虎嘉鱼食性及食物消化的研究

本文报导虎嘉鱼(Hucho bIeekeri K.)的食性及食物消化的研究结果,其食性以水生昆虫和鱼类为主食。虎嘉鱼是较有经济价值的鱼类,这一研究对虎嘉鱼的开发和利用及人工养殖提供了科学依据。

A STUDY ON THE FEEDING HABIT AND DIGESTION OF THE FOOD OF HUCHO BLEEKERI KIMURA

Hucho bleekeri kimura feeds mainly on aquatic insects and fishes in its lifetime. It feeds on the larvae of aquatic insects when its body length measures 4.5-9.cm, the occurrence rate of this food is 100%, of which the larvae of mayfly order makes up 78%. It feeds mainly on aquatic insects when its body Length measures 9-11cm, the occurrence rate of this food is 53.85%, It feeds mainly on aquatic insects and Nemachilus species when its body length measures 15-35cm, the occurrence rates of the food are 76.92% and 84.62% respectiveyly Hucho bleekeri Kimura with a body length above 40cm feeds mainly on fishes, the occurrence rate of the food is75% (of which Nemachilus species makes up 25%). The food is digested in stomach and absorbed in pylorus part. The digestve intensity in the mature period is stronger than that in the immature period.