed of target movement did not result in any consistent decrease in accuracy. In situ measurements revealed a strong correlation (R-2 = 0.94) between Sony and GoPro length measurements of the same individual fish, with a slope not different from 1 and an intercept not different from 0, suggesting that GoPro measurement errors do not result in a consistent bias at the level of individual fish. Moreover, the investigation of kernel density functions of the length distribution of the entire fish assemblage indicated that difference in measurement accuracy becomes negligible for purposes of comparing population size structure. We suggest a measurement protocol for the use of GoPro stereo-camera systems that improves accuracy, where distance to target is limited to 5 m and angle to optical axis is restricted to 25 degrees. For distances up to 7 m, angles should be restricted to 15 degrees. This protocol supports the use of small action cameras such as the GoPro system, providing reductions in cost and increases in effective sampling efforts, compared with traditional rigs based on relatively expensive handheld cameras. %$ 036 ; 020 ; 126 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Panfili, Jacques %A Darnaude, A. M. %A Vigliola, Laurent %A Jacquart, A. %A Labonne, Maylis %A Gilles, Sylvain %T Experimental evidence of complex relationships between the ambient salinity and the strontium signature of fish otoliths %D 2015 %L fdi:010064182 %G ENG %J Journal of Experimental Marine Biology and Ecology %@ 0022-0981 %K Euryhaline tilapia ; Otolith microchemistry ; Salinity ; Sarotherodon ; melanotheron heudelotii ; Strontium ; Validation %M ISI:000353743600009 %P 65-70 %R 10.1016/j.jembe.2015.03.007 %U http://www.documentation.ird.fr/hor/fdi:010064182 %> http://www.documentation.ird.fr/intranet/publi/2015/05/010064182.pdf %V 467 %W Horizon (IRD) %X The otolith strontium:calcium ratio (Sr:Ca) has been widely used to assess the connectivity between fish populations in ocean, estuarine and freshwater environments as the concentration of Sr in the otoliths is strongly correlated with water salinity. This correlation was tested experimentally in hypersaline conditions by submitting the extremely euryhaline tilapia species Sarotherodon melanotheron heudelotii (Cichlidae), found throughout West African continental waters and commonly used as an aquaculture species, to a strong salinity gradient (15-106). Experimental and control individuals were reared from birth in a closed system at a constant salinity of 10 and injected with oxytetracycline (OTC) to mark the otoliths at the beginning of the experiment. Randomly selected control fish were maintained for 75 days at salinities of 10-20. The remaining experimental fish were acclimated to a salinity above 100 which was reduced by 10 each week to a salinity of 20. The salinity and temperature of the water were recorded every day and the Sr concentrations in the water were measured weekly by solution-based ICP-MS. The fish from the control and experimental groups were sampled weekly and otolith transverse sections were prepared for Sr:Ca measurements by laser ablation ICP-MS. No significant difference in the otolith growth rates after OTC marking was found between the control and experimental groups (ANCOVA, p = 0.63), showing that the experimental design did not affect fish growth. The Sr concentration in the water was closely related to ambient salinity (positive linear regression, R-2 = 0.96). For most of the fish tested (similar to 80%), the relationship between otolith Sr:Ca and salinity was positive but nonlinear (power law, R-2 = 0.77 on log-log plot). However, about 20% of individuals from both the control and the experimental groups showed consistently low Sr:Ca ratios irrespective of the salinity, suggesting that the Sr incorporation into the otoliths in these fish was strongly regulated. This shows that there is high variability between individuals in the regulation of Sr incorporation by a euryhaline species and indicates that otolith datasets for ecological applications should be interpreted with caution. %$ 036 ; 034 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Cuif, M. %A Kaplan, David %A Lefèvre, Jérôme %A Faure, V.M. %A Caillaud, M. %A Verley, Philippe %A Vigliola, Laurent %A Lett, Christophe %T Wind-induced variability in larval retention in a coral reef system : a biophysical modelling study in the South-West Lagoon of New Caledonia %D 2014 %L fdi:010061913 %G ENG %J Progress in Oceanography %@ 0079-6611 %K NOUVELLE CALEDONIE %M ISI:000334006100008 %P 105-115 %R 10.1016/j.pocean.2013.12.006 %U http://www.documentation.ird.fr/hor/fdi:010061913 %> http://www.documentation.ird.fr/intranet/publi/2014/05/010061913.pdf %V 122 %W Horizon (IRD) %X In the present work, a biophysical dispersal model is used to understand the role of the physical environment in determining reef fish larval dispersal patterns in the South-West Lagoon of New Caledonia. We focus on a reef fish species, the humbug damselfish Dascyllus aruanus, to investigate seasonal variability of simulated larval retention at the scale of a reef patch and at the scale of the lagoon, and to explore links between larval retention and wind variability. The model shows that retention exhibits considerable temporal variability and periodically reaches values much larger than anticipated. Non-zero larval settlement occurs over a large part of the lagoon. Nevertheless, settlement values decrease quickly away from the natal reef and mean dispersal distances are of order 25-35 km. Cross-correlation analyses indicate that weather conditions characterized by strong south east trade winds lead to low retention rates at both local (reef) and regional (lagoon) scales. By contrast, subtropical weather conditions characterized by weak winds result in high retention rates. These results suggest that large-scale weather regimes can be used as proxies for larval retention of the humbug damselfish in the South-West Lagoon of New Caledonia. Nevertheless, relatively small mean dispersal distances suggest that metapopulation dynamics occur on relatively small spatial scales. %$ 036 ; 020 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Cuif, M. %A Keller, F. %A Chateau, O. %A Kaplan, David %A Labonne, Maylis %A Lett, Christophe %A Vigliola, Laurent %T Evaluation of transgenerational isotope labeling of embryonic otoliths in a coral reef damselfish with single and repeated injections of enriched (137)Barium %D 2014 %L fdi:010062345 %G ENG %J Journal of Experimental Marine Biology and Ecology %@ 0022-0981 %K Barium isotopes ; Connectivity ; Dascyllus aruanus ; LA-ICP-MS ; Otolith ; microchemistry ; Transgenerational marking %K NOUVELLE CALEDONIE %M ISI:000339128500019 %P 151-159 %R 10.1016/j.jembe.2014.05.019 %U http://www.documentation.ird.fr/hor/fdi:010062345 %> http://www.documentation.ird.fr/intranet/publi/2014/08/010062345.pdf %V 459 %W Horizon (IRD) %X Quantifying the larval dispersal component of population connectivity is extremely challenging due to the many difficulties associated with directly observing larvae in their marine environment. Transgenerational isotope labeling is a recent empirical technique that addresses this challenge. It relies on the transmission of an artificially enriched stable isotope (e.g., Ba-137) from gravid females to the embryonic otoliths of their offspring, allowing for mass permanent marking of larvae. Before implementing transgenerational isotope labeling in the wild, it is essential to investigate the transmission longevity of the mark from females to larvae and to assess the potential negative effects on females and their offspring. We injected females of the Humbug damselfish, Dascyllus aruanus, with an enriched Ba-137 solution and reared the resulting progeny to test the marking success and the transmission longevity of the mark, as well as determine potential effects of transgenerational isotope labeling on spawning frequency and size of 1-day eggs and 2-day larvae. Three different single-injection dosages (0.5, 1 and 5 mu g of Ba-137 g(-1) fish weight) were tested, as well as monthly repeated injections of the lowest dosage over a whole reproductive season. We implemented a new method that allows extracting otoliths of newly hatched larvae and analyzing them using laser ablation coupled plasma mass spectrometry (ICP-MS). We showed that for D. aruanus, injection with a low dose (0.5 mu g Ba-137 g(-1), fish weight) produced consistently significantly marked larvae with a half-life for successful enriched Ba mark transmission of approximately 1 month, and that monthly repeated injections of this dose did not negatively impact spawning success or condition of eggs and larvae. Monthly repeated injections of enriched Ba isotope injections at 0.5 mu g Ba-137 g(-1) fish weight will therefore present an effective means of mass marking D. aruanus larvae throughout an entire reproductive season. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A D'Agata, S. %A Mouillot, D. %A Kulbicki, Michel %A Andréfouët, Serge %A Bellwood, D. R. %A Cinner, J. E. %A Cowman, P. F. %A Kronen, M. %A Pinca, S. %A Vigliola, Laurent %T Human-mediated loss of phylogenetic and functional diversity in coral reef fishes %D 2014 %L fdi:010061627 %G ENG %J Current Biology %@ 0960-9822 %K PACIFIQUE %M ISI:000332412400024 %N 5 %P 555-560 %R 10.1016/j.cub.2014.01.049 %U http://www.documentation.ird.fr/hor/fdi:010061627 %> http://www.documentation.ird.fr/intranet/publi/depot/2014-05-07/010061627.pdf %V 24 %W Horizon (IRD) %X Beyond the loss of species richness [1-3], human activities may also deplete the breadth of evolutionary history (phylogenetic diversity) and the diversity of roles (functional diversity) carried out by species within communities, two overlooked components of biodiversity. Both are, however, essential to sustain ecosystem functioning and the associated provision of ecosystem services, particularly under fluctuating environmental conditions [1-7]. We quantified the effect of human activities on the taxonomic, phylogenetic, and functional diversity of fish communities in coral reefs, while teasing apart the influence of biogeography and habitat along a gradient of human pressure across the Pacific Ocean. We detected nonlinear relationships with significant breaking points in the impact of human population density on phylogenetic and functional diversity of parrot-fishes, at 25 and 15 inhabitants/km(2), respectively, while parrot-fish species richness decreased linearly along the same population gradient. Over the whole range, species richness decreased by 11.7%, while phylogenetic and functional diversity dropped by 35.8% and 46.6%, respectively. Our results call for caution when using species richness as a benchmark for measuring the status of ecosystems since it appears to be less responsive to variation in human population densities than its phylogenetic and functional counterparts, potentially imperiling the functioning of coral reef ecosystems. %$ 036 ; 040 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Guillemot, Nicolas %A Chabanet, Pascale %A Kulbicki, Michel %A Vigliola, Laurent %A Léopold, Marc %A Jollit, I. %A Le Pape, O. %T Effects of fishing on fish assemblages in a coral reef ecosystem : from functional response to potential indicators %D 2014 %L fdi:010062255 %G ENG %J Ecological Indicators %@ 1470-160X %K Reef fish ; Coral reefs ; Fishing ; Spatio-temporal variations ; Indicators ; Monitoring %K NOUVELLE CALEDONIE %M ISI:000336952300022 %P 227-235 %R 10.1016/j.ecolind.2014.02.015 %U http://www.documentation.ird.fr/hor/fdi:010062255 %> http://www.documentation.ird.fr/intranet/publi/2014/07/010062255.pdf %V 43 %W Horizon (IRD) %X Many Pacific countries face socio-economic changes, resulting in an increase in fishing pressure on reef fish resources. In coral reef environments, examining the ecological effects of fishing on fish assemblages is generally hampered by the lack of data for both in situ assemblages and fishing activities, and by the difficulty to account for natural variations in assemblages. The responses of fish assemblages to moderate fishing pressure were investigated in two sites of New Caledonia (South Pacific). Habitat structures and fish assemblages were described through in situ multiyear underwater visual surveys to account for spatial and temporal variability. A recent quantification of fishing catches and efforts allowed defining spatial gradients of fishing pressure. Linear models were used to test fishing effects on species richness, density, biomass, length and trophic structure of the whole assemblage, large species, target species, and different ecotrophic guilds. A significant decrease in most metrics was detected when fishing pressure increased. The results obtained for all-species fish metrics were confirmed for target species, large species, carnivores and corallivores trophic guilds and large individuals. This functional modelling approach accounted for the natural variability of local coral reef systems and allowed detecting effects of fishing, although fishing pressure was low to moderate in the surveyed sites. Our results suggest that further modelling development, including control sites, would allow precautionary indicators and strategies to be defined for the monitoring and management of reef fish resources. %$ 040 ; 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Mallet, D. %A Wantiez, L. %A Lemouellic, S. %A Vigliola, Laurent %A Pelletier, D. %T Complementarity of rotating video and underwater visual census for assessing species richness, frequency and density of reef fish on coral reef slopes %D 2014 %L fdi:010061493 %G ENG %J Plos One %@ 1932-6203 %K NOUVELLE CALEDONIE %M ISI:000329460100049 %N 1 %P e84344 %R 10.1371/journal.pone.0084344 %U http://www.documentation.ird.fr/hor/fdi:010061493 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-08/010061493.pdf %V 9 %W Horizon (IRD) %X Estimating diversity and abundance of fish species is fundamental for understanding community structure and dynamics of coral reefs. When designing a sampling protocol, one crucial step is the choice of the most suitable sampling technique which is a compromise between the questions addressed, the available means and the precision required. The objective of this study is to compare the ability to sample reef fish communities at the same locations using two techniques based on the same stationary point count method: one using Underwater Visual Census (UVC) and the other rotating video (STAVIRO). UVC and STAVIRO observations were carried out on the exact same 26 points on the reef slope of an intermediate reef and the associated inner barrier reefs. STAVIRO systems were always deployed 30 min to 1 hour after UVC and set exactly at the same place. Our study shows that; (i) fish community observations by UVC and STAVIRO differed significantly; (ii) species richness and density of large species were not significantly different between techniques; (iii) species richness and density of small species were higher for UVC; (iv) density of fished species was higher for STAVIRO and (v) only UVC detected significant differences in fish assemblage structure across reef type at the spatial scale studied. We recommend that the two techniques should be used in a complementary way to survey a large area within a short period of time. UVC may census reef fish within complex habitats or in very shallow areas such as reef flat whereas STAVIRO would enable carrying out a large number of stations focused on large and diver-averse species, particularly in the areas not covered by UVC due to time and depth constraints. This methodology would considerably increase the spatial coverage and replication level of fish monitoring surveys. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Mouillot, D. %A Villeger, S. %A Parravicini, Valeriano %A Kulbicki, Michel %A Arias-Gonzalez, J. E. %A Bender, M. %A Chabanet, Pascale %A Floeter, S. R. %A Friedlander, A. %A Vigliola, Laurent %A Bellwood, D. R. %T Functional over-redundancy and high functional vulnerability in global fish faunas on tropical reefs %D 2014 %L fdi:010062559 %G ENG %J Proceedings of the National Academy of Sciences of the United States of America %@ 0027-8424 %K fish ecology ; coral reefs %K ZONE TROPICALE %M ISI:000341988200032 %N 38 %P 13757-13762 %R 10.1073/pnas.1317625111 %U http://www.documentation.ird.fr/hor/fdi:010062559 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-11/010062559.pdf %V 111 %W Horizon (IRD) %X When tropical systems lose species, they are often assumed to be buffered against declines in functional diversity by the ability of the species-rich biota to display high functional redundancy: i.e., a high number of species performing similar functions. We tested this hypothesis using a ninefold richness gradient in global fish faunas on tropical reefs encompassing 6,316 species distributed among 646 functional entities (FEs): i.e., unique combinations of functional traits. We found that the highest functional redundancy is located in the Central Indo-Pacific with a mean of 7.9 species per FE. However, this overall level of redundancy is disproportionately packed into few FEs, a pattern termed functional over-redundancy (FOR). For instance, the most speciose FE in the Central Indo-Pacific contains 222 species (out of 3,689) whereas 38% of FEs (180 out of 468) have no functional insurance with only one species. Surprisingly, the level of FOR is consistent across the six fish faunas, meaning that, whatever the richness, over a third of the species may still be in overrepresented FEs whereas more than one third of the FEs are left without insurance, these levels all being significantly higher than expected by chance. Thus, our study shows that, even in high-diversity systems, such as tropical reefs, functional diversity remains highly vulnerable to species loss. Although further investigations are needed to specifically address the influence of redundant vs. vulnerable FEs on ecosystem functioning, our results suggest that the promised benefits from tropical biodiversity may not be as strong as previously thought. %$ 036 ; 082 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Paillon, Christelle %A Wantiez, L. %A Kulbicki, Michel %A Labonne, Maylis %A Vigliola, Laurent %T Extent of mangrove nursery habitats determines the geographic distribution of a coral reef fish in a South-Pacific archipelago %D 2014 %L fdi:010062595 %G ENG %J Plos One %@ 1932-6203 %K NOUVELLE CALEDONIE %M ISI:000342687200055 %N 8 %P art. e105158 [10 p.] %R 10.1371/journal.pone.0105158 %U http://www.documentation.ird.fr/hor/fdi:010062595 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-08/010062595.pdf %V 9 %W Horizon (IRD) %X Understanding the drivers of species' geographic distribution has fundamental implications for the management of biodiversity. For coral reef fishes, mangroves have long been recognized as important nursery habitats sustaining biodiversity in the Western Atlantic but there is still debate about their role in the Indo-Pacific. Here, we combined LA-ICP-MS otolith microchemistry, underwater visual censuses (UVC) and mangrove cartography to estimate the importance of mangroves for the Indo-Pacific coral reef fish Lutjanus fulviflamma in the archipelago of New Caledonia. Otolith elemental compositions allowed high discrimination of mangroves and reefs with 83.8% and 98.7% correct classification, respectively. Reefs were characterized by higher concentrations of Rb and Sr and mangroves by higher concentrations of Ba, Cr, Mn and Sn. All adult L. fulviflamma collected on reefs presented a mangrove signature during their juvenile stage with 85% inhabiting mangrove for their entire juvenile life (about 1 year). The analysis of 2942 UVC revealed that the species was absent from isolated islands of the New Caledonian archipelago where mangroves were absent. Furthermore, strong positive correlations existed between the abundance of L. fulviflamma and the area of mangrove (r = 0.84 for occurrence, 0.93 for density and 0.89 for biomass). These results indicate that mangrove forest is an obligatory juvenile habitat for L. fulviflamma in New Caledonia and emphasize the potential importance of mangroves for Indo-Pacific coral reef fishes. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Parravicini, Valeriano %A Villeger, S. %A McClanahan, T. R. %A Arias-Gonzalez, J. E. %A Bellwood, D. R. %A Belmaker, J. %A Chabanet, Pascale %A Floeter, S. R. %A Friedlander, A. M. %A Guilhaumon, François %A Vigliola, Laurent %A Kulbicki, Michel %A Mouillot, D. %T Global mismatch between species richness and vulnerability of reef fish assemblages %D 2014 %L fdi:010062457 %G ENG %J Ecology Letters %@ 1461-023X %K Conservation ; macroecology ; risk assessment ; sensitivity ; vulnerability %K ZONE TROPICALE %M ISI:000340406200006 %N 9 %P 1101-1110 %R 10.1111/ele.12316 %U http://www.documentation.ird.fr/hor/fdi:010062457 %> http://www.documentation.ird.fr/intranet/publi/2014/09/010062457.pdf %V 17 %W Horizon (IRD) %X The impact of anthropogenic activity on ecosystems has highlighted the need to move beyond the biogeographical delineation of species richness patterns to understanding the vulnerability of species assemblages, including the functional components that are linked to the processes they support. We developed a decision theory framework to quantitatively assess the global taxonomic and functional vulnerability of fish assemblages on tropical reefs using a combination of sensitivity to species loss, exposure to threats and extent of protection. Fish assemblages with high taxonomic and functional sensitivity are often exposed to threats but are largely missed by the global network of marine protected areas. We found that areas of high species richness spatially mismatch areas of high taxonomic and functional vulnerability. Nevertheless, there is strong spatial match between taxonomic and functional vulnerabilities suggesting a potential win-win conservation-ecosystem service strategy if more protection is set in these locations. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Ceccarelli, D. M. %A McKinnon, A. D. %A Andréfouët, Serge %A Allain, V. %A Young, J. %A Gledhill, D. C. %A Flynn, A. %A Bax, N. J. %A Beaman, R. %A Borsa, Philippe %A Brinkman, R. %A Bustamante, R. H. %A Campbell, R. %A Cappo, M. %A Cravatte, Sophie %A D'Agata, S. %A Dichmont, C. M. %A Dunstan, P. K. %A Dupouy, Cécile %A Edgar, G. %A Farman, R. %A Furnas, M. %A Garrigue, Claire %A Hutton, T. %A Kulbicki, Michel %A Letourneur, Y. %A Lindsay, D. %A Menkès, Christophe %A Mouillot, D. %A Parravicini, Valeriano %A Payri, Claude %A Pelletier, Bernard %A Richer de Forges, B. %A Ridgway, K. %A Rodier, Martine %A Samadi, Sarah %A Schoeman, D. %A Skewes, T. %A Swearer, S. %A Vigliola, Laurent %A Wantiez, L. %A Williams, A. %A Richardson, A. J. %T The Coral Sea : physical environment, ecosystem status and biodiversity assets %D 2013 %L fdi:010062018 %G ENG %J Advances in Marine Biology %K Tropical sea ; Ecosystem function ; Connectivity ; Food web ; Pristine ecosystems ; Collaborative research ; GREAT-BARRIER-REEF ; SOUTHWEST PACIFIC-OCEAN ; EAST AUSTRALIAN CURRENT ; PAPUA-NEW-GUINEA ; SHARKS CARCHARODON-CARCHARIAS ; COASTAL MARINE ECOSYSTEMS ; LORD HOWE RISE ; NEW-CALEDONIA ; POPULATION CONNECTIVITY ; CLIMATE-CHANGE %K PACIFIQUE ; AUSTRALIE ; PAPOUASIE NOUVELLE GUINEE ; NOUVELLE CALEDONIE %M ISI:000332424000004 %P 213-290 %R 10.1016/b978-0-12-408096-6.00004-3 %U http://www.documentation.ird.fr/hor/fdi:010062018 %> http://www.documentation.ird.fr/intranet/publi/2014/06/010062018.pdf %V 66 %W Horizon (IRD) %X The Coral Sea, located at the southwestern rim of the Pacific Ocean, is the only tropical marginal sea where human impacts remain relatively minor. Patterns and processes identified within the region have global relevance as a baseline for understanding impacts in more disturbed tropical locations. Despite 70 years of documented research, the Coral Sea has been relatively neglected, with a slower rate of increase in publications over the past 20 years than total marine research globally. We review current knowledge of the Coral Sea to provide an overview of regional geology, oceanography, ecology and fisheries. Interactions between physical features and biological assemblages influence ecological processes and the direction and strength of connectivity among Coral Sea ecosystems. To inform management effectively, we will need to fill some major knowledge gaps, including geographic gaps in sampling and a lack of integration of research themes, which hinder the understanding of most ecosystem processes. %$ 036 ; 021 ; 032 ; 040 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Kulbicki, Michel %A Parravicini, Valeriano %A Bellwood, D. R. %A Arias-Gonzalez, E. %A Chabanet, Pascale %A Floeter, S. R. %A Friedlander, A. %A McPherson, J. %A Myers, R. E. %A Vigliola, Laurent %A Mouillot, D. %T Global biogeography of reef fishes : a hierarchical quantitative delineation of regions %D 2013 %L fdi:010061467 %G ENG %J Plos One %@ 1932-6203 %M ISI:000329194700004 %N 12 %P e81847 %R 10.1371/journal.pone.0081847 %U http://www.documentation.ird.fr/hor/fdi:010061467 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-11/010061467.pdf %V 8 %W Horizon (IRD) %X Delineating regions is an important first step in understanding the evolution and biogeography of faunas. However, quantitative approaches are often limited at a global scale, particularly in the marine realm. Reef fishes are the most diversified group of marine fishes, and compared to most other phyla, their taxonomy and geographical distributions are relatively well known. Based on 169 checklists spread across all tropical oceans, the present work aims to quantitatively delineate biogeographical entities for reef fishes at a global scale. Four different classifications were used to account for uncertainty related to species identification and the quality of checklists. The four classifications delivered converging results, with biogeographical entities that can be hierarchically delineated into realms, regions and provinces. All classifications indicated that the Indo-Pacific has a weak internal structure, with a high similarity from east to west. In contrast, the Atlantic and the Eastern Tropical Pacific were more strongly structured, which may be related to the higher levels of endemism in these two realms. The "Coral Triangle'', an area of the Indo-Pacific which contains the highest species diversity for reef fishes, was not clearly delineated by its species composition. Our results show a global concordance with recent works based upon endemism, environmental factors, expert knowledge, or their combination. Our quantitative delineation of biogeographical entities, however, tests the robustness of the results and yields easily replicated patterns. The similarity between our results and those from other phyla, such as corals, suggests that our approach may be of broad utility in describing and understanding global marine biodiversity patterns. %$ 036 ; 082 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Luiz, O. J. %A Allen, A. P. %A Robertson, D. R. %A Floeter, S. R. %A Kulbicki, Michel %A Vigliola, Laurent %A Becheler, R. %A Madin, J. S. %T Adult and larval traits as determinants of geographic range size among tropical reef fishes %D 2013 %L fdi:010061178 %G ENG %J Proceedings of the National Academy of Sciences of the United States of America %@ 0027-8424 %K macroecology ; marine dispersal ; colonization %K PACIFIQUE ; ATLANTIQUE ; ZONE TROPICALE %M ISI:000325395600054 %N 41 %P 16498-16502 %R 10.1073/pnas.1304074110 %U http://www.documentation.ird.fr/hor/fdi:010061178 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-11/010061178.pdf %V 110 %W Horizon (IRD) %X Most marine organisms disperse via ocean currents as larvae, so it is often assumed that larval-stage duration is the primary determinant of geographic range size. However, empirical tests of this relationship have yielded mixed results, and alternative hypotheses have rarely been considered. Here we assess the relative influence of adult and larval-traits on geographic range size using a global dataset encompassing 590 species of tropical reef fishes in 47 families, the largest compilation of such data to date for any marine group. We analyze this database using linear mixed-effect models to control for phylogeny and geographical limits on range size. Our analysis indicates that three adult traits likely to affect the capacity of new colonizers to survive and establish reproductive populations (body size, schooling behavior, and nocturnal activity) are equal or better predictors of geographic range size than pelagic larval duration. We conclude that adult life-history traits that affect the postdispersal persistence of new populations are primary determinants of successful range extension and, consequently, of geographic range size among tropical reef fishes. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Parravicini, Valeriano %A Kulbicki, Michel %A Bellwood, D. R. %A Friedlander, A. M. %A Arias-Gonzalez, J. E. %A Chabanet, Pascale %A Floeter, S. R. %A Myers, R. %A Vigliola, Laurent %A D'Agata, S. %A Mouillot, D. %T Global patterns and predictors of tropical reef fish species richness %D 2013 %L fdi:010061349 %G ENG %J Ecography %@ 0906-7590 %K MONDE ; ZONE TROPICALE %M ISI:000327777600002 %N 12 %P 1254-1262 %R 10.1111/j.1600-0587.2013.00291.x %U http://www.documentation.ird.fr/hor/fdi:010061349 %> http://www.documentation.ird.fr/intranet/publi/2014/01/010061349.pdf %V 36 %W Horizon (IRD) %X In the marine realm, the tropics host an extraordinary diversity of taxa but the drivers underlying the global distribution of marine organisms are still under scrutiny and we still lack an accurate global predictive model. Using a spatial database for 6336 tropical reef fishes, we attempted to predict species richness according to geometric, biogeographical and environmental explanatory variables. In particular, we aimed to evaluate and disentangle the predictive performances of temperature, habitat area, connectivity, mid-domain effect and biogeographical region on reef fish species richness. We used boosted regression trees, a flexible machine-learning technique, to build our predictive model and structural equation modeling to test for potential mediation effects' among predictors. Our model proved to be accurate, explaining 80% of the total deviance in fish richness using a cross-validated procedure. Coral reef area and biogeographical region were the primary predictors of reef fish species richness, followed by coast length, connectivity, mid-domain effect and sea surface temperature, with interactions between the region and other predictors. Important indirect effects of water temperature on reef fish richness, mediated by coral reef area, were also identified. The relationship between environmental predictors and species richness varied markedly among biogeographical regions. Our analysis revealed that a few easily accessible variables can accurately predict reef fish species richness. They also highlight concerns regarding ongoing environmental declines, with region-specific responses to variation in environmental conditions predicting a variable response to anthropogenic impacts. %$ 036 ; 020 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Jimenez, H. %A Bigot, L. %A Bourmaud, C. %A Chabanet, Pascale %A Gravier-Bonnet, N. %A Hamel, M. A. %A Payri, Claude %A Mattio, L. %A Menou, J. L. %A Naeem, S. %A Rilwan, Y. %A Sattar, S. %A Scott, L. %A Shiham, A. %A Vigliola, Laurent %A Andréfouët, Serge %T Multi-taxa coral reef community structure in relation to habitats in the Baa Atoll Man and Biosphere UNESCO Reserve (Maldives), and implications for its conservation %D 2012 %L fdi:010057124 %G ENG %J Journal of Sea Research %@ 1385-1101 %K Diversity ; Distribution ; Habitat typology ; Rarity ; Indian Ocean ; Conservation planning %M ISI:000307687500010 %P 77-86 %R 10.1016/j.seares.2012.04.011 %U http://www.documentation.ird.fr/hor/fdi:010057124 %> http://www.documentation.ird.fr/intranet/publi/2012/09/010057124.pdf %V 72 %W Horizon (IRD) %X The distribution of species in their environment is largely defined by habitat characteristics. Both species and habitat distributions can be used to define conservation areas, especially in highly diversified ecosystems like coral reefs where biodiversity inventories are lacking. The main objective of this study was to test the relationship between multi-taxa community structure (defined by richness, species lists, and taxonomic distinctness) and habitat typology in the Man and Biosphere UNESCO Reserve of Baa Atoll (Maldives). Species richness per taxon was described at 18 stations located on different habitats mapped using high resolution satellite imagery. A total of 1012 species were described including 178 macroalgae, 173 corals, 121 hydroids, 351 fish and 189 (other) macro-invertebrates. Rarity was extremely high for macro-invertebrates, algae and hydrozoans. The results highlighted a marked difference in species composition between stations for macro-algae and corals but not for other groups (hydroids, fish and macro-invertebrates). These distribution patterns were not strongly correlated to differences in habitat characteristics, which created a weak spatial structure of communities between habitats probably caused by differential exposure of atolls to monsoons and the 1998 bleaching event. Community differences between stations were often due to rarity. Therefore, identifying a network of protected areas that includes occurrences of all species may pose challenges. This is overcome by conservation planning scenarios using medium-size (of the order of 1 km(2)) management units. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved. %$ 036 ; 082 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Kronen, M. %A Pinca, S. %A Magron, F. %A McArdle, B. %A Vunisea, A. %A Vigliola, Laurent %A Kulbicki, Michel %A Andréfouët, Serge %T Socio-economic and fishery indicators to identify and monitor artisanal finfishing pressure in Pacific Island countries and territories %D 2012 %L fdi:010054373 %G ENG %J Ocean and Coastal Management %@ 0964-5691 %K PACIFIQUE ILES %M ISI:000299761500008 %P 63-73 %R 10.1016/j.ocecoaman.2011.07.011 %U http://www.documentation.ird.fr/hor/fdi:010054373 %> http://www.documentation.ird.fr/intranet/publi/2012/03/010054373.pdf %V 55 %W Horizon (IRD) %$ 040 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Kulbicki, Michel %A Beets, J. %A Chabanet, Pascale %A Cure, K. %A Darling, E. %A Floeter, S. R. %A Galzin, R. %A Green, A. %A Harmelin-Vivien, M. %A Hixon, M. %A Letourneur, Y. %A de Loma, T. L. %A McClanahan, T. %A McIlwain, J. %A Mou-Tham, Gérard %A Myers, R. %A O'Leary, J. K. %A Planes, S. %A Vigliola, Laurent %A Wantiez, L. %T Distributions of Indo-Pacific lionfishes Pterois spp. in their native ranges : implications for the Atlantic invasion %D 2012 %L fdi:010055722 %G ENG %J Marine Ecology-Progress Series %@ 0171-8630 %K Pterois ; Indo-Pacific ; Ecology ; Visual census ; Larvae ; Invasive species %M ISI:000301323600014 %P 189-205 %R 10.3354/meps09442 %U http://www.documentation.ird.fr/hor/fdi:010055722 %> http://www.documentation.ird.fr/intranet/publi/2012/04/010055722.pdf %V 446 %W Horizon (IRD) %X Lionfish (Pterois volitans and P. miles) have become a major concern in the western Attantie and Caribbean since their introduction in the 1980s. Invasive lionfish can reach very high population densities on coral reefs in their invaded range, yet there are few data from their native range in the Indo-Pacific for comparison. We compiled data on the geographical distribution and density of Indo-Pacific lionfishes in their native ranges from published and unpublished underwater visual censuses and field collections. We found that lionfish in their native Indo-Pacific range are unevenly distributed, with higher densities in the Indian Ocean than in the Pacific. Lionfish densities increase significantly with increasing latitude, and are significantly higher in continental areas than around islands. In the Indo-Pacific, lionfishes are found not only on reefs but also on soft bottoms and in nearshore habitats such as seagrass beds and mangroves, and near estuaries. Native lionfish can be found at depths greater than 75 m. Because lionfish can be cryptic and secretive, we estimate that only similar to 1/8 of Indo-Pacific lionfishes are detected during general underwater visual censuses. In the Pacific Ocean, the relative abundance of lionfish in the catch of reef-fish larvae is of the same order of magnitude as the relative abundance of adult lionfish within reef fish assemblages. Overall the observed densities of lionfishes in the Indo-Pacific are much lower (max. 26.3 fish ha(-1)) than the densities reported in their invaded Atlantic range (max. 400 fish ha(-1)). We found no effects of fishing or pollution on the densities of lionfishes. %$ 034 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Mercier, L. %A Mouillot, D. %A Bruguier, O. %A Vigliola, Laurent %A Darnaude, A. M. %T Multi-element otolith fingerprints unravel sea-lagoon lifetime migrations of gilthead sea bream Sparus aurata %D 2012 %L fdi:010054365 %G ENG %J Marine Ecology. Progress Series %@ 0171-8630 %K Otolith microchemistry ; Trace elements ; Random forest ; Key habitats ; Gulf of Lions %M ISI:000298970900013 %P 175-194 %R 10.3354/meps09444 %U http://www.documentation.ird.fr/hor/fdi:010054365 %> http://www.documentation.ird.fr/intranet/publi/2012/02/010054365.pdf %V 444 %W Horizon (IRD) %X Precise knowledge of lifetime migrations is vital in exploited fish species, since all essential habitats must be protected to maintain sustainable stock levels. The present study used multi-element otolith fingerprints of the gilthead sea bream Sparus aurata (L.) to discriminate its main juvenile and adult habitats in the Languedoc-Roussillon region (Gulf of Lions, northwest Mediterranean) and infer the lifetime migrations of 12 individuals from the area (11 from the present day and 1 from the Roman era). This allowed for the first time the identification of key habitats for the successful completion of the species' life cycle in the Gulf of Lions, and the connectivity between them. Our results revealed that lagoon use by S. aurata is probably ancient (>2500 yr) and confirmed its current commonness. Yet, although most observed migration patterns were in accordance with the migratory behavior previously described for the species, strong inter-individual variations and new patterns in habitat use were detected. At the juvenile stage, a preference for shallow lagoons with low salinities was evidenced. Nevertheless, the first year of life can also be successfully completed in marine conditions. At the adult stage, lagoon use was shown to occur until at least age 4 yr, with periods of lagoon residency of up to 11 mo in a year, often including winter months. Because overwintering in the lagoons was previously thought to be impossible for S. aurata due to low temperatures, this finding has important implications for future stock management, especially since the species breeds in winter. %$ 036 ; 020 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Pinca, S. %A Kronen, M. %A Magron, F. %A McArdle, B. %A Vigliola, Laurent %A Kulbicki, Michel %A Andréfouët, Serge %T Relative importance of habitat and fishing in influencing reef fish communities across seventeen Pacific Island Countries and Territories %D 2012 %L fdi:010057328 %G ENG %J Fish and Fisheries %@ 1467-2960 %K Fish community composition ; fishing impact ; habitat variability ; redundancy analysis ; spatial scales %M ISI:000310273500001 %N 4 %P 361-379 %R 10.1111/j.1467-2979.2011.00425.x %U http://www.documentation.ird.fr/hor/fdi:010057328 %> http://www.documentation.ird.fr/intranet/publi/2012/12/010057328.pdf %V 13 %W Horizon (IRD) %X Reef fish assessments were undertaken in 17 Pacific islands to describe the status of finfish resources in 63 villages where fishing is mainly artisanal. Surveys were performed by recording the number and size of edible fish species and benthic composition. Fishing impact was described through six proxies representing level of catch, alternative incomes, degree of commercial catch and country economic development derived from a simultaneous socioeconomic assessment. The relative importance of broadly defined habitat (geographical location, island and reef type, substrate composition) and fishing impact in controlling the distribution of fish trophic groups, families and species was measured through multivariate analysis. The extreme faunistic diversity was shown by the large variation in fish density (difference of up to an order of magnitude) and fish biomass (displaying a 20-fold difference across the region). Herbivores were dominant in the eastern part of the region, at what we classified as complex islands and at islands with small lagoon and at coastal reefs, while carnivores were dominant at oceanic islands and atolls and at outer reefs. Specific habitat associations were shown for Scaridae, Acanthuridae, Siganidae, Balistidae, Lethrinidae, Lutjanidae and Serranidae. Relative importance and size decrease of several fish families (Mullidae, Scaridae, Lutjanidae and Serranidae) were related to high fishing impact. Acanthuridae and Lethrinidae appeared to have a role as opportunistic groups in impacted sites. The relative impact from fishing and habitat on fishes accounted for, respectively, 20 and 30% of variance, demonstrating the effect of human impacts even at such large scale and taking into account only limited fishing impact variables. %$ 040 ; 036 %0 Journal Article %9 ACLN : Articles dans des revues avec comité de lecture non répertoriées par l'AERES %A Chabanet, Pascale %A Durville, P. %A Fricke, R. %A Amir, H. %A Vigliola, Laurent %T Checklist of the coral reef fishes of Baa Atoll, Maldives %B Biodiversity, resources, and conservation of Baa atoll (Republic of Maldives) : a UNESCO Man and Biosphere Reserve %D 2012 %E Andréfouët, Serge %L fdi:010059982 %G ENG %J Atoll Research Bulletin %@ 0077-5630 %K RECIF CORALLIEN ; POISSON MARIN ; TAXONOMIE ; INVENTAIRE FAUNISTIQUE ; FAMILLE ; ESPECE %K MALDIVES ; OCEAN INDIEN %K BAA ATOLL %N 590 %P 143-162 %U http://www.documentation.ird.fr/hor/fdi:010059982 %> http://www.documentation.ird.fr/intranet/publi/depot/2013-09-20/010059982.pdf %W Horizon (IRD) %$ 034BIOVER01 %0 Journal Article %9 ACLN : Articles dans des revues avec comité de lecture non répertoriées par l'AERES %A Criquet, Géraldine %A Vigliola, Laurent %A Chabanet, Pascale %T Spatial variation in otolith chemistry of Epinephelus merra in Baa Atoll, Maldives %B Biodiversity, resources, and conservation of Baa atoll (Republic of Maldives) : a UNESCO Man and Biosphere Reserve %D 2012 %E Andréfouët, Serge %L fdi:010059984 %G ENG %J Atoll Research Bulletin %@ 0077-5630 %K RECIF CORALLIEN ; POISSON MARIN ; OTOLITHE ; ANALYSE CHIMIQUE ; VARIATION SPATIALE ; ANALYSE DISCRIMINANTE %K MALDIVES %K BAA ATOLL %N 590 %P 201-206 %U http://www.documentation.ird.fr/hor/fdi:010059984 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-01/010059984.pdf %W Horizon (IRD) %$ 034BIOVER01 %0 Book Section %9 OS CH : Chapitres d'ouvrages scientifiques %A Kulbicki, Michel %A Vigliola, Laurent %A Wantiez, L. %T La biodiversité des poissons côtiers %B Atlas de la Nouvelle Calédonie %C Marseille (FRA) ; Nouméa %D 2012 %E Bonvallot, Jacques %E Gay, Jean-Christophe %E Habert, Elisabeth %L fdi:010058389 %G FRE %I IRD ; Congrès de la Nouvelle-Calédonie %@ 978-2-7099-1740-1 %K ATLAS ; RECIF ; POISSON MARIN ; STRUCTURE DU PEUPLEMENT ; DISTRIBUTION SPATIALE ; BIOMASSE ; STRUCTURE TROPHIQUE ; DIVERSITE SPECIFIQUE %K NOUVELLE CALEDONIE %K PACIFIQUE SUD %P 85-88 %U http://www.documentation.ird.fr/hor/fdi:010058389 %W Horizon (IRD) %$ 010ENCATL ; 036MILMAR01 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Guillemot, Nicolas %A Kulbicki, Michel %A Chabanet, Pascale %A Vigliola, Laurent %T Functional redundancy patterns reveal non-random assembly rules in a species-rich Marine assemblage %D 2011 %L fdi:010054173 %G ENG %J Plos One %@ 1932-6203 %M ISI:000296513200048 %N 10 %P e26735 %R 10.1371/journal.pone.0026735 %U http://www.documentation.ird.fr/hor/fdi:010054173 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-11/010054173.pdf %V 6 %W Horizon (IRD) %X The relationship between species and the functional diversity of assemblages is fundamental in ecology because it contains key information on functional redundancy, and functionally redundant ecosystems are thought to be more resilient, resistant and stable. However, this relationship is poorly understood and undocumented for species-rich coastal marine ecosystems. Here, we used underwater visual censuses to examine the patterns of functional redundancy for one of the most diverse vertebrate assemblages, the coral reef fishes of New Caledonia, South Pacific. First, we found that the relationship between functional and species diversity displayed a non-asymptotic power-shaped curve, implying that rare functions and species mainly occur in highly diverse assemblages. Second, we showed that the distribution of species amongst possible functions was significantly different from a random distribution up to a threshold of similar to 90 species/transect. Redundancy patterns for each function further revealed that some functions displayed fast rates of increase in redundancy at low species diversity, whereas others were only becoming redundant past a certain threshold. This suggested non-random assembly rules and the existence of some primordial functions that would need to be fulfilled in priority so that coral reef fish assemblages can gain a basic ecological structure. Last, we found little effect of habitat on the shape of the functional-species diversity relationship and on the redundancy of functions, although habitat is known to largely determine assemblage characteristics such as species composition, biomass, and abundance. Our study shows that low functional redundancy is characteristic of this highly diverse fish assemblage, and, therefore, that even species-rich ecosystems such as coral reefs may be vulnerable to the removal of a few keystone species. %$ 036 ; 020 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Mora, C. %A Aburto-Oropeza, O. %A Bocos, A. A. %A Ayotte, P. M. %A Banks, S. %A Bauman, A. G. %A Beger, M. %A Bessudo, S. %A Booth, D. J. %A Brokovich, E. %A Brooks, A. %A Chabanet, Pascale %A Cinner, J. E. %A Cortes, J. %A Cruz-Motta, J. J. %A Magana, A. C. %A DeMartini, E. E. %A Edgar, G. J. %A Feary, D. A. %A Ferse, S. C. A. %A Friedlander, A. M. %A Gaston, K. J. %A Gough, C. %A Graham, N. A. J. %A Green, A. %A Guzman, H. %A Hardt, M. %A Kulbicki, Michel %A Letourneur, Y. %A Perez, A. L. %A Loreau, M. %A Loya, Y. %A Martinez, C. %A Mascarenas-Osorio, I. %A Morove, T. %A Nadon, M. O. %A Nakamura, Y. %A Paredes, G. %A Polunin, N. V. C. %A Pratchett, M. S. %A Bonilla, H. R. %A Rivera, F. %A Sala, E. %A Sandin, S. A. %A Soler, G. %A Stuart-Smith, R. %A Tessier, E. %A Tittensor, D. P. %A Tupper, M. %A Usseglio, P. %A Vigliola, Laurent %A Wantiez, L. %A Williams, I. %A Wilson, S. K. %A Zapata, F. A. %T Global human footprint on the linkage between biodiversity and ecosystem functioning in reef fishes %D 2011 %L fdi:010053522 %G ENG %J Plos Biology %@ 1544-9173 %M ISI:000289938900001 %N 4 %P e1000606 %R 10.1371/journal.pbio.1000606 %U http://www.documentation.ird.fr/hor/fdi:010053522 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-11/010053522.pdf %V 9 %W Horizon (IRD) %X Difficulties in scaling up theoretical and experimental results have raised controversy over the consequences of biodiversity loss for the functioning of natural ecosystems. Using a global survey of reef fish assemblages, we show that in contrast to previous theoretical and experimental studies, ecosystem functioning (as measured by standing biomass) scales in a non-saturating manner with biodiversity (as measured by species and functional richness) in this ecosystem. Our field study also shows a significant and negative interaction between human population density and biodiversity on ecosystem functioning (i.e., for the same human density there were larger reductions in standing biomass at more diverse reefs). Human effects were found to be related to fishing, coastal development, and land use stressors, and currently affect over 75% of the world's coral reefs. Our results indicate that the consequences of biodiversity loss in coral reefs have been considerably underestimated based on existing knowledge and that reef fish assemblages, particularly the most diverse, are greatly vulnerable to the expansion and intensity of anthropogenic stressors in coastal areas. %$ 036 %0 Unpublished Work %9 AP : Autres productions %A Kulbicki, Michel %A Mou-Tham, Gérard %A Vigliola, Laurent %A Wantiez, L. %A Manaldo, Esther %A Labrosse, P. %A Letourneur, Y. %T Major coral reef fish species of the South Pacific with basic information on their biology and ecology %C Nouméa %D 2011 %L fdi:010062142 %G ENG %I IRD %K POISSON MARIN ; INVENTAIRE FAUNISTIQUE ; RECIF CORALLIEN ; ILE ; ABONDANCE ; BIOMASSE ; DIVERSITE SPECIFIQUE ; PREFERENCE TROPHIQUE ; BIOGEOGRAPHIE ; ESPECE ENDEMIQUE ; BIOMETRIE ; PROFONDEUR %K PACIFIQUE ILES ; NOUVELLE CALEDONIE ; POLYNESIE FRANCAISE %P 107 p. multigr. %U http://www.documentation.ird.fr/hor/fdi:010062142 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-11/010062142.pdf %W Horizon (IRD) %$ 034BIOVER01 ; 036MILMAR %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Chabanet, Pascale %A Guillemot, Nicolas %A Kulbicki, Michel %A Vigliola, Laurent %A Sarramegna, S. %T Baseline study of the spatio-temporal of reef fish assemblages prior to a major mining project in New Caledonia (South Pacific) %B New Caledonia tropical lagoons : an overview of multidisciplinary investigations %D 2010 %E Grenz, Christian %E Le Borgne, Robert %L fdi:010050849 %G ENG %J Marine Pollution Bulletin %@ 0025-326X %K RECIF CORALLIEN ; POISSON MARIN ; ABONDANCE ; DIVERSITE SPECIFIQUE ; BIOMASSE ; VARIATION SPATIALE ; VARIATION TEMPORELLE ; ETUDE COMPARATIVE ; SURVEILLANCE %K INDUSTRIE MINIERE ; IMPACT SUR L'ENVIRONNEMENT %K NOUVELLE CALEDONIE %M ISI:000282113200026 %N 7-12 %P 598-611 %R 10.1016/j.marpolbul.2010.06.032 %U http://www.documentation.ird.fr/hor/fdi:010050849 %> http://www.documentation.ird.fr/intranet/publi/depot/2010-10-27/010050849.pdf %V 61 %W Horizon (IRD) %$ 036MILMAR01 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Dalleau, Mayeul %A Andréfouët, Serge %A Wabnitz, C. C. C. %A Payri, Claude %A Wantiez, L. %A Pichon, M. %A Friedman, K. %A Vigliola, Laurent %A Benzoni, F. %T Use of habitats as surrogates of biodiversity for efficient coral reef conservation planning in Pacific Ocean Islands %D 2010 %L fdi:010049403 %G ENG %J Conservation Biology %@ 0888-8892 %K accumulation curves ; biodiversity surrogacy ; marine protected area ; Millennium Coral Reef Mapping Project ; remote sensing ; richness ; congruence ; Wallis %M ISI:000275877600024 %N 2 %P 541-552 %R 10.1111/j.1523-1739.2009.01394.x %U http://www.documentation.ird.fr/hor/fdi:010049403 %> http://www.documentation.ird.fr/intranet/publi/2010/04/010049403.pdf %V 24 %W Horizon (IRD) %X Marine protected areas (MPAs) have been highlighted as a means toward effective conservation of coral reefs. New strategies are required to more effectively select MPA locations and increase the pace of their implementation. Many criteria exist to design MPA networks, but generally, it is recommended that networks conserve a diversity of species selected for, among other attributes, their representativeness, rarity, or endemicity. Because knowledge of species' spatial distribution remains scarce, efficient surrogates are urgently needed. We used five different levels of habitat maps and six spatial scales of analysis to identify under which circumstances habitat data used to design MPA networks for Wallis Island provided better representation of species than random choice alone. Protected-area site selections were derived from a rarity-complementarity algorithm. Habitat surrogacy was tested for commercial fish species, all fish species, commercially harvested invertebrates, corals, and algae species. Efficiency of habitat surrogacy varied by species group, type of habitat map, and spatial scale of analysis. Maps with the highest habitat thematic complexity provided better surrogates than simpler maps and were more robust to changes in spatial scales. Surrogates were most efficient for commercial fishes, corals, and algae but not for commercial invertebrates. Conversely, other measurements of species-habitat associations, such as richness congruence and composition similarities provided weak results. We provide, in part, a habitat-mapping methodology for designation of MPAs for Pacific Ocean islands that are characterized by habitat zonations similar to Wallis. Given the increasing availability and affordability of space-borne imagery to map habitats, our approach could appreciably facilitate and improve current approaches to coral reef conservation and enhance MPA implementation. %$ 036 ; 082 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Kulbicki, Michel %A Cornuet, Nathaniel %A Vigliola, Laurent %A Wantiez, L. %A Mou-Tham, Gérard %A Chabanet, Pascale %T Counting coral reef fishes : interaction between fish life-history traits and transect design %D 2010 %L fdi:010049587 %G ENG %J Journal of Experimental Marine Biology and Ecology %@ 0022-0981 %K Bias ; Density estimate ; Fish ; Transect ; Underwater visual census %M ISI:000278643200003 %N 1-2 %P 15-23 %R 10.1016/j.jembe.2010.03.003 %U http://www.documentation.ird.fr/hor/fdi:010049587 %> http://www.documentation.ird.fr/intranet/publi/2010/07-1/010049587.pdf %V 387 %W Horizon (IRD) %X Underwater visual censuses are the most commonly used methods to estimate the density of reef fish populations and assemblages. One basic assumption is that the observer will always detect fish in the same way from one sampling unit to the next, implying that, on average, the spatial distribution pattern of fish abundance or occurrence remains the same from one transect to the next (H-0). The present work tested Ho using data from 730 transects covering two regions (New Caledonia and French Polynesia), 604 species and 504000 fish. Within transect variations in reef fish abundance and occurrence were studied according to site factors (region, reef type), life-history traits (adult size, home range, schooling behaviour, color, pattern, swimming speed, level in the water column, inquisitiveness, crypticity), and observations characteristics (distance of observation, size of the observed fishes, number of fishes within an observation, observer identity). Two general trends were detected: 1 at the start of transects, both fish occurrence and abundance were higher than the values expected under H-0; 2 a similar trend was also observed at the end of transects, but at a much lower magnitude. These effects were observed with varying degrees of magnitude for all regions, reef types and observers, varied significantly according to three life-history traits (size, home range, and behaviour), but were not influenced by species richness or abundance. These results indicate that datasets gathered from transects of various lengths cannot be pooled without correction. They also shed light on some of the known differences between transects and point counts. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Durieux, Eric %A Meekan, M.G. %A Ponton, Dominique %A Vigliola, Laurent %T Temperature, selective mortality and early growth in the short-lived clupeid Spratelloides gracilis %D 2009 %L fdi:010044329 %G ENG %J Journal of Fish Biology %@ 0022-1112 %K environmental factors ; Indo-Pacific region ; life-history traits ; otolith ; pelagic fishes ; size %M ISI:000264022500013 %N 4 %P 921-938 %R 10.1111/j.1095-8649.2009.02179.x %U http://www.documentation.ird.fr/hor/fdi:010044329 %> http://www.documentation.ird.fr/intranet/publi/2009/03/010044329.pdf %V 74 %W Horizon (IRD) %X Six cohorts of the silver-stripe round herring Spratelloides gracilis, a fast-growing and short-lived tropical clupeid, were collected as juveniles and then as adults during austral summers from November to February in 1998-1999 and 1999-2000, using light traps in the Dampier Archipelago, Western Australia. Otolith analysis allowed backcalculation of size and growth rate at age to examine the relative influences of selective mortality and water temperature on early growth. Negative size-selective mortality and growth-selective mortality between the juvenile and the adult stages was found only in the cohort that was the smallest and slowest growing in the period immediately following hatching. Selective mortality preferentially removed members of this cohort that were smaller from age 0 to 15 days, and slower growing from 0 to 10 days, resulting in an elevation of size at age to, or even above, that of cohorts that had not undergone this process. Size and growth rate at 5 day age intervals in the first 20 days after hatching differed among cohorts within and between summers and were strongly and positively correlated (r(2) = 0.61-0.83) with water temperature. %$ 040 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Mellin, Camille %A Andréfouët, Serge %A Kulbicki, Michel %A Dalleau, M. %A Vigliola, Laurent %T Remote sensing and fish-habitat relationships in coral reef ecosystems : review and pathways for systematic multi-scale hierarchical research %D 2009 %L fdi:010044259 %G ENG %J Marine Pollution Bulletin %@ 0025-326X %K Coral reef ; Diversity ; Fish ; Habitat ; Remote sensing ; Spatial scale %M ISI:000262963500013 %N 1 %P 11-19 %R 10.1016/j.marpolbul.2008.10.010 %U http://www.documentation.ird.fr/hor/fdi:010044259 %> http://www.documentation.ird.fr/intranet/publi/2009/02/010044259.pdf %V 58 %W Horizon (IRD) %X Understanding spatial variations in alpha, beta, and gamma coral reef fish diversity, as well as both local community and regional metacommunity structures, is critical for science and conservation of coral reef ecosystems. This quest implies that fish-habitat relationships are characterized across different spatial scales. Remote sensing allows now for a routine description of habitats from global-regional to detailed reef scales, thus theoretically offering access to hierarchical spatial analysis at multiple scales. To judge the progress in using remotely sensed habitat variables for reef fish study, existing peer-reviewed papers on the subject are reviewed. We tabulated the significant fish-habitat relationships given the different study sites, fish and habitat variables, statistical analysis, sampling efforts and scales. Studies generally do not corroborate each other. Instead, the exercise provides a diversity of thematic results from which lessons remain equivocal. It is thus justified to recommend more systematic and hierarchical remote-sensing based research in the future. We advocate the use of remote-sensing early in the design of the fish study, as part of a coherent conceptual scheme spanning all spatial scales. %$ 036 ; 126 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Mellin, Camille %A Galzin, R. %A Ponton, Dominique %A Vigliola, Laurent %T Detecting age-structured effects in growth performance of coral reef fish juveniles %D 2009 %L fdi:010048183 %G ENG %J Aquatic Biology %@ 1864-7790 %K Back-calculation ; Body size ; Generalised linear models ; Natural selection ; Repeated measures ; Settlement %M ISI:000269562400004 %N 1-3 %P 31-39 %R 10.3354/ab00163 %U http://www.documentation.ird.fr/hor/fdi:010048183 %> http://www.documentation.ird.fr/intranet/publi/2009/09/010048183.pdf %V 6 %W Horizon (IRD) %X The growth performance of coral reef fish juveniles collected in different habitats is often used as a proxy for habitat quality for juveniles. However, back-calculated growth trajectories of juveniles may be age-structured, for instance, because of potential differences in initial offspring size and/or quality or size-selective mortality. A novel approach is proposed to isolate growth performance of coral reef fish juveniles from potential age-based factors. Juveniles of Chromis viridis (Pomacentridae), Lethrinus genivittatus (Lethrinidae) and Siganus fuscescens (Siganidae) were collected from waters around inshore and offshore islets in a coral reef lagoon. Individual growth trajectories were back-calculated from otolith increments and compared with repeated-measures generalised linear models (RM-GLMs). Settlement marks in otoliths were used to differentiate larval and juvenile growth trajectories for each individual. For the 3 species, fish from around the offshore islet presented significantly larger size-at-age during their larval stage than those from from around the inshore islet. Juveniles of L. genivittatus and S. fuscescens from around the offshore islet remained larger than inshore juveniles at the same age, while growth curves of C. viridis from the 2 islets crossed at settlement so that inshore fish were larger as juveniles than offshore individuals. RM-GLMs revealed that the growth trajectory was significantly age-structured for C. Oridis only. These results suggest that post-settlement age may be used as a covariate in comparative analyses of larval growth in order to isolate growth performance from potential age-based factors. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Trape, Sébastien %A Durand, Jean-Dominique %A Guilhaumon, F. %A Vigliola, Laurent %A Panfili, Jacques %T Recruitment patterns of young-of-the-year mugilid fishes in a West African estuary impacted by climate change %D 2009 %L fdi:010048429 %G ENG %J Estuarine Coastal and Shelf Science %@ 0272-7714 %K inverse estuary ; hypersaline ; Mugilidae ; juveniles ; habitat use ; West Africa %M ISI:000272286000002 %N 3 %P 357-367 %R 10.1016/j.ecss.2009.08.018 %U http://www.documentation.ird.fr/hor/fdi:010048429 %> http://www.documentation.ird.fr/intranet/publi/2009/12/010048429.pdf %V 85 %W Horizon (IRD) %X With the persistence of the sub-Saharan drought since the 1970s, the Sine Saloum estuary (Senegal) the second largest coastal Biosphere Reserve of West-Africa - has become an "inverse estuary" and hypersaline (salinity> 60) in its upstream part. A one-year survey was conducted from April 2007 to March 2008 at eight sites distributed along the salinity gradient, to investigate the recruitment patterns of young-of-the-year mugilids in such an impacted ecosystem. Fishes were sampled monthly with a conical net and a beach seine in salinities ranging from 31 to 104. Samples were identified to the species level. For the smallest individuals (<20 mm SL) a PCR-RFLP technique, developed on the mitochondrial 16S ribosomal RNA region, was used for identification. A total of 8438 juveniles belonging to six of the eight species of mugilids known for the tropical Eastern Atlantic were collected: Mugil bananensis, Mugil cephalus, Mugil curema, Liza dumerili, Liza falcipinnis and Liza grandisquamis. One species, L dumerili, represented 89% of the total catch. Length-frequency distributions revealed that M. cephalus and L. dumerili preferentially recruited during the dry season whereas the recruitment of M. curema, M. bananensis and L. falcipinnis generally occurred during the wet season. Minimal size at recruitment ranged from 9 to 19 mm SL depending on the species, the smallest size being that of L dumerili. Despite the general salinity increase in the estuary, most parts of the Sine Saloum were suitable for the juveniles. Only the hypersaline area in the uppermost part of the estuary presented very low fish abundance for all species. According to the species, small recruits (12-20 mm SL) were collected at salinities up to 47-78, suggesting that osmoregulatory capacities had been gained early during ontogenesis, possibly resulting from an adaptation of these populations to changing environmental conditions. %$ 036 %0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Wilson, J.A. %A Vigliola, Laurent %A Meekan, M.G. %T The back-calculation of size and growth from otoliths: validation and comparison of models at an individual level %D 2009 %L fdi:010061066 %G ENG %J Journal of Experimental Marine Biology and Ecology %@ 0022-0981 %K OTOLITHE ; POISSON MARIN ; AGE ; DATATION ; MODELISATION %M WOS:000262058500002 %P 9-21 %U http://www.documentation.ird.fr/hor/fdi:010061066 %> http://www.documentation.ird.fr/intranet/publi/depot/2014-03-14/010061066.pdf %V 368 %W Horizon (IRD) %$ 034BIOVER01 %0 Unpublished Work %9 AP : Autres productions %A Kulbicki, Michel %A Andrefouët, Serge %A Boblin, P. %A Chabanet, Pascale %A Evans, R. %A Mou-Tham, Gérard %A Kronen, M. %A Labrosse, P. %A Maihota, N. %A Samasauni, S. %A Sarramégna, S. %A Vigliola, Laurent %A Williamson, D. %T Projet "Pêcheries récifales" : rapport de convention ZONECO %C Perpignan %D 2006 %L fdi:010061069 %G FRE %I IRD %K RECIF CORALLIEN ; LAGON ; RESSOURCES HALIEUTIQUES ; POISSON MARIN ; TAXONOMIE ; STRUCTURE DU PEUPLEMENT ; ECHANTILLONNAGE ; METHODE D'ANALYSE %K RELATION ESPECE ENVIRONNEMENT %K NOUVELLE CALEDONIE ; LIFOU ; PACIFIQUE ILES %P 58 p. multigr. %U http://www.documentation.ird.fr/hor/fdi:010061069 %> http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-11/010061069.pdf %W Horizon (IRD) %$ 040PECHE