【摘要】 研究了道观河水库细鳞鲴的个体生殖力。细鳞鲴样本由2~+-5~+龄鱼组成,其个体绝对生殖力与体长、体重和年龄分别呈直线、对数函数和幂函数相关,体长相对生殖力与体长、体重和年龄分别呈双曲线、对数函数和幂函数相关,体重相对生殖力与它们相关不显著。多元逐步回归分析其绝对生殖力和体长相对生殖力均与体重和成熟系数密切相关,而体重相对生殖力仅与成熟系数相关。更多还原

【Abstract】 Daoguanhe Reservoir（30°52′N,114°59′E）situated in Wuhan, Hubei Province of China, is a mid-dle--sized hilly--lake reservoir built in 1968. X microlepis is the main fish and made up of 15% of fishproduct in the reservoir during 1985--1988. But the production of X microlepis declined in recentyears, the fecundity of X microlepis from Daoguanhe Reservoir was studied for utilizing its resourcesustainably during April to May 2001. The scales used as aged material. The indices were measured with the routine method. All data wasanalyzed with STATISTCA soft. Relationship between its’ fecundity and indices imitated with 8 kindsof mathematic expressions. One hundred and ten specimens were colleted belonging to the age of 2⁺ -- 5⁺. Relationship betweenits’ absolute fecundity（F） and body length（L）, body weight（W） and age（A） could be expressed withthe linear, logarithmic and exponential equation, respectively. Relationship between relative fecun-dity per centimeter（F_L） and body length, body weight and age could be described using the hyper-bolic, logarithmic and exponential equation, respectively. The equations（p < 0. 01） as follow:F= -13. 414 + 0. 756 L R²= 0. 8786 F_L= -1. 459 + 0. 521 lnL R²= 0. 7664F= -29. 322 + 6. 326 lnW R²= 0. 8692 F_L= -0. 712 + 0. 168 lnW R²= 0. 7626F= 1. 012 A^1.266 R²= 0. 7877 F_L= 0. 0666 A^{0. 882} R²= 0. 6824 The number of telative fecundity per gram mainly ranged from 150--250 and averaged 212. Mul-ti--regressive analyses showed its absolute fecundity and relative fecundity per centimeter were sig-nificant related with body weight and maturing coefficient, and relative fecundity per gram（F_W） onlywith maturing coefficient:F= -2. 846 + 0. 0192 W + 0. 216 GSI, （n= 110, H= 0. 9182, p < 0. 00l）F_L= -0. 504 + 0. 000456 W + 0. 00942 GSI, （n=110, R²= 0. 8553, p < 0. 001）F_W= 78. 336 + 8. 415 GSI, （n = 110, R²= 0. 4104, p < 0. 001）更多还原