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本文详细叙述了池养条件下长吻鮠苗种的食性,主要结果如下:1.在体长为6～142毫米个体的消化道中,发现有23属和20种饵料生物（其中藻类有21属,rrrrrrrrn枝角类12种,桡足类5种,水生寡毛类3种和2属摇蚊幼虫）。开口饵料为底栖性藻rrrrrrrrn类（绿藻和硅藻）。2.仔幼鱼对浮游生物和底栖动物的选择摄食与口宽、口径有密rrrrrrrrn切关系。11—12毫米长度组的苗种要摄食体宽为1毫术以下的藻类、枝角类和桡足rrrrrrrrn类,随着口器的增大,逐渐摄食较大的浮游动物和底栖动物。3.体长为8—23毫米rrrrrrrrn的苗种摄食浮游生物、小型摇蚊幼虫和配合饲料,体长达到32—50毫米时主要摄食rrrrrrrrn浮游动物和摇蚊幼虫,体长为50—60毫米的苗种主要食物为摇蚊幼虫,水生寡毛类rrrrrrrrn和配合饲料。
The main results are as follows: 1. In the digestive tract of 6 ~ 142 mm in length, 23 genera and 20 species of bait organisms were found (among which, algae had 21 genera , 12 species of cladocera, 5 species of copepods, 3 species of aquatic oligochaetes and 2 species of chironomid larvae. Open-mouth bait for the benthic algae (green algae and diatoms). 2. juvenile fish on plankton and zoobenthos feeding choice and mouth width, caliber dense close relationship. Ralours, cladocerans and copepods with a body width of 1 milliliter or less were planted in 11-12 mm length seedlings, Larger devices gradually feed larger zooplankton and zoobenthos. 3. Body length of 8-23 mm planted feeding plankton, small chironomid larvae and mating feed, body length up to 32-50 mm Main food intake Zooplankton and chironomid larvae, body length of 50-60 mm seed main food Chironomid larvae, aquatic oligochaetes r r r r r r r r n and compound feed.