Changes on Hematological Factors and Oxygen Consumption of Korean Rockfish Sebastes schlegeli in High Water Temperature

Abstract

Aquaculture production of Korean rockfish Sebastes schlegeli has been continuously increased from 2000s and the fish has become the second most important mariculture fish in Korea. However, there are some environmental problems in aquaculture of Korean rockfish recently. In this regards, stress responses to high water temperature was examined via oxygen consumption, blood physiological parameter and endocrinological method. Oxygen consumption of Korean rockfish had significantly increased with rising water temperature. And oxygen consumption during the light time was no different with the dark time. The levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) showed no difference until 27 , but it had rapidly increased at 30 . Moreover high water temperature affected to increase in ℃ ℃ plasma glucose and cortisol levels.