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Lopez J., Moreno G., Lennert-Cody C., Maunder M., Sancristobal I., Caballero A., Dagorn Laurent. (2017). Environmental preferences of tuna and non-tuna species associated with drifting fish aggregating devices (DFADs) in the Atlantic Ocean, ascertained through fishers' echo-sounder buoys. Deep-Sea Research Part II : Topical Studies in Oceanography, 140 (SI), 127-138. ISSN 0967-0645

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Lien direct chez l'éditeur doi:10.1016/j.dsr2.2017.02.007

Titre
Environmental preferences of tuna and non-tuna species associated with drifting fish aggregating devices (DFADs) in the Atlantic Ocean, ascertained through fishers' echo-sounder buoys
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000403513400013
AuteursLopez J., Moreno G., Lennert-Cody C., Maunder M., Sancristobal I., Caballero A., Dagorn Laurent.
SourceDeep-Sea Research Part II : Topical Studies in Oceanography, 2017, 140 (SI), p. 127-138. ISSN 0967-0645
RésuméUnderstanding the relationship between environmental variables and pelagic species concentrations and dynamics is helpful to improve fishery management, especially in a changing environment. Drifting fish aggregating device (DFAD)-associated tuna and non-tuna biomass data from the fishers' echo-sounder buoys operating in the Atlantic Ocean have been modelled as functions of oceanographic (Sea Surface Temperature, Chlorophyll-a, Salinity, Sea Level Anomaly, Thermocline depth and gradient, Geostrophic current, Total Current, Depth) and DFAD variables (DFAD speed, bearing and soak time) using Generalized Additive Mixed Models (GAMMs). Biological interaction (presence of non-tuna species at DFADs) was also included in the tuna model, and found to be significant at this time scale. All variables were included in the analyses but only some of them were highly significant, and variable significance differed among fish groups. In general, most of the fish biomass distribution was explained by the ocean productivity and DFAD-variables. Indeed, this study revealed different environmental preferences for tunas and non-tuna species and suggested the existence of active habitat selection. This improved assessment of environmental and DFAD effects on tuna and non-tuna catchability in the purse seine tuna fishery will contribute to transfer of better scientific advice to regional tuna commissions for the management and conservation of exploited resources.
Plan de classementRessources halieutiques [040] ; Ecologie, systèmes aquatiques [036]
Descr. géo.ATLANTIQUE
LocalisationFonds IRD [F B010070231]
Identifiant IRDfdi:010070231
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010070231

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