Data/hora: 01/06/2024 01:12:37

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Estimation d'un stock naturel de coquilles Saint-Jacques par une méthode combinant les dragages et la plongée. Traitement des résultats par une méthode géostatistique
Autores: | Buestel, Dominique; Dao, Jean-claude; Gohin, Francis.
Data: | 1985
Ano: | 1985
Palavras-chave: | Estimation stock; Coquille Saint Jacques; Dragage; Saint-Brieuc; Méthode géostatistique; Bretagne.
Resumo: | The efficiency of the scallop dredge used in baie de St Brieuc (Britany) has been directly determined by divers swimming along the track marks left on the bottom. Results, concerning essentially year class two, show that efficiency and damage caused by the dredge on scallops are highly variable according to nature of the sea bed. On smooth grounds, the average efficiency is 67% and the average percentage for severely damged scallops is 2% ; on rough grounds, theses percentages are respectively 30% and 17%. These results associated with a dredge survey on a particular area of the baie de St Brieuc allow an assessment of scallops abundance. The statistical method used, relevant to the geostatistic theory, takes into account the scallop spatial distribution as it apperas from a regular grid pattern of stations for calculating a valid estimate of the overall sampling variance. Total amount of scallops on the sampled area (33.3 . 10(6) square meters) was 2550 tons (standard deviation : 407), giving an average density of 0.6 scallop per square meter.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/00009/12001/8695.pdf
Editor: | Communication Congrès International pour l'Exploration de la Mer, Comité pour la capture des animaux marins. CM 1985 N° K:18
Relação: | http://archimer.ifremer.fr/doc/00009/12001/
Formato: | application/pdf