Aller au contenu principal

    A re-analysis of the Kerguelen Shelf and Skiff Bank stocks of Champsocephalus gunnari

    Demander un document de réunion
    Numéro du document:
    WG-FSA-90/17
    Auteur(s):
    G. Duhamel (France) and D.J. Agnew (Secretariat)
    Approuvé par:
    Admin Admin
    Point(s) de l'ordre du jour
    Résumé

    Catches of Champsocephalus gunnari from the Kerguelen Shelf and Skiff Bank stocks were re-calculated from those used by the Working Group on Fish Stock Assessment in 1989 using length-frequency data for the years 1981 to 1990. Cohort analysis yielded a Stock Biomass of 22 711 tonnes in 1988 for the Age 2 Kerguelen Shelf stock, an order of magnitude lower than that calculated from a biomass survey in 1988 by the USSR. This biomass is consistent with that from previous cohorts and indicates a possible declining trend in the abundance of this stock.