连续孤雌生殖对蒙古裸腹Sao繁殖能力的影响

在实验室内采用单个体培养方法对蒙古裸腹进行了105d的连续孤雌生殖培养。在适宜而稳定的温度、盐度和食物条件下,连续孤雌生殖24个世代后,蒙古裸腹的繁殖能力未出现明显的下降趋势。实验中,74.1%的蒙古裸腹生殖窝数超过4窝,产幼前发育时间为4.28±0.37d,两次生殖间隔期为2.30±0.41d,前4窝平均每窝生殖量为7.52±1.39个。本实验结果表明:在适宜环境条件下,连续孤雌生殖24个世代不会对蒙古裸腹繁殖能力产生明显的负影响。

The effect of continuous parthenogenesis on reproduction capacity of Moina mongolica

Moina mongolica continuously reproduced 24 generations through parthenogenetic reproduction in 105 days during which M. mongolica were individually reared in laboratory under constant temperature ( 25 e ) , salinity ( 10) , and food condit ion ( 3 @ 106cell #ml- 1 Chlorella spp. ) . There was not significant decline in reproduction capacity for the progenies that were parthenogenetically reproduced. 74. 1% individuals in the experiment reproduced four broods. Time for the first brood was 4. 28 ? 0. 37days ( mean ? SD) . Interval between two broods was 2. 30 ? 0. 41 days within 1 to 4 broods while number of offspring per brood was 7. 52 ? 1. 39. This experiment indicated that there was not significantly negat ive effect on reproduction capacity of M. mongolica following 24 generations of continuously parthenogenetic reproduction.