摘要
研究了１～１６ｄ龄乌鳢仔鱼水分、Ｎａ＋、Ｋ＋、脂肪和蛋白质含量的变化及其主要摄食行为．结果表明，初孵仔鱼含水量为５０．１５％～５２．４０％，并随发育进展持续上升到８６．３５％～８６．８６％，而仔鱼干重则在第６ｄ最低．Ｎａ＋、Ｋ＋在仔鱼前期波动较大，第８ｄ后稳步上升，脂肪食量在孵出后的前４ｄ基本上保持不变，第５ｄ下降１５．８５％，第６ｄ下降３４．３８％，此后一直下降．蛋白质含量前８ｄ变化很小，第８ｄ后开始大幅上升．结合行为学观察认为，油球在仔鱼前期主要作为“浮力器官”（ｂｕｏｙａｎｃｙｏｒｇａｎ），在后期则可补偿摄入能量的不足．
The contents of water,Na+ K+,lipid and protein in 1～16 dabs old snake-head fish,Channa argus(Cantor),as well as its behavior were studied. The results showed thst the moisture content of the newly hatched larvae was 50.15%～52. 40%,and would raise constantly up to 86.35%～86.86% with their development. The lowest dry weight of body appeared on the 6th day after hatching. The contents of Na+ and K+ of the larvae were unsteady in the pro-stage,but raised steadily from the 8th day,The lipid content was steady in the first 4 days but decreased by 15.83% on the 5th day and 34.38% on the 6th day,and then decreased constantly.The protein content was steady in the first 8 days and then besan to increase greatly.Observations showed that oil globule mainly acted as a buoyancy organ during the first growth period of the larvae and as a supplementary energy source during the later Period according to the behavior of the larvae.
出处
《应用与环境生物学报》
CAS
CSCD
1996年第2期127-131,共5页
Chinese Journal of Applied and Environmental Biology
基金
湖北省自然科学基金
关键词
鱼纲
乌鳢
仔鱼
生化成分
摄食行为
larval snake-head fish
Channa argus
biochemical components
behavior
