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    Results from a three-year survey, 2017–2019, into the connectivity of toothfish species in Subareas 48.2 and 48.4

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    Document Number:
    WG-FSA-2021/22
    Author(s):
    M. Söffker, O. Hogg, P. Hollyman, M. Belchier, A. Riley, L. Readdy, E. MacLeod, G. Robson, K. Olsson, H. Pontalier and C. Darby
    Submitted By:
    Dr Timothy Earl
    Approved By:
    Dr Chris Darby
    Accessibility Categories
    Request permission to release each time (RP)
    Agenda Item(s)
    WG-FSA-2021 - 7 - Other business
    Abstract

    This paper presents the results from a three-year longline fishing research survey (2017 - 2019), conducted to improve understanding of Dissostichus spp. population connectivity, biological characteristics and spatial structure across CCAMLR Subareas 48.2 and 48.4. The results provide evidence linking D. mawsoni with the Antarctic continental shelf and indicate a potential D. mawsoni spawning region in Subarea 48.2. The movements of recaptured tagged fish indicate potential connections with the Lazarev Sea (Subarea 48.6) as well as the southern South Sandwich Islands. The results contribute to the information available for further refinement of the D. mawsoni stock hypothesis.