Data/hora: 11/06/2024 12:30:47

Provedor de dados: | 5
País: | France
Título: | Estimation des stocks de palourdes Ruditapes decussatus, Ruditapes philippinarum sur l'estran oléronais du bassin de Marennes-Oléron. Juin 2009
Autores: | Bordeyne, François; Robert, Stephane; Le Moine, Olivier; Leaute, Jean-pierre.
Data: | 2017
Ano: | 2017
Palavras-chave: | Palourde; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oléron.; Manilla clam; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oleron.
Resumo: | On French coast, Manila clam is a bivalve subject of a large activity recreational and professional hand harvest. Two species are represented in France, European Manila clam Ruditapes decussatus (native) and Japanese Manila clam Ruditapes philippinarum (introduced). Predominance of this last species (more than 90 % of number and biomass), earn them the status of invasive species. Contrary to Arcachon bay, Pont l’Abbé River or Morbihan bay, an estimation campaign of Manila clams stock on Marennes-Oléron bay had never been carried out. The objective of this study: estimate, in number and biomass, the Manila clams stock of two areas. The first affect recreational hand harvest, on Saint-Trojan shore (0.8 km²) whereas the second scopes professional hand harvest, on Bellevue area (0.77 km²). This last one is integrated into the Moëze-Oléron natural reserve. With the Hamon skip unavailable, the usual sampling method couldn’t be used. The samples had been realized on foot, according to the quadrat method. To Saint-Trojan, the Manila clams stock is estimated at 88.7 tones (± 67.3) to 14.56 million (±11.23) of individual. The result to Bellevue is 150.7 tones (± 114.9) to 39.42 million (± 28.66) of individual. The stocks of commercial Manila clams are respectively 18.2 and 53.8 tones. Bellevue, with a commercial Manila clams density of 0.76 t/ha is better than Arcachon bay and Saint-Trojan (0.23 t/ha). Yet, it’s lower than Pont l’Abbé River or Morbihan bay. Analysis of histograms of the size frequency using FISAT II (a FAO method software), was carried to establish the population age structure. The Bellevue Manila clams stock is of great interest to the professional hand harvest whereas to Saint-Trojan, the low level of stock could point out a resource management problem
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00415/52621/53459.pdf

http://archimer.ifremer.fr/doc/00415/52621/

Formato: | application/pdf

Fonte:

2017 Ifremer, Université de Caen

info:eu-repo/semantics/openAccess

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