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通过对采自长江一级支流府河孝感段不同月份的267尾赤眼鳟标本的解剖资料,研究了府河水系赤眼鳟的年龄、生长及其种群结构特征。赤眼鳟的体长与体重呈幂函数关系:W=1×10-5.L3.0727;生长方程为:Lt=472.9[1-e-0.192(t+0.6029)],Wt=1640.14[1-e-0.192(t+0.6029)]3.0727。种群年龄结构为1~9龄,捕获个体主要为2~3龄,二者合计占到82.77%;种群的雌雄性比为1.07∶1,接近于1∶1;最小性成熟年龄为2龄。体重生长拐点年龄t=5.86龄,捕捞年龄偏低,应提高捕捞规格,以充分利用资源,同时要加强资源保护。
The anatomical data of 267 red-brown trout collected in different months of Xiaogan section of Fuhe, a tributary of the Yangtze River, were used to study the age, growth and population structure of the red-trout trout in the Fuhe River. The body length and body weight of erythroid trout showed a power function relationship: W = 1 × 10-5.L3.0727; the growth equation was: Lt = 472.9 [1-e-0.192 (t + 0.6029)], Wt = 1640.14 [1-e -0.192 (t + 0.6029)] 3.0727. The age structure of the population was from 1 to 9 years old, and the captured individuals were mainly 2 to 3 years old, accounting for 82.77% of the total population. The ratio of male to female in the population was 1.07:1, which was close to 1: 1. The minimum mature age was 2 years old. Weight growth inflection point age t = 5.86 age, fishing age is low, fishing specifications should be raised to make full use of resources, while strengthening resource protection.