Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Seasonal Variation in Species Composition of Fish Collected by Trammel Net Around Dokdo, East Sea of Korea

독도 주변해약에서 삼중자망으로 어획한 어류의 종조성 및 계절변동

  • Lee, Hae-Won (Dokdo Fisheries Research Center, National Fisheries Research & Development Institute) ;
  • Hong, Byung-Kyu (Dokdo Fisheries Research Center, National Fisheries Research & Development Institute) ;
  • Sohn, Myong-Ho (Dokdo Fisheries Research Center, National Fisheries Research & Development Institute) ;
  • Chun, Young-Yull (Dokdo Fisheries Research Center, National Fisheries Research & Development Institute) ;
  • Lee, Dong-Woo (Fisheries Resources Research Division, National Fisheries Research & Development Institute) ;
  • Choi, Young-Min (Fisheries Resources Research Division, East Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Hwang, Kang-Seok (Fisheries Resources Research Division, National Fisheries Research & Development Institute)
  • 이해원 (국립수산과학원 독도수산연구센터) ;
  • 홍병규 (국립수산과학원 독도수산연구센터) ;
  • 손명호 (국립수산과학원 독도수산연구센터) ;
  • 전영열 (국립수산과학원 독도수산연구센터) ;
  • 이동우 (국립수산과학원 자원연구과) ;
  • 최영민 (국립수산과학원 동해연구소 자원환경과) ;
  • 황강석 (국립수산과학원 자원연구과)
  • Received : 2010.10.25
  • Accepted : 2010.12.03
  • Published : 2010.12.31
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Abstract

Seasonal variation in species composition around Dokdo, East Sea of Korea, was investigated using trammel-net catches, from 2006 to 2009. A total of 53 fish species belonging to 23 families in 12 orders were captured; the orders Perciformes (12 families, 22 species) and Scorpaeniformes (four families, 22 species) were dominant. Between 2008 and 2009, 43 species were collected by trammel net. The number of species was highest in August 2009 (25 species) and lowest in February 2009 (11 species). The number of individuals and total biomass peaked in November 2009. Diversity indices for fish catches were highest in August 2008 (2.4368) and lowest in November 2009 (0.4253). The dominant species were Thamnaconus modestus and Sebastes schlegeli. Hierarchical clustering analysis showed five fish groups, with frequency and number of individuals similar to results of correspondence analysis (CA), which showed a closer relationship to the year term than the season term. CA showed that temperature was an important factor influencing fish species richness and abundance. Three main fish assemblage types coexisted around Dokdo: an East Sea coastal fish assemblage, a subtropical fish assemblage, and a cold water fish assemblage.

Keywords

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