几种淡水小型鱼类吞食粘性鱼卵的初步观察

通过在室内进行８种淡水小型鱼类吞食鱼卵的试验观察表明：小型鱼吞食鱼卵带有普遍性，吞食强度依次为宽鳍、麦穗鱼、马口鱼、虎鱼、棒花鱼、鱼旁鱼皮、银鱼句、，其中７种鱼具有昼夜摄食节律，高峰期各异，但每天皆有１６ｈ的停食期．由此可见，小型鱼类通过摄食鱼卵，对能够在湖泊水库中自然繁殖的经济鱼类及凶猛鱼类的种群具有一定调控作用，对公鱼等孵化期较长的鱼类移植效果产生不良影响

The Preliminary Observation on Eight Small Freshwater Fishes Eating Adhesive Fish Eggs

By the observation in laboratory on eight small freshwater fishes eating fish eggs, it shows that small fishes eating fish eggs has a universality. The feeding intensity in order are Zacco platypus, Pseudorasbora parva, Opsariichthys bidens, Ctenogobius sp ., Abbottina rivularis, Rhodeinae sp ., Gnathopogon chankaensis and Hemiculter leucisculus . Seven of them have their feeding rhythms during the day and night and their feeding peaks are different. All of them have 16 hours duration of indigestion a day. Thus it can be found that small fishes through eating fish eggs have some regulative affects to the populations of economic and voracious fishes which can naturally reproductivity in lakes and reservoirs. And they have some effects to the transplantation of some fishes with long hatching period, such as Hypomesus.