Kulbicki Michel, Wantiez Laurent. (1990). Variations in the fish catch composition in the Bay of St Vincent, New Caledonia, as determined by experimental trawling. Australian Journal of Marine and Freshwater Research, 41, p. 121-144.
Titre du document
Variations in the fish catch composition in the Bay of St Vincent, New Caledonia, as determined by experimental trawling
Année de publication
1990
Type de document
Article
Auteurs
Kulbicki Michel, Wantiez Laurent
Source
Australian Journal of Marine and Freshwater Research, 1990,
41, p. 121-144
An experimental trawl survey was conducted in the Bay of St Vincent between December 1984 and April. In all, 85 hauls were performed during cruises. The trawled fish represented 233 species and 59 families. Biomass and density estimates declined 13-fold between the first and last cruises. This decline is not due to the survey catch (less than 2 % of the biomass of the bay), nor is it likely to be due to trawling-induced changes in habitat. Natural causes are the most likely reason for the decline. the r-type species (Leiognathidae, Lethrinus nematacanthus) had the largest population fluctuations, whilst longer living and later reproducing species (Saurida undosquamis, large Upeneus spp.) had the smallest. Trophic structure is studied using three expressions : number of species, biomass and density per trophic group. Number of species per trophic group was the most insensitive to changes in time and place, with density being the most sensitive. Study of the variations in trophic structure could help with the monitoring of major changes in fish populations caused by fishing or environnmental changes. (Résumé d'auteur)
Plan de classement
Synécologie [036MILMAR02]
;
Stocks [040PECHE03]
Descripteurs
PECHE EXPERIMENTALE ; CHALUTAGE ; POISSON MARIN ; STRUCTURE TROPHIQUE ; BIOMASSE ; DENSITE DE POPULATION ; ESPECE COMMERCIALE
