限食水平与饥饿时间对卵形鲳鲹幼鱼补偿生长的影响

限食水平与饥饿时间对卵形鲳鲹幼鱼生长的影响实验共分7组,其中3个限食处理组日投喂量分别为对照组的20%、40%和60%,限食12 d后饱食投喂28 d;3个饥饿处理组饥饿时间分别为4、8、12 d,分别饱食投喂36、32和28 d;对照组饱食投喂40 d。结果表明:短期限食都能发生完全补偿生长效应,补偿生长效果随饥饿时间延长而减弱,饥饿12 d发生部分补偿生长;各组的摄食率和饲料转化率都有所提高,饥饿程度较大组补偿生长效应主要是通过提高摄食率来实现;在限食或饥饿期间,鱼体肌肉中的水分和粗灰分含量均有所升高,粗蛋白和粗脂肪含量呈现不同程度下降。

Effects of Food Restriction and Starvation on Compensatory Growth in Juvenile Trachinotus ovatus

Effects of food restriction and starvation on growth of juvenile Trachinotus ovatus was researched. There are seven groups： three groups were feed restrictedly by 20%, 40% and 60% for 12 d, followed a 28d-satiation-feeding; another three groups were starved for 4 d, 8 d and 12 d, respectively, then followed with 36 d, 32 d and 28 d satiation feeding, respectively; the controlled group was satiated for 40d. The results showed that： short period of food restriction resulted in completely-compensatory growth, and the effects could be weakened with time extension of starvation, so partially-compensatory growth was obtained by the group starved for 12 d. The feeding rate （FR） and food conversion efficiency （ FCE ） of all groups increased more or less,. The compensatory growth effect of groups suffered greater starvation were realized mainly by means of increasing feeding rate. During restriction or starvation, contents of both water and crude ash in muscle increased, and those of both crude protein and crude fat reduced in varying degrees.