饥饿后再投喂对星斑川鲽生化组成以及能值的影响

Effects of starvation and subsequent feeding on biochemical composition and energy value of Platichthys stellatus

中文关键词: 星斑川鲽  补偿生长  饥饿  生化组成

英文关键词: Platichthys stellatus  Compensatory growth  Starvation  Biochemical composition

中文摘要:

      采用饥饿不同时间后再恢复投喂相同时间的方法，在温度19±1℃ 、盐度32±1的条件下，对相同规格的星斑川鲽(26.02±0.30g)鱼体和粪便的生化组成以及能值等相关指标的影响进行了研究。研究结果表明，饥饿后再投喂对星斑川鲽鱼体内水分、脂肪和灰分的含量影响显著，对鱼体内蛋白质含量无显著影响；对粪便脂肪和蛋白质含量影响显著，对粪便中灰分无显著影响；对鱼体能值影响显著，对粪便的能值无显著影响。研究还发现，饥饿处理时间越长，各相关指标变化越显著；随着恢复投喂的进行各相关指标逐渐恢复到对照组水平，饥饿处理时间越长，恢复到对照纽水平所需要的时间越长。

英文摘要:

      The effect of starvation for varied period of time and subsequent feeding for the same time on the biochemical composition and energy value of Platichthys stellatus, cultured in seawater at salinity of 32±1 and temperature of 19±1 ℃, was examined. The contents of water, lipid, protein, and ash in the body and feces of P.stellatus at an average body weight of 26.02±0.30g were determined. Compared to the control group, the contents of the examined items were significantly different in three treatments which were starved for 5, 10, and 15 days respectively and subjected to subsequent re-feeding. The contents of water, lipid, and ash, and the energy value in the body of P. stellatus changed significantly, while the content of protein showed a moderate change. The contents of lipid and protein in the feces changed noticeably while the content of ash and the energy value stayed unchanged compared to the control group. It was also found that the biochemical composition was positively correlated with the time of starvation; the longer the starvation time, the more significant the change. The biochemical composition gradually recovered to the normal values after re-feeding, and the longer the starvation time, the longer the recovery time.