饥饿对日本囊对虾补偿生长及生化组成的影响

对日本囊对虾Marsupenaeus japonicus进行了不同时间的饥饿和再投喂的试验。结果表明:在饥饿1-6 d的过程中,日本囊对虾体重、脂肪含量均有所下降,而水分、灰分含量却有所增加,蛋白质含量无明显变化;试验结束时各饥饿处理组体重与对照组没有显著差异(P>0.05),虾体的生化组成均接近或达到了对照组的水平。在恢复生长过程中,各饥饿处理组虾的生长率呈波动变化,无明显规律;各饥饿处理组虾的摄食率在6 d内有明显的上升趋势,而后逐渐下降,接近对照组水平;而食物转化率总体上呈逐渐增加的趋势。日本囊对虾继饥饿后再恢复饱食出现完全补偿生长效应,且这种效应主要是通过恢复生长阶段摄食率的提高实现的。

The effects of starvation on the compensatory growth and biochemical composition of karuma shrimp ( Marsupenaeus japonicus)

Karuma shrimp(Marsupenaeus japonicus) were deprived of food for 0(Group 0), 1(Group 1),2(Group 2),3(Group 3),4(Group 4),5(Group 5),and 6(Group 6) days,and then refed.Approximate composition analysis of the shrimp showed the shrimp starved had low body weight and lipid levels and high ash and moisture contents 6 days following food deprivation.However,there was no significant difference in protein contents.At the end of the experiment,the body weight in each test group was similar.During the course of growth recovery,the specific growth rate was significant in variation.The food consumption increased significantly in each test group,then gradually decreased to the level of Group 0.The food conversion efficiency gradually increased on the whole.The results showed that there was completely compensatory effect in the recovery growth in the shrimp following starvation and that the compensatory effect mainly resulted from significantly increase in food consumption during the recovery growth.