Catch Pattern for Antarctic krill (Euphausia superba) of Different Commercial Trawls in Similar Times and Overlapping Fishing Grounds

Zhongqiu Wang, Hao Tang, Bent Herrmann, Liuxiong Xu

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Abstract

Antarctic krill (Euphausia superba) is harvested using different design midwater trawls. Knowing the selective properties between trawls is crucial information for the management of the krill resources. This study compared the catch patterns between different commercial krill trawls at similar times and overlapping fishing grounds based on scientific data collected by scientific observers onboard commercial trawlers Long Teng (LT) and Fu Rong Hai (FRH). The results showed significant differences in the length-dependent catch densities and cumulative catch densities of krill between the two trawls. The krill length range in catches from LT's trawl was wider than that of FRH's trawl. Furthermore, the catch would consist of a larger proportion of smaller krill in the LT's trawl. The LT's trawl caught significantly higher proportions of krill below 38 mm than FRH's trawl. Even, the LT's trawl caught substantial numbers of krill
Original languageEnglish
Article number670663
JournalFrontiers in Marine Science
Volume8
Number of pages10
ISSN2296-7745
DOIs
Publication statusPublished - 2021

Keywords

  • Antarctic krill
  • Trawls
  • Length composition
  • Inter-trawler
  • Catch ratio

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