乌苏里江唇(鱼骨)的鳞片和生长特征

依据238尾鱼的测量数值,研究了乌苏里江野生唇钱(鱼骨)(Hemibarbus labeo)的鳞片及生长特征,并调查了乌苏里江抓吉镇江段唇(鱼骨)的捕捞资源情况.结果表明,唇(鱼骨)的鳞片较大,为规则圆鳞,年轮特征清晰,易于分辨,鳞径(R鳞径)与生长时间(年龄t)的回归方程为R鳞径=0.858 3t 2.275(=238,r=0.986 8),体长与鳞径的回归方程为L=4.332 6R鳞径 0.029 3(n=238,r=0.990 3).乌苏里江唇(鱼骨)体重与体长的回归方程为W=0.011 5L3.0868(N=238,r=0.996 2),其生长特征适合Von Bertalanffy生长方程,体重的生长拐点t=4.59龄,W=340.90 g.在乌苏里江抓吉镇江段主要捕捞唇(鱼骨)的时间从每年开冰期4月20日到封冰期11月15日左右,其捕捞量随季节的变化而不同,4～5月、10～11月数量最多,为100～150 kg/d,6～7月为50～100 kg/d,8～9月较少,为30～40 kg/d.

Scale and Growth Characteristics of Hemibarbus labeo in the Wusulijiang River

The scale and growth characteristics were studied based on 238 specimens of Hemibarbus labeo in the Wusulijiang River,and the production from H.labeo capture at the Zhuajizhen of Wusulijiang River was investigated.Results showed that:the scale of H.labeo is big,belongs to round scale,annual ring feature is easy to identify.The regression equation between the scale radius(R_ sr)and age is R_ sr=0.858 3t+2.275(n=238,r=0.986 8),and the regression equation between scale radius and the body length is L=4.332 6R_...