Skip to main content

    Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia

    Request Meeting Document
    Document Number:
    WG-FSA-97/05
    Author(s):
    Everson, I.
    Agenda Item(s)
    Abstract

    Information on natural mortality rates of the mackerel icefish, Champsocephalus gunnari, from the period prior to large scale commercial harvesting is discussed. Methods based on population age structure and growth parameters are used. It is concluded that only in the three earliest years, 195 1, 1964 and 1966, do the data reflect an unexploited population. The best estimate of M from analyses of the data from these seasons is 0.22. It is suggested that large scale fishing was in progress prior to the reported commencement in 1970.

    Top of page

    © Copyright - Commission for the Conservation of Antarctic Marine Living Resources 2021, All rights reserved.

    Site by Eighty Options