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

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 tim...

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Bibliographic Details
Published in:Frontiers in Marine Science
Main Authors: Wang, Zhongqiu, Tang, Hao, Herrmann, Bent, Xu, Liuxiong
Format: Article in Journal/Newspaper
Language:English
Published: 2021
Subjects:
Antarctic krill
Trawls
Length composition
Inter-trawler
Catch ratio
Antarc*
Antarctic
Antarctic Krill
Euphausia superba
Online Access:https://orbit.dtu.dk/en/publications/80680070-f424-476a-b8bd-4c909ac62ecc
https://doi.org/10.3389/fmars.2021.670663
https://backend.orbit.dtu.dk/ws/files/258981241/fmars_08_670663.pdf
Description
Summary: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

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