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| Biais, Gerard; Hennache, Cedric; Stephan, Eric; Delamare, Aline. |
| An undulate ray (Raja undulata) tagging survey was carried out from the end of 2011 to mid-2014 in the Bay of Biscay with the partnership of the fishing industry. It demonstrates that the undulate ray can be found all along the French coast from the Loire estuary to the Spanish boarder, forming several isolated units, the more important being likely in the central part of the Bay of Biscay (Pertuis Charentais – Gironde area). Even in this latter limited area, the population is structured in sub-units with a low exchange rate between them. This population structure allowed to estimate abundance by mark-recapture in the Gironde estuary, using a Petersen estimate. The conditions that must be respected for such closed population abundance estimate are... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00241/35251/33768.pdf |
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