Fish was caught by a set net in Gwideok, Jeju island that was studied to determine monthly variation of species composition and catch from May 2005 to October 2006. Total catch was 54 species, 44,118 individuals, and 2,152,423.7 g during survey period. Dominant species were Trachurus japonicus and Siganus fuscescens that held 91.3% of total individuals and 71.3% of total abundance. The highest individuals and abundance of catch were in July 2005, and the lowest individuals and abundance of catch were in October 2006 and in October 2005, respectively. As the result, temporal change in abundance have corresponded with changing water temperature.

• 김맹진 | Maeng Jin KIM
• 이종희(국립수산과학원 아열대수산연구센터) | Jong Hee LEE (Subtropical Fisheries Research Center, National Fisheries Research and Development Institute (NFRDI), Jeju 690-192, Korea)
• 이창헌(국립수산과학원 아열대수산연구센터) | Chang Heon LEE (Subtropical Fisheries Research Center, National Fisheries Research and Development Institute (NFRDI), Jeju 690-192, Korea)
• 김병엽(국립수산과학원 아열대수산연구센터) | Byung-Yeob KIM (Subtropical Fisheries Research Center, National Fisheries Research and Development Institute (NFRDI), Jeju 690-192, Korea) Corresponding author