Abstract
Effect of water temperature on feeding and growth of the fluvial sculpin Cottus pollux LE was studied using 9 different temperatures from 10 to 26℃. At each of the 9 temperatures, six males and six females at age 1+, 2+ and 3+ were reared in aquaria for periods of 30 days. Based on values of the daily growth rate and feeding efficiency of Cottus pollux LE, we found that the suitable water temperature for growth ranges are from 14 to 20℃ at age 1+, from 14 to 18℃ at age 2+, and from 12 to 18℃ at age 3+ for males, from 12 to 22℃ at age 1+, from 12 to 20℃ at age 2+, and from 12 to 18℃ at age 3+ for females. Also, the daily growth rate and feeding efficiency for 24 and 26℃ had lower values for both sexes at age 2+ and 3+.