Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Seasonal Variation of Species Composition of Fishes Collected by Set Net in Coastal Waters of Ulsan, Korea

울산연안 定置網에 어획된 漁類 의 종조성 및 양적변동

김종헌;백승록;한경호

  • Published : 20020000
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Abstract

Fishes were collected by set net to determine seasonal species composition and fluctuation in abundance in coastal waters of Ulsan, Korea, in February, April, June, August and December, 1998. A total of 62,978 fishes (6,494 kg) were sampled and classified into 12 orders, 45 families and 89 species. The most dominant orders were Perciformes and Scorpaeniformes, which accounted for 62.9% of the total. The most dominant families were Carangidae and Tetraodontidae, each represented seven species. The most dominant species were Scomber japonicus, Trachurus japonicus, Engraulis japonicus and Thamnaconus modestus, which accounted for 89.7% of the total fishes collected. The most dominant in biomass were Scomber japonicus, Trachurus japonicus, Cololabis saira, Thamnaconus modestus, Konosirus punctatus, Sphyraena pinguis, Engraulis japonicus, Sardinops melanostictus, Pleurogrammus azonus and Pampus echinogaster. Those species together accounted for 95.5% of the total biomass. The number of individuals and the biomass were much higher in summer than in spring and winter, and closely correlated with water temperature. The number of species showed a peak in August, with 46 species, and the lowest number in February, with 30 species. The diversity index was the highest in April (H′ = 2.146) and the lowest in August (H′ = 0.693).

Fishes were collected by set net to determine seasonal species composition and fluctuation in abundance in coastal waters of Ulsan, Korea, in February, April, June, August and December,1998.A total of 62,978 fishes (6,494 kg) were sampled and classified into 12 orders, 45 families and 89 species. The most dominant orders were Perciformes and Scorpaeniformes, which accounted for 62.9% of the total. The most dominant families were Carangidae and Tetraodontidae, each represented seven species. The most dominant species were Scomber japonicus, Trachurus japonicus, Engraulis japonicus and Thamnaconus modestus, which accounted for 89.7% of the total fishes collected. The most dominant in biomass were Scomber japonicus, Trachurus japonicus, Cololabis saira, Thamnaconus modestus, Konosirus punctatus, Sphyraena pinguis, Engraulis japonicus,Sardinops melanostictus, Pleurogrammus azonus and Pampus echinogaster. Those species together accounted for 95.5% of the total biomass.The number of individuals and the biomass were much higher in summer than in spring and winter, and closely correlated with water temperature. The number of species showed a peak in August, with 46 species, and the lowest number in February, with 30 species. The diversity index was the highest in April (H′ = 2.146) and the lowest in August (H′ = 0.693).

Keywords

References

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