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Letessier T. B., Mouillot D., Bouchet P. J., Vigliola Laurent, Fernandes M. C., Thompson C., Boussarie G., Turner J., Juhel J. B., Maire E., Caley M. J., Koldewey H. J., Friedlander A., Sala E., Meeuwig J. J. (2019). Remote reefs and seamounts are the last refuges for marine predators across the Indo-Pacific. PLoS Biology, 17 (8), e3000366 [20 p.]. ISSN 1544-9173

Fichier PDF disponiblehttp://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers19-09/010076637.pdf[ PDF Link ]

Lien direct chez l'éditeur doi:10.1371/journal.pbio.3000366

Titre
Remote reefs and seamounts are the last refuges for marine predators across the Indo-Pacific
Année de publication2019
Type de documentArticle référencé dans le Web of Science WOS:000483408500011
AuteursLetessier T. B., Mouillot D., Bouchet P. J., Vigliola Laurent, Fernandes M. C., Thompson C., Boussarie G., Turner J., Juhel J. B., Maire E., Caley M. J., Koldewey H. J., Friedlander A., Sala E., Meeuwig J. J.
SourcePLoS Biology, 2019, 17 (8), p. e3000366 [20 p.]. p. e3000366 [20 p.] ISSN 1544-9173
RésuméSince the 1950s, industrial fisheries have expanded globally, as fishing vessels are required to travel further afield for fishing opportunities. Technological advancements and fishery subsidies have granted ever-increasing access to populations of sharks, tunas, billfishes, and other predators. Wilderness refuges, defined here as areas beyond the detectable range of human influence, are therefore increasingly rare. In order to achieve marine resources sustainability, large no-take marine protected areas (MPAs) with pelagic components are being implemented. However, such conservation efforts require knowledge of the critical habitats for predators, both across shallow reefs and the deeper ocean. Here, we fill this gap in knowledge across the Indo-Pacific by using 1,041 midwater baited videos to survey sharks and other pelagic predators such as rainbow runner (Elagatis bipinnulata), mahimahi (Coryphaena hippurus), and black marlin (Istiompax indica). We modeled three key predator community attributes: vertebrate species richness, mean maximum body size, and shark abundance as a function of geomorphology, environmental conditions, and human pressures. All attributes were primarily driven by geomorphology (35%-62% variance explained) and environmental conditions (14%-49%). While human pressures had no influence on species richness, both body size and shark abundance responded strongly to distance to human markets (12%-20%). Refuges were identified at more than 1,250 km from human markets for body size and for shark abundance. These refuges were identified as remote and shallow seabed features, such as seamounts, submerged banks, and reefs. Worryingly, hotpots of large individuals and of shark abundance are presently under-represented within no-take MPAs that aim to effectively protect marine predators, such as the British Indian Ocean Territory. Population recovery of predators is unlikely to occur without strategic placement and effective enforcement of large no-take MPAs in both coastal and remote locations.
Plan de classementEcologie, systèmes aquatiques [036] ; Limnologie biologique / Océanographie biologique [034] ; Ressources halieutiques [040]
Descr. géo.PACIFIQUE ; OCEAN INDIEN
LocalisationFonds IRD [F B010076637]
Identifiant IRDfdi:010076637
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010076637

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