摘要
大眼华鳊鳞片的年轮特征是以环片断裂间隙为主要特点的封闭○型轮纹。年轮形成时间一龄为4～5月,以后各龄相对推迟。体长与鳞长关系为L=37.42R+27.27(r=O.9445),体重与体长关系为W=0.01798L^(3.0518)(r=0.9674),体长生长方程为L_t=139.8[1-e^((-0.678)(t-0.3268))],体重生长方程为W_t=56.01[1-e^((-0.678(t-0.3268))]~3,其拐点坐标位置在t=1.95、W_(1.95)=16.64g,相当于0.297W_∞。大眼华鳊与鳙鱼存在摄食竞争,生长比鳙鱼慢,为了提高水库的渔业经济效益,宜适当控制大眼华鳊的种群数量。
The bream Sinibrama macrops forms its first growth ring in April-May and suocessive rings in later parts of the year. This study finds the relation between body and scale lengths to be L=37.42 R+27.27(r=0.9445), and that between body weight and body length, W=0.01798 L^(3.0518) (r=0.9674). The equation for body length growth was established at L_t=139.8[1-e^(-0.678(t-0.3265))], and that for body weight growth at W_t=56.01[1-e^(-0.678(t-0.3268))]~3. The point of inflection in the latter equation is located at t=1.95, W_(1.95)=16.64g, which corresponds to 0.297W_∞. Since S. macrops competes with variegated carps (bigheads) for food while growing much more slowly than the Iatter, it is recommended that reservoir population of this species be restricted in size for better economic results.
关键词
大眼华鳊
年龄
生长
长潭水库
age-growth relationship, Sinibrama macrops
