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    Krill biology and size composition in Subarea 48.1 and 48.2 based on the RV Atlantida survey in 2020

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    Document Number:
    WG-EMM-2021/10
    Author(s):
    A. Sytov and D. Kozlov
    Submitted By:
    Dr Svetlana Kasatkina (Russian Federation)
    Approved By:
    Dr Svetlana Kasatkina (Russian Federation)
    Agenda Item(s)
    WG-EMM-2021 - 2.4 - WG-EMM advice on the details of the risk analysis for Subarea 48.1, data layers, catch scenarios, updates
    Abstract

    The length distribution and biological indicators (weight, sex, maturity phases and nutrition indicators) of Antarctic krill obtained  during the Russian complex survey on the RV "Atlantida" in January-March 2020 are shown. Analysis is based on 179 standard  double oblique tows with research trawl.  The length distribution and biological indicators were analyzed by strata including the South Shetland Islands stratum (SSI), the Bransfield Strait stratum (BS), the Elephant Island and the Joinvile Island strata (EI), the Scotia Sea stratum (SS).   The catch basis was formed by mature and post-spawning krill individuals, females of stage IIIA and IIIE, males of stage-IIIB.