大川海濱 碎波帶 魚類群集의 季節變化 = Seasonal Variation in Abundance and Species Composition of Surf Zone Fish Assemblage at Taecheon Sang Beach, Korea

다국어 초록 (Multilingual Abstract)

Fish assemblage occupying the surf zone habitat of Taecheon sand beach in Cheonsu Bay was analyzed using monthly samples collected by a beach seine from September 1984 through August 1985. During each sampling period five hauls were completed, one at each 2-hour interval during the spring tide. Of 35 species identified, Favonigobius gymnauchen, Sillago japonica, Konosirus punctatus, Sardinella zunasi and chaenogobius mororana accounted for 79% of the individuals collected, and F. gymnauchen, s. japonica, K. punctatus, S. zunasi and Kareius bicoloratus constituted 67% of the biomass obtained. Overall abundance in terms of numbers and in biomass were 0.13 individuals/m$^2$ and 0.33g/m$^2$, respectively. A larger number of individuals and greater biomass was observed during the warmer months showing significant correlation with water temperature. High abundance of June was related to the occurrence of adult F. gymnauchen. A large number of individuals and great biomass was collected in August and September, a period of high abundance in juveniles of the seasonal species such as S. japonica, K. punctatus and S. zunasi. Temperature and habitat occupation according to life history of the dominant species might be the primary factors of the marked seasonality of the surf zone fish populations in the study area.