2005-2007년 월성주변해역 어류 종조성의 계절변동

Abstract

The present study investigated marine environment, fish species composition and community structure of fishes collected from the adjacent waters of Wolseong nuclear power plant in Gyeongsangbuk-do between February 2005 and November 2007. The surface water temperature showed a common seasonal pattern during the studying period, but the bottom water temperature (BWT) differed by year. In 2005, the BWT was not much varied by season. However, in 2006, the BWT was highest in May and November, but lowest in August. In the case of 2007, the BWT was the lowest in May, but reached peak in November. Therefore, the North Korean Cold Current is thought to be different by year. A total of 69 fish species were collected, of which five species accounted for 87.1%: Clupea pallasii, Lophius litulon, Liparis tesselatus, Trachurus japonicus and Glyptocephalus stelleri. Clupea pallasii appeared throughout the year, may resulting from the strong North Korean Cold Current in this area. Cluster analysis showed no significant grouping by stations as well as seasons. Correlation analysis showed no significant correlation between marine environmental factors and fish species composition.