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    A preliminary assessment for mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2023 random stratified trawl survey

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    Document Number:
    WG-FSA-2023/10
    Author(s):
    Maschette, D.
    Submitted By:
    Mr Dale Maschette (Australia)
    Approved By:
    Dr Philippe Ziegler (Australia)
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    Agenda Item(s)
    WG-FSA-2023 - 4.2.1 - Champsocephalus gunnari in Division 58.5.2
    Abstract

    The annual random stratified trawl survey was undertaken in Division 58.5.2 in the vicinity of Heard Island and McDonald Islands during March/April 2023. Based on data from this survey, this paper provides a preliminary assessment for mackerel icefish (Champsocephalus gunnari) population structure, abundance and yield in Division 58.5.2 using standard CCAMLR methods (CMIX and Generalized Yield Model).

    The 2023 survey showed a large 3+ cohort in the population and a high biomass. Based on the Grym implementation, catches of 714 t in the 2023/24 season and 599 t in the 2024/25 season satisfy the CCAMLR decision rules.