Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Seasonal Variation in Fish Species Composition in the Eelgrass Bed of Yeocha on Hansando Island, Tongyeong-si, Southern Korea

경남 통영 한산도 여차 잘피밭에 서식하는 어류의 계절 변화

  • Park, Sae-Woong (Marine Bio-Education and Research Center, Gyeongsang National University) ;
  • Kim, Jun-Sop (Ocean & Fisheries Science Institute) ;
  • Lee, Yong-Deuk (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Gwak, Woo-Seok (Marine Bio-Education and Research Center, Gyeongsang National University)
  • 박세웅 (경상국립대학교 해양과학대학 해양생물교육연구센터) ;
  • 김준섭 (전라남도 해양수산과학원) ;
  • 이용득 (국립수산과학원 수산자원연구센터) ;
  • 곽우석 (경상국립대학교 해양과학대학 해양생물교육연구센터)
  • Received : 2021.02.10
  • Accepted : 2021.03.11
  • Published : 2021.03.31
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Abstract

This study aimed to determine the monthly fish species composition in the eelgrass bed of Yeocha on Hansando Island, Korea, and to obtain fish species data by comparison with the nearby Bongam. The species composition was determined from monthly samples collected by a surf net from August 2009 to July 2010. During the survey, total 2,394 individuals of 29 species and 10,378 g of fish were collected. The dominant species were Gymnogobius heptacanthus, followed by Takifugu niphobles, Rudarius ercodes, Chaenogobius annularis, and Ditrema temminckii, accounting for 89% of the total individuals sampled and 83% of the fish biomass collected. The fish assemblages in the eelgrass bed varied seasonally; the number of individual fishes increased in May and was highest in July, whereas the biomass attained its highest level in April and subsequently decreased. This study confirms that the seagrass bed plays an important role as a fish nursery ground, and it is necessary to investigate changes in the coastal fishes of the southern coast via periodic surveys.

이 연구는 한산도 여차 잘피밭의 어류상 조사를 통해 월간 출현 어종을 알아보고 인근의 봉암 조사 결과와 비교하고자 하였다. 조사는 2009년 8월부터 2010년 7월까지 지인망을 이용해 수행하였고, 조사 기간 동안 총 29종 2,394개체, 10,378 g의 어류가 채집되었다. 우점종은 살망둑이었으며, 다음으로는 복섬, 그물코쥐치, 점망둑, 망상어 순이었고, 이들 6종이 총 개체수의 89%, 생체량의 83%를 차지하였다. 잘피밭에서의 어류 종조성은 계절에 따른 변화가 뚜렷했으며, 개체수는 5월에 증가하기 시작하여 7월에 가장 많았고, 생체량은 4월에 최고값을 나타낸 후 지속적으로 감소하였다. 이번 조사에서 월별 개체수와 생체량 변동 및 타 논문과의 비교를 통하여 여차 잘피밭이 어류의 성육장으로서 중요한 역할을 하고 있는 것을 확인할 수 있었다. 따라서, 앞으로도 잘피밭에 서식하는 어류에 대한 주기적인 조사를 통해 남해안 연안 어류상 변화에 대비한 자료를 확보할 필요성이 있을 것으로 판단된다.

Keywords

Acknowledgement

이번 연구를 위한 조사에 적극 참여해준 경상국립대학교 해양과학대학 어류학연구실 졸업생 이대희, 한동훈, 이헌종 님에게 감사드립니다.

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