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HomeThe provision of advice on the conservation of pelagic sharks associated to fishing activity under EU sustainable fisheries partnership agreements in the Atlantic Ocean
The provision of advice on the conservation of pelagic sharks associated to fishing activity under EU sustainable fisheries partnership agreements in the Atlantic Ocean
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Pelagic sharks are an important bycatch in pelagic swordfish longline fisheries. In the Cabo Verde Archipelago (tropical NE Atlantic), pelagic shark catches can reach important levels, sometimes higher than the target species. Due to the increased concern on the status of shark species, an EU funded project (MARE/2012/21 - SC7) was developed to provide scientific advice on the conservation of pelagic sharks associated with the EU fishing activity, in a collaboration between several EU and Cabo Verde research Institutes. A satellite tagging program was established with the deployment of 30 satellite tags in blue and shortfin mako sharks in the Cabo Verde EEZ, showing that those species are highly mobile. Stock status indicators for the main species were created, including analysis of size frequency distributions over time and standardized catch-per-unit-of-effort (CPUE) indexes. The standardized CPUEs have been stable for the past 10 years, indicating no signs of local depletion. In terms of sizes, the blue shark catch is composed mainly of adults, which is a sign of a healthier population. By the contrary, the catch of shortfin mako is composed mainly of juveniles, which is a cause of concern. The biomass and size distributions were modeled with spatial and seasonal models (GAMs) identifying locations where juveniles are predominantly concentrated and that should be prioritized for conservation. This work presents new information on the status of pelagic sharks in the Cabo Verde region, and can now be used to promote more sustainable fisheries in the region.
- Published:
- Corporate author(s): AZTI , Executive Agency for Small and Medium-sized Enterprises (European Commission) , IEO , INDP , IPMA , MRAG
- Personal author(s): Clark, James ; Bach, Pascal ; Monteiro, Carlos ; Rosa, Daniela ; Murua, Hilario ; Coelho, Rui ; Macías, David ; Ortiz Urbina, Josetxu ; Martins, Albertino ; Abaunza, Pablo
- Themes: Fisheries policy
- Subject: Atlantic Ocean , coastal protection , conservation of fish stocks , fisheries policy , fishing agreement , fishing controls , fishing regulations , satellite , sustainable development
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| ISSN | ISBN 978-92-9202-228-0 | DOI 10.2826/305888 | Catalogue number EA-01-17-223-EN-N |
- Released on EU Publications:
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