达氏鳇1龄幼鱼生长特性的初步研究

为了解人工养殖条件下达氏鳇（Huso dauricus）的生长特性,2009年9月29日至12月24日对养殖在自然水温（13～18℃）下的1龄幼鱼进行试验研究,测量其全长和体重,应用统计软件Excel和SPSS对测量的数据进行处理分析。结果表明,在试验条件下,达氏鳇幼鱼体重瞬时增长率与水温变化有关,体重增长量和增长率随...

The Growth Characters of 1 Year-old Huso dauricus Juvenile

In order to understand the growth characters of Huso dauricus Juvenile under artificial breeding conditions, experiments were conducted on the juvenile growth from 29th September to 24th December in 2009. The juvenile growth of Huso dauricus body weight and length were measured under the condition of nature water temperature （13-18℃）. All the data were processed by Excel and SPSS software, and the results showed that there were some correlations between body weight＇s instantaneous growth rate and water temperature. The body weight growth rate of H. dauricus Juvenile was decelerated with water temperature＇s turning down. The growth peak appeared in 134-day old juvenile under the water temperature of 18℃. But the most suitable temperature for growth of H. dauricus Juvenile should be verified by further studies. The change of H. dauricus juvenile growth index comformed to the change of its growth constant under artificial breeding conditions. But it can not fully shows the regulation of H. daurieus Juvenile for short experimental time. The the juveniles reached a mean body weight of 383.87 g and mean total body length from 30.48 cm to 44.54 cm after almost three months rearing from a mean body weight of 99.23 g and a mean total body length of 30.48 cm. The relationship between the total length and day-age was obtained in the formulas of L = 2. 8602t ＋ 28. 395 （R2 = 0. 9759）, the relationship between body weight （W） and day-age （t） was showed in W = 83.571 e0.2649t （ R2 = 0. 9797 ）, and the total length-weight relationship was W = 0. 0008L3 4177 （ R2 =0. 9931）. When b 〉 3, the growth was allometric,which showed that the growth of weight was faster than the length＇s of juvenile,and the growth was allometric. The sturgeon＇s juvenile growth characteristics studied in the paper was designed to control its growth pattern under artificial conditions and provide a scientific basis for the aquaculture production.