한국수산과학회

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kfas, vol. 54, no. 4, pp.498-507, August, 2021
DOI. https://doi.org/10.5657/KFAS.2021.0498

Species Composition of Ichthyoplankton off Dokdo in the East Sea 독도 주변해역 부유성 어란과 자치어의 종조성

신의철·윤석진*·김진구1 ·최광호
국립수산과학원 독도수산연구센터, 1 부경대학교 자원생물학과

Ichthyoplankton (fish eggs and larvae) were collected seasonally collected from 2017 to 2019 to clarify whether Dokdo serves as a fish spawning and/or nursery ground. Fish eggs were identified and classified into 16 species. The dominant fish egg species were Engraulis japonicus, Maurolicus japonicus, and Parajulis poecilepterus. Fish larvae were identified and classified into 15 species. The dominant fish larvae species were E. japonicus, M. japonicus, and Sebastes owstoni. A cluster analysis similarity percentages revealed two distinct groupings according to sample location (stations) with E. japonicus and M. japonicus as the main group influencers. E. japonicus was the dominant species off Dokdo. The species diversity and abundance peaked in summer. The diversity index, richness index, and evenness index fluctuated seasonally. There were no predominant species variations among the years. Sedentary species such as P. poecilepterus, Semicossyphus reticulatus, and Glyptocephalus stelleri occurred in the inshore stations. E. japonicus, M. japonicus, and Trachipterus trachypterus occurred in the offshore stations. Our results show these species use Dokdo as spawning and nursery grounds.

Keyword : Ichthyoplankton, Species composition, Dokdo, East Sea

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