Effect of acclimation temperature on plasma levels of glucose and lactate in rainbow trout, Salmo gairdneri

Abstract

Abstract Baseline plasma glucose and lactate levels were determined in unstressed rainbow trout ( Salmo gairdneri ) acclimated to 8°, 12°, and 16°C. The 8°C acclimated fish had the highest plasma glucose level (75.7 mg/dl), which is significantly greater than the 16°C acclimated fish (59.7 mg/dl) but not the 12°C fish (66.7 mg/dl). The plasma glucose levels of the 12°C and 16°C acclimated fish were not statistically different. The plasma lactate levels of 8°C fish (5.3 gm/dl), 12°C fish (4.2 mg/dl) and 16°C fish (5.3 mg/dl) were not significantly different. There was significant positive correlation between weight and length and significant negative correlation between plasma glucose and both weight and length. No other significant correlations between parameters were detected.