摘要
鲫鱼(Carassius auratus)是一种经济价值较高的鱼类。1981～1990年根据怀柔水库的1000余尾标本,讨论了该水域中鲫鱼种群的性比、成熟年龄和体形大小以及与产卵量之间关系。依据体长、体重和年龄建立了绝对产卵量的回归方程,讨论了种群的繁殖力,每年4～5月为鲫鱼产卵时期,应予以保护。
The Crucian Carp (Carassius auratus) in Huairou Reservoir of Beijingis a fresh-water fish that has a high economic value. Sex ratio, mature ageand body length of Crucian carp population and their relation to the egg-produce are studied.The regression equation of absolute egg-produce on thosecharacters is set up, the population reproduction ability is discussed. theperiod from April to May is the breeding season, the time when the CrucianCarp must be protected.
关键词
鲫鱼
繁殖
种群繁殖
逐步回归
crucian carp(carassius auratus)
reproduction
gradual regression
