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Registros recuperados: 25
Primeira ... 12 ... Última
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Survivability of discarded Norway lobster in the bottom trawl fishery of the Bay of Biscay ArchiMer
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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Survival of discarded Nephrops norvegicus after trawling in the Bay of Biscay ArchiMer
Mehault, Sonia; Morandeau, Fabien; Kopp, Dorothee.
The new Common Fisheries Policy may exempt some species from the landing obligation if a high survival rate can be demonstrated among discards. This study focuses on the survival capacity of Nephrops norvegicus discarded from trawlers of the Bay of Biscay (France). Three sea trials were conducted on board 3 commercial trawlers and 15 fishing operations were sampled. The vitality of Nephrops was classed into three categories (healthy, moribund or dead) before release at sea and samples of healthy and moribund individuals were kept in captivity on Nephrops grounds for three days. A Generalised Linear Model was used to examine the variability in the proportion of healthy Nephrops discarded, which was significantly influenced by tow duration, duration of air...
Tipo: Text Palavras-chave: Vitality; Captivity; South western waters; Bottom trawl; GLM.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00346/45695/45355.pdf
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Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery ArchiMer
Mouchet, Maud; Poirson, Manon; Morandeau, Fabien; Vogel, Camille; Méhault, Sonia; Kopp, Dorothee.
Improving the selectivity of a fishing gear is one technical management measure to significantly reduce by-catch of non-commercial species or undersized individuals. The efficiency of selective device is mainly estimated by comparing species composition, the biomass and length spectrum of caught individuals and escapees while the functional traits of species are rarely accounted for. Using an innovative technical device to reduce catches of undersized individuals in a multispecific bottom trawl fishery in the Bay of Biscay, namely a T90 mesh cylinder, we measured functional traits on both caught and escaped individuals of 18 species. Using a Principal Component Analysis and K-means partitioning, we clustered species into 6 groups illustrating 6 different...
Tipo: Text
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00512/62330/66588.pdf
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Validation du TED et essais d'une nouvelle grille sélective dans la pêcherie crevettière de Guyane2007 ArchiMer
Meillat, Marc; Morandeau, Fabien; Achoun, Joseph; Barthelemy, Patricia.
This work is in line with the fishing technology section of the DUHAL (Durability of Halieutic activities) action. It aims to reduce the "side" catches associated with shrimp fishing in French Guyana. Shrimp trawling is indeed considered as one of the fishing activities which generates the most waste. The campaign carried out in November/December 2006 had lead to the following conclusions [...]
Tipo: Text Palavras-chave: Bycatch Reducing Device; Radial Escape Section; Duhal; Survey campaign; Shrimp; Selectivity; Grille Nordmore; Mailles carrées; BRD; RES; TED; Duhal; Grille; Campagne à la mer; Crevette; Sélectivité.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/rapport-6683.pdf
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What can be expected of a T90 extension piece to improve selectivity in bottom trawl multispecific fisheries in the Bay of Biscay? ArchiMer
Kopp, Dorothee; Morandeau, Fabien; Mouchet, Maud; Vogel, Camille; Mehault, Sonia.
In the Bay of Biscay, the selective properties of otter trawls have mainly been studied with regard to single species. However, for bottom trawl multispecific fisheries targeting fish, it remains challenging to find a selective device capable of limiting catches of small individuals of several species without commercial losses. The present study focuses on an innovative technical solution to reduce catches of undersized individuals in a multispecies bottom trawl fishery in the Bay of Biscay. We tested a cylinder made of 100-mm diamond meshes turned at 90°, namely T90 inserted in the extension piece. We present the selectivity results obtained for six commercial species. This device allows the escape of small Solea solea, Trachurus trachurus and...
Tipo: Text Palavras-chave: Gear technology; Covered codend; Turned mesh; Escape; Discard ban.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00439/55026/56487.pdf
Registros recuperados: 25
Primeira ... 12 ... Última
 

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