Data/hora: 04/06/2024 01:09:18

Provedor de dados: | 5
País: | France
Título: | Étude prospective de l'exploitation des coquillages au large des côtes d'Aquitaine Volet : Ressources et première approche économique
Autores: | Caill-milly, Nathalie; Duclercq, Benoit; Morandeau, Gilles; De Casamajor, Marie-noelle.
Data: | 2006-12
Ano: | 2006
Palavras-chave: | France; North east atlantic; Aquitaine coasts; Fleet; Geographical zones; Sampling; Bivalvia; Shellfish fisheries.
Resumo: | Introduction: With the objective of diversifying current fishing and at the request of professionals in Aquitaine, the Regional Commission of Maritime Fishing and Marine Breeding (CRPMEM) of Aquitaine has started a discussion about the possibilities of opening a shellfishery. In the context of this course of action, and because of the absence of information on the presence and size of the resource, the CRPMEM of Aquitaine asked IFREMER's Halieutic Resources Laboratory of Aquitaine (LRHA) for assistance in acquiring information on the subject. At the same time, a prospective analysis study of the exploitation of shellfish off the coast of Aquitaine—regulation and business section—was performed by the CRPMEM of Aquitaine (Coiffec, 2006).  At that same time, the Regional Management of Maritime Affairs (DRAM) asked the LRHA to consider setting up a study of the stocks of the burrowing type of shellfish in the 0-12 mile zone.  In 2005, 27 trawlers admitted to otter trawl activity in Aquitaine in the zone targeted by the campaign. Their catches are mainly composed of cephalopods (25%), wedge sole (16%), sole (7%), hake (7%), weever (6%) and angler (5%). These ships have several exploitation difficulties (price and fuel consumption, lower yields,...). Converting a few ships for shellfishery would reduce the pressure on these species as well as reduce the risks associated with a single economic activity. No item is available in the previous studies on the presence of listed sites in the southern part of the Gulf of Gascony. Seven target species were specified by the Regional Commission of Maritime Fishing: Pecten maximus, Cerastoderma edule, Callista Chione, Glycymeris glycymeris, Venus mercenaria, Buccinum undatum. In addition, and to specify the species likely to be present, an identification of empty shells was made on the Landes coast. A bibliographic validation from the observed species' distribution areas made it possible to confirm and complete the information gathered in the field. Through surveys of the professional fishermen of Aquitaine's maritime districts, we specified the locations of hypothetical listed sites. To locate the zones to be sampled and define the sampling strategy, available information was collected about the nature of the sea beds between -20 and -80 meters, off the coasts of Aquitaine.  In this context, a prospecting campaign was implemented during the summer of 2006. Its objectives were to determine the species present, their distribution and to compare yields with those obtained about other exploited sectors with the same vessels.  Furthermore, economic scenarios were considered in order to discuss operating methods. They only concern daily results that permit viable exploitation according to assorted shell densities. The corresponding outputs are not given, since the prospecting did not allow us to make an assessment of the total exploitable biomass and thus to have available reference items enabling us to define the output levels likely to be sustainable.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/2006/rapport-2217.pdf
Relação: | http://archimer.ifremer.fr/doc/00000/2217/
Formato: | application/pdf