Modelling of the Cockle (Cerastoderma edule L.) fishing grounds in a purpose of sustainable management of traditional harvesting - Equipe E-COS Accéder directement au contenu
Article Dans Une Revue Fisheries Science Année : 2009

Modelling of the Cockle (Cerastoderma edule L.) fishing grounds in a purpose of sustainable management of traditional harvesting

Résumé

n the Bay of Saint-Brieuc, a 3,110-ha tidal bay in NW France, English Channel, the cockle Cerastoderma edule has been collected by traditional fishing methods for many decades without any evaluation or management of this resource taking place. Since 2001, the National Natural Reserve of the bay of Saint-Brieuc has carried out an evaluation of the stock and a mapping of the cockle fishing grounds each year. Analysis of the spatial structure of the population is approached by cartography through interpolation of the data using the kriging method. The recruitment zones are geographically quite well defined and located in areas limited to the mean-tide zone. The distribution of the population was affected by passive displacement of juvenile cockles. Evaluation using the matrix of individual numbers for each age group found the inter-annual mortality rates to be about 60%. Somatic production was estimated and expressed in ash-free dry weight. The average annual production ranged from 7.4 to 14.5 g/m². In the autumn of 2006, the minimum legal fishing size changed from 30 to 27 mm (corresponding to individuals aged about 2.5 years). The model developed shows that this change has led to a doubling of the fishable stock.
Fichier principal
Vignette du fichier
Ponsero_al-2009-Cockle.pdf (615.98 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00439615 , version 1 (08-12-2009)

Identifiants

  • HAL Id : hal-00439615 , version 1

Citer

Alain Ponsero, Laurent Dabouineau, Allain Jérémy. Modelling of the Cockle (Cerastoderma edule L.) fishing grounds in a purpose of sustainable management of traditional harvesting. Fisheries Science, 2009, 75 (4), pp.839-850. ⟨hal-00439615⟩
79 Consultations
318 Téléchargements

Partager

Gmail Mastodon Facebook X LinkedIn More