黄姑鱼幼鱼继饥饿后补偿生长的研究

Study on the Compensatory Growth Following Starvation of Spotted Maigre(Nibea albiflora)

在室内玻璃钢水槽内对平均初始体重为7.18±0.49 g的黄姑鱼进行了40 d养殖实验以研究其在停喂不同时间后的补偿生长。实验共设5个食物处理组,4组鱼分别饥饿4 d(S4组)、8 d(S8组)、12 d(S12组)和16 d(S16组)后再恢复正常投喂;1组鱼实验期间始终正常投喂作为对照(S0组)。结果表明,S4组实验结束时体重略低于S0组,但未达到显著性水平(P>0.05);S8组、S12组和S16组显著低于S0组(P<0.05);饥饿导致鱼体蛋白质和脂肪含量降低,水分和灰分的含量升高。实验结果显示,S4组的黄姑鱼幼鱼在恢复生长过程中出现了完全补偿生长效应,S8组出现了部分补偿生长效应,S12组和S16组未出现补偿生长效应,饥饿后恢复投喂鱼对食物的摄食率和食物转化率得到明显改善,这表明适度饥饿后再投喂可作为黄姑鱼养殖中有益的饲养管理策略。

A 40-day experiment was carried out in indoor fishbowl to examine the capacity for compensatory growth of Nibea albiflora（7.18±0.49 g）.Five feeding regimes were established.One group of fish fed a formulated diet in excess throughout the experiment served as the control,while the remaining four groups were deprived of feeding for 4 days（S4）,8 days（S8）,12 days（S12）,16 days（S16）,respectively,and then re-fed in excess.The results showed that S4 are lighter than the control group（P0.05） whereas S8,S12 and S16 represented very significant difference that was lighter than control group（P0.05）.As the time of starvation extended,except for the content of moisture obvious increased,the content of crude protein and crude lipid deceased significantly,but the content of ash dropped slightly after starvation.It was indicated that complete compensatory growth in S4 group appeared in the course of recovery growth,and the partial effect in S8 group,but no effect in S12 and S16 groups.During re-feeding,the deprived fish showed increased feed intake（FR） and food conversion efficiency（FCE）,therefore,reveal cycling feeding deprivation and re-feeding was a useful tool for feeding management of N.albiflora.