Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Species Composition and Seasonal Variation of Fish Assemblage in the Coastal Water off Gadeok-do, Korea -3. Fishes Collected by Crab Pots-

가덕도 주변 해역 어류의 종조성과 계절 변동 -3. 꽃게통발에 의해 채집된 어류-

  • An Yong Rock (Department of Oceanography, Pukyong National University) ;
  • Huh Sung Hoi (Department of Oceanography, Pukyong National University)
  • Published : 2002.11.01
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Abstract

The monthly collected fish samples by crab pots were analyzed in order to study the species composition and seasonal variation of fish assemblage in the coastal water off Gadeok-do, Korea in 1998, During the study period, 49 species of fishes representing 26 families were collected, The dominant species were Conger myriaster, Sebastes inermis, Hexagrammos otakii, H. agrammus, Stephanolepis cirrhifer and Acanthogobius flavimanus. These 6 dominant species accounted for $67.1\%$ and $69.4\%$ in the number of individuals and biomass, respectively. The secondary importance species were Thamnaconus modestus, Takifugu niphobles, Rudarius ercodes, Dictyosoma burgeri, Sebastes longispinis and Epinephelus septemfasciatus. The highest number of species was collected in November, and the number of individuals and biomass were highest in March. But the lowest numbers of species and individuals were collected in July and the lowest biomass in September, Although the species diversity indices varied little monthly, the lowest value was recorded in August because of small number of species and predominance of 5. cirrhifer and T. modestus.

가덕도 주변 해역에 서식하는 어류의 종조성과 계절 변동을 알아보기 위해 꽃게통발을 이용하여 어류를 채집하였다. 1998년 1월부터 12월까지 매월 소조기에 채집된 어류는 26과 49종이었다. 붕장어 (Conger myriaster)가 가장 많이 채집되었으며, 그 다음으로 볼락 (Sebastes inermis), 쥐노래미 (Hexagrammos otakii), 노래미(H. agrammus), 쥐치 (Stephanolepis cirrhifer), 문절망둑 (Acanthogobius flavimanus) 등이 많이 채집되었는데, 이들 6종이 전체채집 개체수와 생체량의 $67.1\%$와 $69.4\%$를 차지하였다. 그 밖에도 말쥐치 (Thamnaconus modestus), 복섬 (Takifugu niphobles), 그물코쥐치 (Rudarisu ercodes), 그물베도라치 (Dictyosoma burgeri), 횐꼬리볼락 (Sebastes longispinis), 능성어 (Epinephelus septemfasciatus) 등이 비교적 많이 채집되었다. 채집 종수는 11월에 28종으로 가장 많았고, 7월에 14종으로 가장 적었다. 개체수와 생체량은 모두 3월에 가장 높은 값을 보였으며, 개체수는 7월에 생체량은 9월에 가장 낮은 값을 나타냈다. 종다양도지수는 연중 큰 변동이 없는 편이었으나, 채집 어종수가 적고 쥐치와 말쥐치가 극우점하였던 8월에 가장 낮은 값을 보였다.

Keywords

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