Torres-Irineo E., Amandè M.J., Gaertner Daniel, Delgado de Molina A., Murua H., Chavance Pierre, Ariz J., Ruiz J., Lezama-Ochoa N. (2014). Bycatch species composition over time by tuna purse-seine fishery in the eastern tropical Atlantic Ocean. Biodiversity and Conservation, 23 (5), p. 1157-1173. ISSN 0960-3115.
Titre du document
Bycatch species composition over time by tuna purse-seine fishery in the eastern tropical Atlantic Ocean
Torres-Irineo E., Amandè M.J., Gaertner Daniel, Delgado de Molina A., Murua H., Chavance Pierre, Ariz J., Ruiz J., Lezama-Ochoa N.
Source
Biodiversity and Conservation, 2014,
23 (5), p. 1157-1173 ISSN 0960-3115
Within the Ecosystem-based fisheries management framework, we evaluated the changes over time in bycatch species of the European tuna purse-seine fishery operating in the eastern Atlantic Ocean. Bycatch data was collected during two scientific observer programs conducted in the late 1990s and in the late 2000s. Over these two time periods, we compared the temporal trends in bycatch species composition, the probability of occurrence of functional groups per fishing set, the spatio-temporal species richness and the potential impact on several species listed in the red list of the International Union for Conservation of Nature (IUCN). The analyses were performed separately on the two main fishing modes of the fleet, i.e. sets on free-swimming school sets and on fish aggregating devices (FADs). Owing data quality constraints, we did not estimate bycatch rates. Ours results showed that the species composition of sharks caught on FADs decreased over time. The total species richness was higher for FAD sets than for free-swimming school sets (87 vs. 61 species respectively), such difference is common between fishing modes worldwide.
