黄鳝食性的初步研究

通过对不同产地的２７１尾野生黄鳝的食性研究表明，全长小于１００ｍｍ的稚鱼，其食性随着全长的生长而变化，稚鱼前期以摄食轮虫，枝角类为主，后期则以水生寡毛类，摇蚊幼虫为主，而全长１０１ｍｍ－２００ｍｍ的幼鳝及全长大于２００ｍｍ的成鳝的食性，随全长变化相对稳定，且细鳝和成鳝的食谱基本相同，其主要食物组成均包括摇蚊幼虫，水生寡毛类，蚯蚓，昆虫幼虫，枝角类和桡足类等。其肠内含物中的饵料生物种类含量均在季节变

PRELIMINARY STUDY ON THE FOOD COMPOSITION OF MUD EEL, MONOPTERUS ALBUS

Food compositions of mud eels, Monopterus albus were investigated in areas of three counties in Hubei province.Diets of the mud eels with body length less than 100mm changed with their growth: from Rotifera and Cladocera to Oligochaeta and Chironomidae. However, the food composition of the mud eels with body length more than 100mm were quite constant, with Chironomidae, Oligochaeta, Pheretima,Cladocera, Copepoda and insect larvae as the major food items found.Phytoplanktons,benthic algae and organic debris were also found in intestines of the fish, indicating that the fish is to a large extent omnivorous.It is suggested that artificial feeds may be emploged in the culture of the fish.