【摘要】 对黄颡鱼幼鱼在日过量投喂8次和投喂1次条件下的摄食节律进行了研究。日过量投喂8次时黄颡鱼幼鱼表现出明显的摄食节律,摄食率高峰值出现在晚上20:00,低峰值出现在上午8:00。夜间时段摄食率显著高于白天时段摄食率,不同时间段的摄食率差异极显著。日不同时间段过量投喂1次时,高峰值出现在晚上23:00,低峰值出现在上午11:00,但8个时间段的摄食率差异不显著。投喂8次组的日摄食率远高于1次组。结果表明黄颡鱼幼鱼为夜行性摄食,但投喂频率、投喂量等因素直接影响其摄食节律。更多还原

【Abstract】 The circadian feeding rhythm for juvenile yellow catfish,Pelteobagrus fulvidracoat different feeding frequencies was investigated.The results showed there are typical nocturnal feeding activity with the highest levels of feeding activity at 20:00 pm and the lowest levels at 8:00 am in the condition of over-feeding 8 times per 24 hours.There are significantly different feeding rate between different feeding time(P<0.01).The simility circadian feeding rhythm occurred in the condition of over-feeding only once in different time per 24 h.However,there is no different feeding rate between different feeding time in the latter feeding condition(P>0.05).The result showed that the circadian feeding rhythm of juvenile yellow catfish belongs to nocturnal.更多还原