Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Seasonal Variations in Abundance and Species Composition of Fishes in an Eelgrass Bed in Myoungjuri of Jindong Bay

진동만 명주리 잘피밭에 서식하는 어류의 종조성 및 계절변동

  • Baeck, Gun Wook (Korea Inter-university Institutes of Ocean Science, Pukyong National University) ;
  • Kwak, Seok Nam (Korea Inter-university Institutes of Ocean Science, Pukyong National University) ;
  • Huh, Sung-Hoi (Department of Oceanography, Pukyong National University)
  • 백근욱 (부경대학교 해양과학공동연구소) ;
  • 곽석남 (부경대학교 해양과학공동연구소) ;
  • 허성회 (부경대학교 해양학과)
  • Received : 2004.10.15
  • Accepted : 2005.01.05
  • Published : 2005.03.31
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Abstract

A total of 33 fish species were collected by a small beam trawl from an eelgrass bed in Myoungjuri of Jindong Bay, Korea. The dominant fish species were Hexagrammos otakii, Pholis fangi, Repomucenus valenciennei, Pseudoblennus cottoides, Pholis nebulosa, Rudarius ercodes, Syngnathus schlegeli, and Sebastes schlegeli. These 8 fish species accounted for 79.5% of the total number of individuals collected. The fishes collected in the study area were primarily small fish species or juveniles of large fish species. Seasonal variations in both species composition and abundance were large; higher numbers of fish occurred from April to June 2002, while biomass was the highest in September 2001 and 2002. Seasonal changes in fish abundance corresponded with eelgrass biomass and abundance of food organisms.

진동만 명주리 잘피밭에 서식하는 어류의 종조성 및 계절변동을 조사하기 위해서 2001년 8월 부터 2003년 7월까지 소형 비임트롤을 이용하여 어류를 매월 채집하였다. 조사기간 동안 어류는 총 33종이 채집되었다. 쥐노래미, 흰베도라치, 실양태, 가시망둑, 베도라치, 그물코쥐치, 실고기, 그리고 조피볼락이 많이 채집되었는데, 이들은 채집된 총 개체수의 79.5%를 차지하였다. 본 조사해역에서 채집된 어류는 대부분이 평균 15 cm 이하의 소형 어종이거나 대형 어종의 유어들로 구성되어 있었다. 잘피밭 어류군집은 뚜렷한 계절변동을 보였는데, 채집 개체수는 2002년 4월에서 6월 사이에 아주 높았으나, 생체량은 2001년과 2002년 9월에 각각 가장 높은 수치를 나타내었다. 대체적으로 겨울철에서는 채집 개체수 및 생체량이 모두 낮았다. 어류 군집의 계절변동은 잘피의현존량 및 먹이생물의 양적변동과 관계가 있었다.

Keywords

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