千年笛鲷幼鱼的饥饿和补偿生长  

Starvation and compensatory growth in the young Lutjanus sebae

作　　者：区又君[1] 刘泽伟[1] 

机构地区：[1]中国水产科学研究院南海水产研究所,广东广州510300

出　　处：《水产学报》2007年第3期323-328,共6页Journal of Fisheries of China

基　　金：深圳市科技计划项目(2003-k3-132)

摘　　要：研究了在22.5～31.9℃条件下,千年笛鲷幼鱼在不同饥饿时间(0、2、4、6、9、11d)处理后再投喂的补偿生长。千年笛鲷幼鱼的体重在短时间(2～6d)的饥饿后下降不大,9d以上的饥饿可导致幼鱼的体重明显下降。经过饥饿11d后,鱼体蛋白质含量明显下降,脂肪含量略有下降,灰分含量有所上升,水分含量明显上升,表明千年笛鲷幼鱼在饥饿过程中主要依靠消耗蛋白质作为能量来源。恢复投喂后,各组的鱼体生化组成均恢复到对照组水平。饥饿11d组鱼在恢复投喂后全部死亡,半致死时间为10～11d。结果表明:饥饿2d组的千年笛鲷幼鱼在恢复生长过程中具有超补偿生长能力,该补偿现象通过提高食物转化率达到;饥饿4d组幼鱼具有完全补偿生长能力;饥饿6d组幼鱼仅有部分补偿生长能力;饥饿9d组幼鱼不具有补偿生长能力;饥饿11d组幼鱼为饥饿致死。Starvation and compensatory growth of the young emperor red snapper Lutjanus sebae were studied at 22.5-31.9℃. The fish were deprived of food for0, 2,4, 6, 9 and 11 days respectively and then refed 10 days. There was less decrease of body weight of the young fish in a few days by 2 - 6 d starvation, but it was remarkable decrease by over 9 d starvations. After 11 d starvation, the protein content was decreased significantly and the lipid content decreased slightly. This showed that L, sebae mainly depended on protein as their primary energy during starvation. At the end of refeeding, chemical compositions in each group were similar with the control group except the 11 d-deprived group. The fish of 11 d-deprived group were dead during recovery growth and the time of LD50 was 10- 11 d. The results showed that： （1） the young L. sebae of 2 d-deprived showed over compensatory effect in the recovery growth depended on significant increase of the food conversion efficiency; （2）the fish in 4 d-deprived group was fully compensatory; （3）it had only partially compensatory growth ability in 6 d-deprived group; （4）the fish of 9 d-deprived had no compensatory ability and the 11 ddeprived group was dead by starvation after the refeeding.

关 键 词：千年笛鲷 幼鱼 饥饿 补偿生长 致死 

分 类 号：S965.3[农业科学—水产养殖]