细鳞鲑F<sub>2</sub>池塘养殖生长特性研究

Abstract

为探索养殖环境条件下细鳞鲑(Brachymystax lenok) 的生长特性，2016年3月28日至5月22日对养殖在自然水温(10℃~12℃)的1龄幼鱼进行了研究，测量幼体全长与体重，并用计算机软件SPSS和Excel对获得的数据进行处理分析。研究结果显示：在试验条件下，细鳞鲑全长和体重的瞬时生长率、全长和体重的日增长量，全长和体重的相对增长率，都呈升高–降低–升高–降低–升高的变化趋势，最高峰值出现在383日龄。细鳞鲑体重与日龄的关系为W = 0.4392e0.0121t (R2 = 0.9757)；全长与日龄的方程式为L = 4.4785e0.0035t (R2 = 0.9913)；体重与全长的方程式为W = 0.0027L3.4106(R2 = 0.9776)，其中异速生长系数b > 3，表明细鳞鲑1龄幼鱼为异速生长类型，体重的生长快于全长生长。 In order to understand the growth characters of F2 Brachymystax lenok culturing in ponds, expe-riments were conducted on the juvenile growth from 28th March to 22th May in 2016, under the condition of natural water temperature in the range of 10˚C and 12˚C. The juvenile growth of Brachymystax lenok body weight and length were measured. All the data were processed by Excel and SPSS software. The results showed that body weight’s instantaneous growth rate and body length’s instantaneous growth rate and body weight daily growth and body length daily growth presented the trend of rising-decreasing-rising-decreasing-rising, and the growth peak appeared in 383-day old. The relationship between body weight (W) and day-age (t) was showed in W = 0.4392e0.0121t (R2 = 0.9757). The relationship between the total length and day-age was obtained in L = 4.4785e0.0035t (R2 = 0.9913). The total length-weight relationship was W = 0.0027 L3.4106 (R2 = 0.9776). When b > 3, the growth was allometric, which showed that the growth of weight was faster than the length’s of juvenile.