The effect of temperature on chyme proteinase activities in perch Perca fluviatilis L. and roach Rutilus rutilus (L.)

The effect of temperature on the chyme proteinase activities of the perch Perca fluviatilis L. and the roach Rutilus rutilus (L.) was investigated. The two fish species showed different characters of temperature dependence and different values of activation energy for caseinolytic and hemoglobinolytic chyme proteinases. The perch was characterized by a higher level of relative proteinase activities and lower activation energy for protein hydrolysis at a temperature of 0–10°C than the roach.