Journal of Fisheries and Marine Sciences Education (수산해양교육연구)

The Korean Society for Fisheries and Marine Sciences Education (한국수산해양교육학회)
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Seasonal Fluctuation in Abundance and Species Composition of Fishes in Sorido Island of Yeosu Coast, Korea

여수 소리도 주변해역에서 채집되는 어류의 종조성 및 군집구조

  • Received : 2017.01.23
  • Accepted : 2017.04.10
  • Published : 2017.06.30
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Abstract

The Fluctuation in the abundance and species composition of fish was investigated Sorido Island southern, Korea from August, 1999 to May, 2000. A total of 1,920.6 fishes were sampled and classified into 9 orders, 34 families, and 39 species. The dominant orders were Perciformes including 15 famailies and 17 species, followed by Pleuronectiformes including 5 families and 6 species, Scorpaeniformes including 4 families and 6 species Ilisha elongata was the dominant occupying 23.96%, followed by Scomber japonicus 16.27%, and Engraulis japonicus 10.98%. Year-round species dominant occupying Conger myriaster, Ilisha elongata, Platycephalus indicus, Leiognathus nuchalis. Seasonal species occupying Hapalogenys mucronatus, Uranoscopus japonicus, Citharoides macrolepidotus. The monthly diversity, evenness, and Richness index were 1.970~2.528, 0.669~0.759, 2.747~4.729, respectively.

소리도 주변해역에서 어류의 종조성을 파악하기 위하여 1999년 8월과 10월, 2000년 2월과 5월에 총 4회에 걸쳐 조사하였으며, 소형 Trawl 어망을 5톤급 어선으로 30분간 예인하였고 소리도 주변해역에 서식하고 있는 어류의 종조성은 총 9목 34과 36속 39종 1920.6개체/$1,000m^3$가 출현하였고 그 중 준치가 460.2개체/$1,000m^3$로 23.96%를 차지하여 가장 많은 개체수가 출현하였으며, 다음으로 고등어가 312.4개체/$1,000m^3$로 16.27%, 멸치가 210.9개체/$1,000m^3$로 10.98% 순으로 출현하였다. 주요 어종의 출현빈도 조사 결과, 연중 출현한 어종은 붕장어, 준치, 양태, 주둥치, 베도라치 실망둑 등으로 소리도 연안의 정착성 어종이였고, 특정 계절에만 출현한 어종은 군평선이와 얼룩통 구멍은 봄철에만 출현하였으며, 풀넙치는 여름에만 출현하였고, 돌돔, 고등어 그리고 삼치는 가을에만 출현하였다. 군집분석을 분석한 결과 종 다양도지수는 1.970~2.528, 풍부도지수는 2.747~4.729, 균등도지수는 0.669~0.759, 우점도지수는 0.455~0.576로 나타났다. 계절별 군집의 유사도는 봄철과 겨울철이 0.0043로 가장 작아 군집상이 매우 유사하였으며, 여름철과 겨울철에는 우점종과 출현종이 유사하지 않아 상대거리차가 0.10135로 군집상에 차이가 가장 컸다.

Keywords

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