Updated standardized CPUE of blue shark bycaught by the French Reunion-based pelagic longline fishery (2007-2020)

Type Proceedings paper
Date 2021
Language English
Other localization https://www.iotc.org/sites/default/files/documents/2021/04/IOTC-2021-WPEB17DP-08_Rev1.pdf
Author(s) Sabarros Philippe1, 2, Coelho Rui3, Romanov Evgeny V4, Guillon Nicolas4, Bach Pascal1, 2
Affiliation(s) 1 : MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
2 : Institut de Recherche pour le Développement (IRD), Observatoire des Écosystèmes Pélagiques Tropicaux Exploités (Ob7), Av. Jean Monnet, 34200 Sète, France
3 : Instituto Português do Mare da Atmosfera (IPMA), Av. 5 de Outubro, 8700-305 Olhão, Portugal
4 : CITEB, CAPRUN, Darse de pêche hauturière, 97410 Le Port, La Réunion
Meeting WPEB17(DP) - 17th Working Party on Ecosystems and Bycatch, Data preparatory. 12/04/2021 - 14/04/2021, Online/Virtual
Source WPEB17(DP) - 17th Working Party on Ecosystems and Bycatch, Data preparatory. 12/04/2021 - 14/04/2021, Online/Virtual. IOTC-2021-WPEB17(DP)-08_Rev1
Keyword(s) Blue shark, CPUE standardization, Longline, Western Indian Ocean
Abstract

The blue shark Prionace glauca is the main bycatch species of the French swordfish-targeting longline fishery operating in the south-west Indian Ocean. Using observer and self-reported data collected aboard commercial longliners between 2007 and 2020, we propose a standardized CPUE series for blue shark for this fishery estimated with a lognormal generalized linear mixed model (GLMM) to be used for the upcoming stock assessment. We propose to use the standardized CPUE for the period comprised between 2011 and 2020 where the monitoring effort has been consequent in comparison with previous years. Throughout 2011-2020, the standardized CPUE for the blue shark shows a significant decreasing trend.

Full Text
File Pages Size Access
Publisher's official version 17 777 KB Open access
Top of the page

How to cite 

Sabarros Philippe, Coelho Rui, Romanov Evgeny V, Guillon Nicolas, Bach Pascal (2021). Updated standardized CPUE of blue shark bycaught by the French Reunion-based pelagic longline fishery (2007-2020). WPEB17(DP) - 17th Working Party on Ecosystems and Bycatch, Data preparatory. 12/04/2021 - 14/04/2021, Online/Virtual. IOTC-2021-WPEB17(DP)-08_Rev1. https://archimer.ifremer.fr/doc/00690/80162/