摘要
试验研究了不同雌雄比例对泥鳅产卵的影响。结果表明:7个组中产卵量随着雌性数目的增加而提高,但相对产卵量不同。在雄性为2条的情况下,相对产卵率随着雌性数目的增加相对产卵量逐渐降低。在雌性为2条的情况下,相对产卵量在2♀4♂组泥鳅的相对产卵量最高,为572.75颗/g。并不随着雄性的进一步增加而提高。这可能是由于雄性泥鳅在潜在竞争对手存在的情况下约束了自身的求偶行为,以避免精子的竞争。
We investigated the effects of operational sex ratio on female oviposition in the Misgurnus arguillicaudatus.Total egg production increased as a function of the number of females in each of the seven treatments.However,mean per capita egg production was different.In the male for the two cases,the relative spawning rate increased with the relative increase in the number of female fecundity decreased.In the female for the two cases,the relative fecundity in 2 ♀ 4 ♂ Group Loach highest relative fecundity for 572.75（a / g）.When the male number was Constant at two,As female Individual increased,mean per capita egg production decreased.When the female number was Constant at two,mean per capita egg production was highest at 2 ♀4 ♂ group.With no further increasing of the male.We further propose that this response,whereby males constrain courtship in the presence of potential rivals,may be adaptive in the context of sperm competition avoidance.
基金
湖州市科技局新农村建设计划项目(2009YN01)泥鳅规模化繁育技术的研究
浙江省级公益性技术应用研究计划项目(2010C32033):泥鳅苗种规模化繁育关键技术的研究与示范
关键词
泥鳅
雌雄性比
产卵效果
繁殖
Misgurnus arguillicaudatus
sex ratio
result of spawning
reproduction
