여수 돌산연안 낭장망에 어획된 어류의 종조성 및 계절변동
Fluctuations in abundance and species composition of fishes collected by Gape net in the Dolsan, Yeosu
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초록
이 연구는 전라남도 돌산연안에서 2015년 7월부터 2016년 7월까지 낭장망을 이용하여 어획되는 어류의 종조성 및 계절변동에 관하여 연구하였다. 채집된 어류는 총 30목 42과 53종 1,331개체가 출현하였고, 이 중 농어목(Perciformes)이 21과 24종으로 가장 많았고,다음으로는 쏨뱅이목(Scorpaeniformes)이 7과 13종, 청어목(Clupeiformes)이 6과 6종으로 이들 3목이 포함된 어류가 종으로 전체 개체수의 81.1%를 차지하여 가장 우점하는 목들로 나타났으며, 과별로 가장 다양하게 출현한 어류는 가자미목(Pleuronectiformes)가 3종, 뱀장어목(Anguilliformes)가 2종, 숭어목(Mugiliformes)가 1종, 복어목(Teteraodontiformes), 아귀과(Lophiidae)가 각각 1종씩 출현하였다. 조사지역에서 가장 많이 채집된 종은 멸치로 174.1개체로 전체 출현량의 43.5%를 차지하여 돌산 연안에서 가장 우점한 종으로 나타났으며, 다음으로는 보구치가 95.3개체로 23.8% 주둥치가 89.9/㎥개체로 22.4% 순으로 우점 하였다. 월 종조성에 있어서는 10월에는 36종 412.1개체가 출현하였고, 조사기간 중 가장 많은 출현개체수를 보였으며, 전체개체수의 30.9%를 차지하였다. 1월에는 22종 254.5개체가 출현하였으며, 4월에는 37종 332.9개체, 7월에는 29종 331.7개체가 출현하였다. 월별 다양도지수는 1.83~2.90, 균등도지수는 0.76~0.95, 풍부도지수는 3.07~6.40로 나타났다.
Abstract
The fluctuation in the abundance and specie composition of fish was investigated using gape net in Dolsan District of Yeosu Korea from July 2015 to April 2016. A total of 1,331 fishes were sampled and classified into 30 orders, 42 families, and 53 species. The dominant orders are perciformes including 21 famailies and 24 species, followed by scorpaeniformes including 7 families and 13 species, and clueiformes including 6 families and 6 species. Among the 53 fish species collected, Engraulis japonicus was the most frequent specie occupying 43.5%, followed by Argyrosomus argentatus (23.8%), and Leiognathus nuchalis (22.4%). The monthly diversity, evenness, and Richness index were 1.83-2.90, 0.76-0.95 and 3.06-6.40.
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