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    A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2013 random stratified trawl survey

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    Número de documento:
    WG-FSA-13/23
    Autor(es):
    D.C. Welsford (Australia)
    Presentado por:
    Sarah Mackey (Secretaría de la CCRVMA)
    Resumen

    The annual Random Stratified Trawl Survey was undertaken in Division 58.5.2 in the vicinity of Heard Island during April 2013. This paper provides a preliminary assessment of mackerel icefish population structure, abundance and yield for the area of Division 58.5.2 to the west of 79° 20’ E using standard CCAMLR methods. A large cohort of fish, estimated to be 3+, dominates the population in both abundance and biomass. Two scenarios for harvest are presented – a typical two year projection of the population, and a projection accounting for the fact that the abundant 3+ year class is likely to be unavailable beyond 2013/14. Under the first scenario, a catch limit of 764 t is recommended for 2013/14 and 571t for 2014/15, while under the second scenario, a catch limit of 1267 t is recommended for 2013/14 and 0 t for 2014/15.