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Variations in species composition of fishes caught by trawl survey in the northwestern East Sea of Russian EEZ and southwestern East Sea of Korean EEZ

러시아측 동해 북서부 해역과 한국측 동해 남서부 해역 트롤 조사에 어획된 어류의 종조성 및 양적변동

  • Received : 2015.07.16
  • Accepted : 2015.08.27
  • Published : 2015.08.31

Abstract

To examine species composition, abundance and biomass of fishes in the northwestern East Sea of Russian EEZ, trawl survey were conducted at 31 sampling stations from 2006 to 2008. Also, trawl survey were conducted at 21 sampling stations in the southwestern East Sea of Korean EEZ from 2006 to 2008. A total of 67 fishes were collected in the northwestern East Sea of Russian EEZ, a total of 39 fishes were collected in the southwestern East Sea of Korean EEZ. Among them, a total of 53 fishes were collected in the northwestern East Sea of Russian EEZ only, and a total of 25 fishes were collected in the southwestern East Sea of Korean EEZ only. Mean abundance per area which caught by trawl survey in the northwestern East Sea ranged from a high of $116,478inds./km^2$ in 2008 to a low of $19,737inds./km^2$ in 2006. And mean abundance per area in the southwestern East Sea ranged from a high of $89,129inds./km^2$ in 2006 to a low of $8,234inds./km^2$ in 2008. Mean biomass per area which caught by trawl survey in the northwestern East Sea ranged from a high of $11,333kg/km^2$ in 2008 to a low of $2,439kg/km^2$ in 2006. And mean biomass per area in the southwestern East Sea ranged from a high of $6,273kg/km^2$ in 2006 to a low of $1,062 kg/km^2$ in 2008. Cluster analysis, based on a Bray-Curtis similarity matrix of fourth root transformed data of number of species and individuals per area, showed division into three different groups by depth in the northwestern and southwestern East Sea.

Keywords

Northwestern East Sea;Southwestern East Sea;Trawl survey;Species composition;Community structure

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Cited by

  1. Variability of Demersal Fishes caught by a Bottom Trawler in the Fishing Ground off Eastern Jeju Island, Korea vol.30, pp.1, 2018, https://doi.org/10.13000/JFMSE.2018.02.30.1.206

Acknowledgement

Supported by : 국립수산과학원