摘要
通过室内模拟测定了方斑东风螺幼螺在禁食120 d中耗氧与氨氮排泄的连续变化。结果显示,随着饥饿时间延长,幼螺耗氧率呈指数式下降;排氨率先较快下降后有一定程度回升,实验结束时分别下降为对照的37.02%,75.32%。饥饿60 d前,氧氮比(O/N)较高(35.34～46.56),60～90 d有所下降(25.92～28.50),90 d后维持在一更低水平(13.33～19.80)。结果表明,饥饿90 d前幼螺主要以消耗脂肪与糖原供能,90 d后则以蛋白质和脂肪为主,并逐步加大蛋白质的动用量;幼螺通过减少活动和降低代谢以适应长期饥饿胁迫环境。
The effect of starvation on metabolism was studied in the hatchery-reared juvenile spotted babylon（Babylonia areolata） of（5.72±0.73）g at（28.0±0.5）℃ during Jun～Oct,2006.The starvation resulted in exponential reduction of oxygen consumption rate,while the ammonia-N excretion rate rose to some degree after declined rapidly first,the percentages above two control values were 37.02%,75.32%,respectively,when the snails being starved for 120 d.The ratios of O/N could be divided into three phases.Before the 60th day,the values were relatively high（35.34～46.56）.There was a reduction from the 60th to 90th day（25.92～28.50）.The values were stable at a lower level after the 90th day（13.33～19.80）.The results showed that the lipid and glycogen provided the energy due to starvation before 90th day,but the protein was gradually mobilized by the snails as an energy source during the starvation.The juveniles of B.areolata reduced the activities and metabolism to adapt to the prolonged starvation.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2011年第2期203-206,共4页
Marine Environmental Science
基金
现代农业产业技术体系建设专项资金(nycytx-47)
科技部农业科技成果转化(03EFN213500133)
关键词
方斑东风螺幼螺
饥饿
耗氧率
排氨率
O/N
Juvenile Babylonia areolata
starvation
oxygen consumption rate
ammonia-N excretion rate
O/N ratio
