서해연안 해역에 분포하는 부유성 난 및 자치어의 분포특성
Distribution of ichthyoplankton in the West coastal waters of Korea
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서해연안 주변해역에서 2017년 2월부터 10월까지 계절별로 총 4회에 걸쳐 채집된 부유성 난과 자치어의 분포에 대해 연구하였다. 연구기간 동안 채집된 부유성 난은 총 2개의 분류군을 동정하였고, 그 중 멸치(Engraulis japonicus)가 79.52%, 미동정 어란이 20.48%를 차지하였다. 연구기간 동안 자치어는 총 30과 분류군을 형태적, 분자학적으로 동정하였다. 조사 기간동안 가장 우점한 종은 Gobiidae spp. 가 출현하여 48.30%로 우점 하였으며, 다음으로는 멸치가 31.86%으로 우점하여 2종이 전체 출현량의 80.16%로 우점하였다. 월별 종 다양도 지수(H)는 0.625-1.883였고, 균등도 지수는 0.380-0.865으로 나타났으며, 우점도 지수는 0.618-0.920으로 다양도 지수와는 반대 경향을 나타내었다. 풍부도 지수는 0.573-3.189.
Abstract
The ichthyoplanktons were sampled by Bongo net to study the distribution of the eggs and larvae in the West coastal waters of Korea during the study period (February, May, August and October of 2017). Collected fish eggs were divided into Engraulis japonicus and unidentified species. The most dominant species, Engraulis japonicus accounted for 79.52% of the total fish egg, which was followed by unidentified species (20.48%). The total of 36 taxa in fish larvae were identified based on morphological and molecular characteristics. Fish larvae were dominant by Gobiidae species. 48.30% of the total catch in abundance, which was followed by Engraulis japonicus (31.86%). These two taxa composed 80.16% of the total collected fish larvae. The seasonal diversity index of species from the collected fish larvae in the West coastal waters in 2017 was 0.625-1.883 and the evenness index was 0.380-0.865. In addition, dominance index was 0.618-0.920 and richness was 0.573-3.189.
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