Abstract: 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.