闽南-台湾浅滩渔场狗母鱼类食性的研究

本文对闽南一台湾浅滩渔场狗母鱼类(多齿蛇鲻、花斑蛇鲻和大头狗母鱼)的食料生物组成、摄食强度的季节变化以及消化器官与食性等方面进行了探讨。结果表明，这三种狗母鱼类都属于游泳动物食性的底层鱼类，而且是同种残食的中级肉食性鱼类，其食料生物组成比较简单，主要摄食鱼类和头足类，还兼食长尾类、短尾类和口足类。被捕食对象的大小，随着捕食对象(多齿蛇鲻或花斑蛇鲻)叉长的增加而增大。狗母鱼类周年均有摄食，多齿蛇鲻和花斑蛇鲻在产卵盛期(3—4月)摄食强度较高。它们的消化器官的形态结构与其肉食性相适应，多齿蛇鲻和花斑蛇鲻的消化器官和食性相近似，比大头狗母鱼的食性较凶猛。

STUDY DN FEEDING HABITS DF LIZARD FISHES IN SOUTH FUJIAN AND TAIWAN BANK FISHING GROUND

The present paper deals with the composition of food organisms, the seasonal variations of feeding intensity, and the relationships between the digestive organs and feeding habits of lizard fishes (Saurida tumbil, Saurida undosquamis and Trachinocephalus myops) collected from South Fujian and Taiwan Bank fishing ground. The results show that the three species of lizard fishes belong to demersal fishes,which are carnivorous with cannibalism. The compositions of food organisms of these fishes are rather simple, whereas they feed chiefly on fish and Cephalopods, and less amount of Macrura, Brachyura and Stomatopoda. In general, the size of the prey (fishes) increases with the fork length of the predator(Saurda tumbil or S. undosquamis). It has been shown that those lizard fishes are feeding throughout the year, and the feeding intensities of Saurida tumbil and S.undosquamis become higher during the spawning season from March to April. The structures of digestive organs are adapted to their carnivorous habits which Saurida tumbil and S. undosquamis are similar to each other, and their feeding habits are more ferocious than that of Trachinocephalus myops.