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    A preliminary assessment for mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2025 random stratified trawl survey

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    Document Number:
    WG-FSA-2025/17
    Author(s):
    Maschette, D. and P. Ziegler
    Submitted By:
    Dr Philippe Ziegler (Australia)
    Approved By:
    Dr Philippe Ziegler (Australia)
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    Agenda Item(s)
    WG-FSA-2025 - 3 - Icefish
    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 2025. 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 Grym).
    The 2025 survey showed a large 3+ cohort in the population and a high biomass. Based on the Grym implementation, catches of 1 429 t in the 2025/26 season and 1 126 t in the 2026/27 season satisfy the CCAMLR decision rules.