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Species composition and seasonal variation of fish assemblages in the western coastal waters of Jeju Island were determined using samples collected by a trammel net, gill net and fish pot in 2008. During the survey period, a total of 81 species (45 families and 13 orders) of fishes were identified, ...

Species composition and seasonal variation of fish assemblages in the western coastal waters of Jeju Island were determined using samples collected by a trammel net, gill net and fish pot in 2008. During the survey period, a total of 81 species (45 families and 13 orders) of fishes were identified, and Perciformes and Scorpaeniformes accounted for 69.1% of the total number. The number of species was higher in warm months than in cold months, showing a peak in July at 54 species and a low in April at 42 species. The number of individuals and the biomass peaked in September at 895 inds. and 135 kg, and were lowest in December at 450 inds. and 52 kg. The diversity indices of fish catches in trammel net and fish pot were 2.88~3.22 and 1.31~1.87, respectively, and were highest in September. Sebastiscus marmoratus, Stephanolepis cirrhifer, Choerodon azurio and Pseudolabrus sieboldi were dominant species, which occurred abundantly during the entire survey period.

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