Consulta: creatorFacets:"Coelho, Rui"
Registros recuperados: 4
Data/hora: 12/06/2024 09:56:51

Updated standardized CPUE of blue shark bycaught by the French Reunion-based pelagic longline fishery (2007-2020)
Provedor de dados: 5
Autores: Sabarros, Philippe; Coelho, Rui; Romanov, Evgeny V; Guillon, Nicolas; Bach, Pascal.
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.
Tipo: Text
Palavras-chave: Blue shark; CPUE standardization; Longline; Western Indian Ocean.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00690/80162/83227.pdf

Beyond Post-release Mortality: Inferences on Recovery Periods and Natural Mortality From Electronic Tagging Data for Discarded Lamnid Sharks
Provedor de dados: 5
Autores: Bowlby, Heather D.; Benoît, Hugues P.; Joyce, Warren; Sulikowski, James; Coelho, Rui; Domingo, Andrés; Cortés, Enric; Hazin, Fabio; Macias, David; Biais, Gerard; Santos, Catarina; Anderson, Brooke.
Accurately characterizing the biology of a pelagic shark species is critical when assessing its status and resilience to fishing pressure. Natural mortality (M) is well known to be a key parameter determining productivity and resilience, but also one for which estimates are most uncertain. While M can be inferred from life history, validated direct estimates are extremely rare for sharks. Porbeagle (Lamna nasus) and shortfin mako (Isurus oxyrinchus) are presently overfished in the North Atlantic, but there are no directed fisheries and successful live release of bycatch is believed to have increased. Understanding M, post-release mortality (PRM), and variables that affect mortality are necessary for management and effective bycatch mitigation. From 177...
Tipo: Text
Palavras-chave: Natural mortality; Recovery period; Lamnid sharks; Atlantic; Survival; Mitigation; Bycatch.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/80020/83005.pdf

Technical mitigation measures for sharks and rays in fisheries   for tuna and tuna-like species: turning possibility into reality
Provedor de dados: 5
Autores: Poisson, Francois; Abascal Crespo, Francisco; Ellis, Jim R.; Chavance, Pierre; Pascal, Bach; Santos, Miguel. N.; Seret, Bernard; Korta, Maria; Coelho, Rui; Ariz, Javier; Murua, Hilario.
Tuna fisheries have been identified as one of the major threats to populations of other marine vertebrates, including sea turtles, sharks, seabirds and marine mammals. The development of technical mitigation measures (MM) in fisheries is part of the code of conduct for responsible fisheries. An in-depth analysis of the available literature regarding bycatch mitigation in tuna fisheries with special reference to elasmobranchs was undertaken. Studies highlighting promising MMs were reviewed for four tuna fisheries (longline, purse seine, driftnets and gillnet, and rod and line – including recreational fisheries). The advantages and disadvantages of different MMs are discussed and assessed based on current scientific knowledge. Current management measures for...
Tipo: Text
Palavras-chave: Mitigation; Elasmobranch; Bycatch; Pelagic; Mortality; Tuna regional fishery management organizations.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00364/47474/47493.pdf

Reunion island pelagic longline fishery characterization and standardization of albacore catch rates
Provedor de dados: 5
Autores: Coelho, Rui; Nikolic, Natacha; Evano, Hugues; Miguel, N; Santos; Bourjea, Jerome.
This document presents a characterization of the Reunion Island pelagic longline fishery, with a first description of the albacore catches, catch-at-size, and the standardized catch per unit of effort (CPUE) series for the period 1992-2013. The spatial catch and effort analysis revealed the major areas of operation of the fishery, and the identification of the fishery core region closer to the Reunion Island area. The trends in the albacore catch-at-size were analyzed annually, and compared between the seasons and regions of operation of the fishery. The albacore nominal CPUEs were calculated as number of fish per 1000 hooks, and were standardized using Generalized Linear Models (GLMs). Four different modeling approaches were used (including Tweedie,...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00208/31926/30344.pdf