河鲈食性分析及其摄食生态策略

THE FOOD ANALYSIS AND FEEDING ECOLOGICAL STRATEGY OF PERCA FLUVIATILIS

通过对新疆乌伦古湖１４５０尾河鲈食性的鉴别与统计，比较了不同年龄组（０＋～９＋）在不同季节食物组成及摄食强度，研究了河鲈摄食生态位的时空格局，并综合其生长生殖特点探讨了可能存在食浮游一底栖动物群（０＋～２＋），食鱼群（３＋及３＋以上）两种生态类群及该物种的摄食生态策略。

The food composition of 1450 specimens of Perca fluviatilis (0 +～9 +) in Xin Jiang Wulunguhu lake was analyzed, and the food composition and feeding intensity in different seasons of different age groups were compared. The temporal and special patterns of feeding niche were also researched also.Synthesizing the results of the study with the characters of this fish in growth and reproduction,it is revealed that there may be two ecological groups,one is the group preying on benthic animals and zooplanktons(0 +～2 +),the other is the group preying on piscivorous fishes(t>3 + ) , and most individuals of the former are of miniature body and early maturing,while most of the latter are large sized and late maturing.The feeding strategy of this species is discussed also.The results are helpful to further study on its ecology and make success of its transplantation and domestication