서해 5도 주변해역의 어류군집 특성에 관한 연구
A study on the characteristics of fish community in the coastal water of the Five West Sea Islands in Korea
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초록
서해5도 연안에 출현하는 어류의 종조성 및 군집의 계절별 변동을 알아보기 위해 2014부터 2015년까지 2월, 5월, 8월, 11월에 난자치어 및 어획 조사를 실시하였으며, 조사기간 동안 출현한 어류는 총 11목 31과 53종의 분류군이 출현하였고, 전체 조사기간 중 어획된 총 개체수는 137,392 ind./㎢, 생체량은 2,720,846.2 g/㎢이었다. 개체수 기준 우점종을 살펴보면, 쉬쉬망둑 (30.3%), 웅어(18.2%), 멸치 (12.3%), 반지(12.2%)였다. 생체량 기준 우점어종은 꼼치(21.3%), 참홍어(18.5%), 멸치(8.3), 홍어(8.1%) 순으로 나타났다. 봉고네트에서 채집된 멸치 어란은 1,748 ind./1,000 ㎥ 미동정 어란은 64,691 ind./1,000 ㎥ 이 출현하였다. 자치어에서는 총 4목 10과 15종의 분류군이 출현하였다. 자치어는 총 2,015 ind./1,000㎥ 출현하였고, 그 중 민태와 흰베도라치가 우점하였다.
Abstract
Species composition and seasonal variations of fish in the Five West Sea Islands in Korea, were investigated by using otter trawls and bongo nets from 2014 to 2015. During the surveyed period using an otter trawl, a total of 53 species, 147,253 ind./km2 and 2,721,296 g/km2 of fish were collected by otter trawls. The individual dominant species were Chaeturichthys stigmatias (30.3%), Coilia nasus (18.2%), Engraulis japonicus (12.3%), and Setipinna tenuifilis (12.2%).Moreover, the biomass dominant species in biomass were Liparis tanakae (21.3%), Beringraja pulchra (18.5%), Engraulis japonicus (8.3%) and Okamejei kenojei (8.1%). Eggs by bongo nets included 1,748 ind./1,000 m3 of Engraulis japonicus and 64,691 ind./1,000 m3 of unidentified species. A total of 15 species and 2,015 ind./1,000 m3 of fish larvae were collected, and the dominant species were Johnius belengerii and Pholis fangi
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