Toothed whale and shark depredation and bycatch in the longline fishery of French Polynesia
Marine megafauna feeding on fishery catches (depredation) or being incidentally caught on fishing gear (bycatch) have become important issues. Their socioeconomic and conservation stakes have been increasingly studied across the world fisheries. They remain understudied in the Pacific Ocean, where l...
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2024
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ftarchimer:oai:archimer.ifremer.fr:98103 2024-03-24T09:05:33+00:00 Toothed whale and shark depredation and bycatch in the longline fishery of French Polynesia Aminian Biquet, Juliette Tixier, Paul Richard, Gaetan Soehnlen, Marie Thellier, Thibaut Carzon, Pamela Clua, Eric Guinet, Christophe 2024-03 application/pdf https://archimer.ifremer.fr/doc/00869/98103/107367.pdf https://archimer.ifremer.fr/doc/00869/98103/107368.docx https://doi.org/10.1016/j.fishres.2023.106928 https://archimer.ifremer.fr/doc/00869/98103/ eng eng Elsevier BV https://archimer.ifremer.fr/doc/00869/98103/107367.pdf https://archimer.ifremer.fr/doc/00869/98103/107368.docx doi:10.1016/j.fishres.2023.106928 https://archimer.ifremer.fr/doc/00869/98103/ info:eu-repo/semantics/openAccess restricted use Fisheries Research (0165-7836) (Elsevier BV), 2024-03 , Vol. 271 , P. 106928 (12p.) Fisheries Elasmobranch and cetacean conservation Depredation Bycatch Pacific text Article info:eu-repo/semantics/article 2024 ftarchimer https://doi.org/10.1016/j.fishres.2023.106928 2024-02-27T08:55:35Z Marine megafauna feeding on fishery catches (depredation) or being incidentally caught on fishing gear (bycatch) have become important issues. Their socioeconomic and conservation stakes have been increasingly studied across the world fisheries. They remain understudied in the Pacific Ocean, where longline tuna fisheries reported such interactions. In this study, we provide the first assessment of bycatch and depredation by sharks and odontocetes on longlines in French Polynesia between 2000 and 2018, using data from observers reporting, captains’ logbooks, questionnaires and additional monitoring by authors during three fishing trip. We found that less than 2% of the catch had been depredated, and that shark depredation was more common than odontocete depredation. Shark bycatch was important (20,000 sharks annually, 0.5 shark every 1000 hooks) and odontocete bycatch seemed low (13 occurrences in 18 years), though we identified clear reporting flaws. We discuss the range of uncertainty associated with our assessment, based on the current reporting systems, and the potential consequences of depredation and bycatch on tuna fisheries, as well as on shark and odontocete populations in French Polynesia. Article in Journal/Newspaper toothed whale Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Pacific Fisheries Research 271 106928 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Fisheries Elasmobranch and cetacean conservation Depredation Bycatch Pacific |
spellingShingle |
Fisheries Elasmobranch and cetacean conservation Depredation Bycatch Pacific Aminian Biquet, Juliette Tixier, Paul Richard, Gaetan Soehnlen, Marie Thellier, Thibaut Carzon, Pamela Clua, Eric Guinet, Christophe Toothed whale and shark depredation and bycatch in the longline fishery of French Polynesia |
topic_facet |
Fisheries Elasmobranch and cetacean conservation Depredation Bycatch Pacific |
description |
Marine megafauna feeding on fishery catches (depredation) or being incidentally caught on fishing gear (bycatch) have become important issues. Their socioeconomic and conservation stakes have been increasingly studied across the world fisheries. They remain understudied in the Pacific Ocean, where longline tuna fisheries reported such interactions. In this study, we provide the first assessment of bycatch and depredation by sharks and odontocetes on longlines in French Polynesia between 2000 and 2018, using data from observers reporting, captains’ logbooks, questionnaires and additional monitoring by authors during three fishing trip. We found that less than 2% of the catch had been depredated, and that shark depredation was more common than odontocete depredation. Shark bycatch was important (20,000 sharks annually, 0.5 shark every 1000 hooks) and odontocete bycatch seemed low (13 occurrences in 18 years), though we identified clear reporting flaws. We discuss the range of uncertainty associated with our assessment, based on the current reporting systems, and the potential consequences of depredation and bycatch on tuna fisheries, as well as on shark and odontocete populations in French Polynesia. |
format |
Article in Journal/Newspaper |
author |
Aminian Biquet, Juliette Tixier, Paul Richard, Gaetan Soehnlen, Marie Thellier, Thibaut Carzon, Pamela Clua, Eric Guinet, Christophe |
author_facet |
Aminian Biquet, Juliette Tixier, Paul Richard, Gaetan Soehnlen, Marie Thellier, Thibaut Carzon, Pamela Clua, Eric Guinet, Christophe |
author_sort |
Aminian Biquet, Juliette |
title |
Toothed whale and shark depredation and bycatch in the longline fishery of French Polynesia |
title_short |
Toothed whale and shark depredation and bycatch in the longline fishery of French Polynesia |
title_full |
Toothed whale and shark depredation and bycatch in the longline fishery of French Polynesia |
title_fullStr |
Toothed whale and shark depredation and bycatch in the longline fishery of French Polynesia |
title_full_unstemmed |
Toothed whale and shark depredation and bycatch in the longline fishery of French Polynesia |
title_sort |
toothed whale and shark depredation and bycatch in the longline fishery of french polynesia |
publisher |
Elsevier BV |
publishDate |
2024 |
url |
https://archimer.ifremer.fr/doc/00869/98103/107367.pdf https://archimer.ifremer.fr/doc/00869/98103/107368.docx https://doi.org/10.1016/j.fishres.2023.106928 https://archimer.ifremer.fr/doc/00869/98103/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
toothed whale |
genre_facet |
toothed whale |
op_source |
Fisheries Research (0165-7836) (Elsevier BV), 2024-03 , Vol. 271 , P. 106928 (12p.) |
op_relation |
https://archimer.ifremer.fr/doc/00869/98103/107367.pdf https://archimer.ifremer.fr/doc/00869/98103/107368.docx doi:10.1016/j.fishres.2023.106928 https://archimer.ifremer.fr/doc/00869/98103/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.fishres.2023.106928 |
container_title |
Fisheries Research |
container_volume |
271 |
container_start_page |
106928 |
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1794407299154968576 |