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利用2012年3月-2013年2月在鄱阳湖通江水道进行的定置网渔获物调查的数据,运用软件FiSATII对翘嘴鲌(Culter alburnus)的生长参数以及种群补充模式进行了估算。结果显示,鄱阳湖通江水道翘嘴鲌体长范围为93-645 mm;体长(L,mm)和体重(W,g)的关系式为W=0.9×10-5L3.029(R2=0.975,n=317),von Bertalanffy生长方程的各参数:渐近体长L∞=677.25 mm,生长系数K=0.140,理论生长起点年龄t0=-0.854。总死亡系数Z=1.514/a,自然死亡系数M=0.173/a,捕捞死亡系数F=1.341/a。鄱阳湖通江水道翘嘴鲌开发率E=0.886,资源处于过度利用状态。种群补充模式表明,鄱阳湖通江水道翘嘴鲌种群补充期在4–8月。因此,建议适当延长鄱阳湖的禁渔期,以利于其资源的恢复与保护。
Based on the data from the survey of catchments in the catchment at Tongyang Poyang Lake from March 2012 to February 2013, the growth parameters of Culter alburnus and the model of population supplementation were estimated using FiSATII software. The results showed that the body length of Cephalopsis nosocomialis in Poyang Lake was 93-645 mm, the relationship between body length (L, mm) and body weight (W, g) was W = 0.9 × 10-5L3.029 (R2 = 0.975, n = 317). The parameters of the von Bertalanffy growth equation are: asymptotic body length L∞ = 677.25 mm, growth coefficient K = 0.140, and the theoretical growth starting point t0 = -0.854. Total mortality Z = 1.514 / a, natural mortality M = 0.173 / a, fishing mortality F = 1.341 / a. Poyang Lake Tongjiang Catchment development rate E = 0.886, resources in the state of over-utilization. The model of population supplementation indicated that the replenishment period of Culter alburnus population in Tongyang waterway of Poyang Lake was from April to August. Therefore, it is suggested that the closure period of Poyang Lake should be extended as appropriate to facilitate the recovery and protection of its resources.