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

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Numéro du document:

WG-EMM-2021/10

Auteur(s):

A. Sytov and D. Kozlov

Soumis par:

Svetlana Kasatkina (Fédération de Russie)

Approuvé par:

Svetlana Kasatkina (Fédération de Russie)

Point(s) de l'ordre du jour

WG-EMM-2021 - 2.4 - WG-EMM advice on the details of the risk analysis for Subarea 48.1, data layers, catch scenarios, updates

Résumé

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.