不同光照强度下乌鳢幼鱼的摄食强度及动力学

FEEDING INTENSITY AND DYNAMICS OF JUVENILE NORTHERN SNAKEHEAD, CHANNA ARGUS,UNDER DIFFERENT ILLUMINATION

在103－10－3lx光照强度范围内，乌鳢幼鱼对浮游动物的摄食强度随光照强度的减弱而增强，在10-3lx时达最大值；摄食丰在10-3lx时最高，并随时间的延长而显著降低。

The feeding intensity of juveniles of the Northem snakehead Channa argus was influenced by light intensity. Under the strong light of 103lx, the feeding intensity was relatively weak, bu strong under the weak light of 10-3lx. The feeding intensity increased with the continuous weakening of light intensity. The feeding rate of the juveniles varied with light intensity. The highest feeding rate was observed under 10-3lx, an optimum illumination found for the feeding. The feeding rate decreased with the feeding time. The feeding dynamics of the juveniles in different feeding conditions,that is, the curve of feeding dynamics, was similar in trends to the curves of deedingintensity and feeding rate.