南方鲇继饥饿后的恢复生长
THE RECOVERY GROWTH IN THE SOUTHERN CATFISH (SILURUS MERIDIONALIS) FOLLOWING STARVATION
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摘要: 1996年1月至4月在27.5℃条件下,对南方鲇幼鱼(初始体重:73.65±9.82g)进行了不同时间的饥饿处理后再供食的恢复生长实验。实验鱼饥饿60d后,鱼体比能值、蛋白质含量及脂肪含量明显下降,灰分含量及含水量明显上升。分别将饥饿处理0(对照)、10、20、30、40、50和60d的南方鲇再恢复喂食,在饱足摄食水平下生长20d。各饥饿处理组的鱼体化学组成及比能值均接近,并恢复到对照生长组水平。饥饿处理50d组的干重及能量生长率,湿重、干重及能量摄食率显著高于对照组的相应值。通过讨论认为:(1)饥饿处理50d的南方鲇在恢复生长过程中产生了显著的补偿效应；(2)该补偿现象主要因摄食水平显著升高所致。
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关键词:
- Silurus meridionalis /
- 鱼类能量学 /
- 饥饿 /
- 恢复生长
Abstract: The recovery growth experiment in southern catfish (initial weight: 73.65±9.82g), following starvation, was carried out at 27.5℃ from January to April, 1996.In body of the fish starvated for 60 days contents of energy, protein and lipid decreased, and contents of ash and water increased. The tested fish were divided into 7 experimental groups which were deprived food for 0(control), 10, 20, 30, 40, 50 and 60 days, respectively. Then each group was re fed at ad libitum ration level for 20 days. At the end of the recovery growth, chemical composition and energy content in each group were similar with the control group. During the recovery growth SGRd(specific growth rate in terms of dry weight), SGRe (in energy), RLw (ration level in terms of wet weight), RLd (in dry weight) and RLe (in energy) in the group by starvation pretreatment for 50 days were higher significantly than those in the control group. This paper suggested that f (1) Silurus meridionalis starvation pretreatment for 50 days showed significantly compensatory effect in the recovery growth, (2) the compensatory growth resulted from significant increase of the ration level in the recovery growth.-
Keywords:
- Silurus meridionalis /
- Fish energetics /
- Starvation /
- Recovery growth
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