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| Morfin, Marie; Kopp, Dorothee; Benoît, Hugues P.; Méhault, Sonia. |
| Two vitality index approaches have been demonstrated to be good proxies of discard survival in similar fishing and environmental conditions: Reflex Action Mortality Predictors combined with injuries (RI) scores that measure the proportion of impaired reflexes and injuries, and a simpler, quicker, but less precise approach based on ordinal categories related to fish body movements and injuries (semi-quantitative assessment, SQA). This study assessed and compared these two approaches for five species (two flatfishes, skates, a seabass and a catshark) discarded in a coastal otter trawl fishery in the Bay of Biscay. All species displayed good vitality status according to both indices and were not very sensitive to the fishing nor their biological conditions.... |
| Tipo: Text |
Palavras-chave: Discard survival; Vitality indicators; Reflex Action Mortality Predictor; Bay of Biscay; Coastal otter trawl fishery. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00466/57817/60417.pdf |
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| Merillet, Laurene; Mehault, Sonia; Rimaud, Thomas; Piton, Corentine; Morandeau, Fabien; Morfin, Marie; Kopp, Dorothee. |
| In the context of the landing obligation set by the new Common Fisheries Policy (CFP), Norway lobster Nephrops norvegicus was identified as a species likely to have high survival rate when discarded in the bottom trawl fishery of the Bay of Biscay. Previous studies in this area reported a survival rate between 30% and 51%, but the experiments were done on a limited monitoring period and the seasonal variations were not investigated. This study was designed to obtain a reliable value for survival rate after a 14-day monitoring period in onshore tanks allowing considering delayed mortality. The study also tested the effect on the survival rate of using a discarding chute system, a sorting device that was made mandatory on the 1st of January 2017 for Nephrops... |
| Tipo: Text |
Palavras-chave: Nephrops norvegicus; Sorting process; Captivity; Vitality; Season; Discard survival. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00407/51864/52608.pdf |
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