광양만에서 소형 저인망으로 어획된 어류의 종조성 및 양적 변동

Abstract

Species composition and seasonal variation in Kwangyang bay were investigated 6 times from October, 1999 to August, 2000. The fishes caught by a small otter trawl were identified into 10,017 individuals, 72 species, 61 Genus, 38 families and 9 orders. Perciformes were dominant identified into 31 species, 28 Genus and 17 families. Followed by Scorpaeniformes (12 species, 8 genus and 6 families) and Pleuronectiformes (9 species, 8 genus and 4 families) and Clupeiformes (7 species, 6 genus and 3 families) were caught in the study period. During the study, most dominant species was Leiognathus nuchalis by 6,257 individuals (62.46%) of the total, followed by Konosirus punctatus by 937 individuals (9.35%), Engraulis japonicus by 612 individuals (6.11%). The diversity was the highest in February (H’=1.931), while the lowest in April (H’= 1.001). The evenness was the highest in February (E=0.645), while the lowest in April (E=0.268). The dominance was the highest in April (d=0.858), while the lowest in February (d= 0.521). The richness was the highest in April (E=4.860), while the lowest in February (E=2.834). The similarity of community structure was 64.36% between June and August, which was the most similar in monthly similarity.