Comparison analysis of krill length compositions from catches obtained by research and commercial midwater trawls

The authors have analyzed the krill size composition in the catches taken by fishing vessels and the RV Atlantida in the local fishing ground within several day to exclude  any influence of krill drift on results obtained. The fishing ground was located in Subarea 48.2 (SSMU SOW). This comparative analysis  clearly demonstrate both the differences in the krill length composition from catches taken by research and commercial trawls, as well as the differences in the krill length composition from catches taken by commercial trawls with different constructions and when using traditional and continuous fishing technology. The most vulnerable to the gear construction and fishing technology is the keeping of recruitment group and adult krill in the catches.