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本文报道了双凤水库银鲫的年龄生长特征。以银鲫鳞片上的年轮作为年龄鉴定依据。渔获物中2龄和3龄的个体占80％以上,体长以120～150nm为主。体长与鳞长之间呈直线正相关BL=21.20+28.91R,体重与体长呈指数函数相着(?)♀=9.252×10~(-5)BL~(2814),(?)♂=1.685×10~(-5)BL~(3,155)。2龄以前生长较快,以后转入缓慢,生长适合Von Pertalanffy方程:1t=192.4〔1-e~(-kt(?)0.093)〕,体重生长曲线的拐点位于2.06龄的(?)=0.296(?)处♂与1975年资料相比,现在的生长速度明显缓慢,作者认为主要由于群体更替所致。
The paper reports the age growth characteristics of silver carp in Shuangfeng reservoir. The silver carp scales on the ring as the basis for identification of age. Catch 2 and 3 age individuals accounted for more than 80% body length to 120 ~ 150nm-based. Body length and scale length showed a linear positive correlation between BL = 21.20 + 28.91R, body weight and body length showed an exponential function (?) ♀ = 9.252 × 10 -5 BL ~ (2814), ♂ = 1.685 × 10 ~ (-5) BL ~ (3,155). The growth of the body weight curve was faster than that before the second instar and then turned slowly. The Von Pertalanffy equation was suitable for growth: 1t = 192.4 〔1 -e ~ (-kt (?) 0.093) (?) Department ♂ compared with the data in 1975, the current growth rate was slow, the author believes that mainly due to the replacement of groups.