• Title/Summary/Keyword: Siganus fuscescens

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Assessment of Fish Fauna in the Coastal Waters off Busan and Ulsan, Southwestern Korea Using the Underwater Visual Census (과학잠수관찰을 통한 우리나라 부산, 울산 연안의 어류상)

  • Lee, Yong-Deuk;Lee, Gang-Min;Gwak, Woo-Seok
    • Korean Journal of Ichthyology
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    • v.34 no.1
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    • pp.44-56
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    • 2022
  • Fish fauna was observed off the coast of Busan (Cheongsapo) and Ulsan (Bangeojin) using underwater visual census from November 2016 to October 2017. A total of 1,486 individuals of 25 species in Cheongsapo and 3,859 individuals of 31 species were identified in Bangeojin. Dominant species in the number of individuals were Trachurus japonicus (20.9%), Halichoeres tenuispinis (12.6%), and Chromis notata (11.9%) in Cheongsapo, Siganus fuscescens (42.0%), Pempheris japonica (8.4%), and Chromis notata (8.0%) in Bangeojin. There was no significant difference in the species composition of Cheongsapo and Bangeojin but spring vs. summer, spring vs. autumn, summer vs. winter, autumn vs. winter showed a significant difference. Contribution species of seasonal differences were commonly high rates by Halichoeres tenuispinis and Parajulis poecilepterus. Of the total 38 species, 17 (44.7%) temperate, 6 (15.8%) tropical, and 15 (39.5%) subtropical species observed coastal waters off Cheongsapo and Bangeojin.

Species Occurrence and Food Chain of Fisheries Resources, Nekton, on the Coast of Pukchon, Cheju Island 1. Species composition and diversity (제주도 북촌연안 수산자원유영생물의 출현과 먹이연쇄에 관한 연구 1. 종조성과 다양도)

  • GO You-Bong;SHIN Heau-Sub
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.21 no.3
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    • pp.131-138
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    • 1988
  • Collection of organisms for the fisheries resources community were obtained with a set net during 8 months between May, 1985 and May, 1986 on the coast of Pukchon, Cheju Island, Korea. Most of organisms, representing 36 species, were less than 20cm $(93\%)$ in length, and 130g $(91\%)$ in weight. The four most abundant species were jack mackerel, Trachurus japonicus ; squid, Todarodes pacificus : damsel fish, Chromis notatus : and rabbit fish, Siganus fuscescens, which comprised about $83\% in number and about $73\%$ of the total catch. The diversity index of the number of species and information indices for individual and catch were the highest in October and the lowest in Septemer, indicating a close relationship with the change between the species number and catch at that time. A cluster analysis of 17 species was illustrated from the similarity matrix. All of the 17 species were grouped at the 0.2 similarity level. Three groups were present at 0.60 level, whereas species in other groups were sporadic in occurrence.

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