Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Fish Assemblages by SCUBA Observations in the Water off Tongyeong, Korea

잠수관찰을 통한 경남 통영 연안의 어류상

  • Gwak, Woo-Seok (Marine Bio-Education and Research Center, Gyeongsang National University) ;
  • Lee, Seung-Hwan (Marine Bio-Education and Research Center, Gyeongsang National University) ;
  • Lee, Yong-Deuk (Marine Bio-Education and Research Center, Gyeongsang National University)
  • 곽우석 (국립경상대학교 해양생명과학과 해양생물교육연구센터) ;
  • 이승환 (국립경상대학교 해양생명과학과 해양생물교육연구센터) ;
  • 이용득 (국립경상대학교 해양생명과학과 해양생물교육연구센터)
  • Received : 2016.04.10
  • Accepted : 2016.06.25
  • Published : 2016.06.30
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Abstract

Species composition and distribution characteristics of fish were determined by monthly underwater visual census from September. 2013 to August, 2014 at Yeongunri off Tongyeong, Korea. The study area was divided into five habitat types by depth and substrate: (1) sand bottom as depth of 0~2 m, (2) seagrass bed of 2~5 m, (3) rocky outcrop of 0~2 m, (4) rocky bottom of 2~5 m, (5) sandy mud bottom of 5~8 m. A total of 1,673 individuals belonging to 43 species in 26 families were recorded during the study period. The number of species tended to decrease after October, 2013 and increase from March, 2014 showing the highest number in October (autumn), and lowest in January (winter). In terms of the number of species, Gobiidae was the most dominant family (7 species), followed by Scorpaenidae (4 species). Embiotocidae was the most abundant (26.1% in total number of individuals), followed by Scorpaenidae (19.9%) and Gobiidae (19.3%). The dominant species were Sebastes inermis (19.2%), Ditrema temminckii (13.1%), and Neoditrema ransonnetii (12.9%). The number of species and abundance were relatively high at the depth between 2 and 5 m on seagrass bed and rocky bottom, whereas they were lower at the depth between 0 and 2 m on the sand bottom, suggesting that seagrass beds and rocky bottoms provided the diverse habitats for various fish species in this sea.

경남 통영 영운리 연안에서 어류상 및 분포특성을 밝히기 위해 2013년 9월부터 2014년 8월까지 매월 잠수관찰을 실시하였다. 조사 지역은 수심과 저질에 따라 5개의 서식지로 분류하였다; (1) 수심 0~2 m의 사질지역, (2) 수심 2~5 m의 잘피밭, (3) 수심 0~2 m의 암반 노출지역, (4) 수심 2~5 m의 암반지역, (5) 수심 5~8 m의 펄질 지역. 조사 기간 동안 총 26과 43종 1,673개체의 어류가 관찰되었다. 출현 종수는 3월부터 증가하기 시작하여 10월, 11월에 가장 많았고 이후 12월에 감소하여 1월에 가장 적었다. 망둑어과는 7종이 출현하여 출현 종수에서 가장 많았고 다음으로 양볼락과가 4종 출현하였다. 개체수에서는 망상어과가 총 개체수의 26.1%로 가장 많았고, 다음으로는 양볼락과 19.9%, 망둑어과 19.3%였다. 우점종은 볼락 (Sebastes inermis)이며, 아우점 종으로는 망상어 (Ditrema temminckii)와 인상어 (Neoditrema ransonnetii)였다. 어류의 종수와 개체수는 수심 2~5 m의 잘피밭과 암반지역에서 가장 많았고 수심 0~2 m의 사질지역에서 가장 적었는데 이는 어류가 잘피밭과 암반지역을 서식지로 선호한다고 할 수 있다.

Keywords

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