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    Developing plausible estimates of subarea and fished area biomasses

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    Numéro du document:
    WG-ASAM-2021/14
    Auteur(s):
    B.A. Krafft, G. Macaulay, S. Fielding and P.N. Trathan
    Soumis par:
    Philip Trathan (Oceanites)
    Approuvé par:
    Chris Darby (Royaume-Uni)
    Point(s) de l'ordre du jour
    Résumé

    In this paper we present krill density biomass estimates for Subareas 48.1, 48.2, 48.3 and 48.4 and for current fished areas, using post-hoc stratification of krill density estimates from the 2019 International Krill Survey. We highlight the importance of survey strata design for the differing areas, with implications for management. Each level of stratification requires different extrapolations from survey area to stratum area.