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Report of the Seabass (Dicentrarchus labrax) Otolith and Scale Exchange Scheme 2013 ArchiMer
Mahe, Kelig; Sevin, Karine; Moerman, Martine; Holmes, Alison.
The ICES Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) identified the need of a seabass Dicentrarchus labrax) otolith exchange to take place in 2013. It was the second exchange after that’s of 2011. The IFREMER institute coordinated this exchange. A total of 223 fish from the bay of Biscay (ICES area : VIII, N=29), the Eastern English Channel (ICES area : VIId, N=149) and the North Sea (ICES area : IV, N=45) was sampled onboard French research vessels (Gwen-Drez and Thalassa) during 3 international surveys (EVHOE, CGFS and IBTS). The length range of the fish was between 26 and 71 cm, with mean 42.3 cm. For each fish, the Sagittae otoliths and few scales were used to compare the age estimation between the both calcified...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00185/29596/27963.pdf
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Report of the Sole (Solea solea) in the Bay of Biscay Otolith Exchange Scheme 2011 ArchiMer
Mahe, Kelig; Moerman, Martine; Maertens, Ilse; Holmes, Ian; Boiron-leroy, Anne; Elleboode, Romain.
There were an exchange and a workshop in 2002 of the sole in the Bay of Biscay. The Otolith Exchange Scheme 2011 was the second exercise for the sole in the Bay of Biscay. 5 readers participated in this exchange from Belgium (2 readers), from France (2 readers) and from UK England (1 reader). The otolith collection (n=120) came from 3 samples realized at the fishing port of La Cotinière during the month of June in 2010. For each otolith, readers had the images of otolith section before and after staining. This analyse presented the results of 8 readers (5 readings of stained otoliths and 3 readings of unstained otoliths). Mean precision of age estimate for individual fish were Coefficient of Variation (CV) of 4.7% and percent agreement to modal age of...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00063/17420/14943.pdf
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