饥饿及再投喂对牙鲆幼鱼氮、磷排泄的影响  

Effect of starvation and refeeding on excretion of nitrogen and phosphorus in Japanese flounder Paralichthys olivaceus

作　　者：王荦[1] 吴立新[1] 李家庆[1] 吴玉波[1] 陈晶[1] 

机构地区：[1]大连海洋大学辽宁省水生生物学重点实验室,辽宁大连116023

出　　处：《大连海洋大学学报》2011年第2期114-118,共5页Journal of Dalian Ocean University

基　　金：国家科技部"十一五"支撑计划项目(2006BAD09A01);辽宁省教育厅高等学校重点实验室项目(20060180);大连市优秀青年人才基金资助项目(大科技发[2004]166号);辽宁省高等学校优秀人才支持计划项目(RC-05-10)

摘　　要：采用静水试验法,在水温为(15.0±1.0)℃下,研究了饥饿及再投喂对牙鲆Paralichthys olivaceus幼鱼(体质量为69.56 g±2.35 g)氨氮、活性磷排泄率的影响。结果表明:饥饿初期牙鲆氨氮、活性磷排泄率呈直线下降,随着饥饿时间的延长排泄率处于相对稳定状态;再投喂后,各饥饿处理组牙鲆氨氮、活性磷排泄率快速恢复到对照组水平,摄食对牙鲆氨氮、活性磷排泄率的影响显著(P<0.05)。在饥饿和饱食状态下,牙鲆氨氮、活性磷排泄率的峰值均出现在10:00,为摄食后4 h,以后逐渐下降;低谷均出现在18:00;再投喂期间平均氨氮排泄率昼夜差异不显著(P>0.05),活性磷排泄率白天略高于夜间(P<0.05)。The effect of starvation and refeeding on excretion of nitrogen and phosphorus in Japanese flounder Paralichthys olivaceus（body weight of 69.56 g±2.35 g） were investigated by still water experiment method in a laboratory at water temperature of（15.0±1.0）℃.The results showed that the excretion rate of N and P was sharply decreased in the initial starvation and became relatively stable with the starvation preceeded.After the starved fish were refed,the excretion rates of N and P in the starved fish in the treatment groups were returned to those in the control group,indicating that there were significant effect of refeeding on the excretion of N and P（P0.05）.The maximal N and P excretion rates were found at 10：00 of 4 h after refeeding in the fed and starved fish,and decreased gradually with the minimum at 18：00.There was no significance in diurnal N excretion during the refeeding period（P0.05）.However,the average P excretion was found slightly higher（P﹤0.05） in the day time than during the night.

关 键 词：牙鲆 饥饿 再投喂 氨氮 活性磷 排泄率 

分 类 号：S967[农业科学—水产养殖]