That's because very large animals have a slow rate of reproduction, so all you have to do is remove a few young females from the herd, and you can, fairly quickly, significantly reduce the population.
那是因为大型生物的繁殖速度十分缓慢，所以只要除去象群中的几头年轻的母象，它们的数量就会大幅的下降。
That is some time after its neighbour, Macau, which has a higher reproduction rate, but a much smaller population.
（与生育率更高、人口要少很多的邻居澳门相比，这一时间要推后一些）。
The result revealed that there was obviously changed in age structure and reproduction structure of L. lagurus with the decline of the population quantity.
结果表明，随着草原兔尾鼠数量的下降，种群的年龄结构和繁殖结构都发生了明显的变化。
Reproduction and mortality are two primary factors to affect population quantity dynamic.
种群的数量季节消长主要是繁殖和死亡两因素相互作用的结果。
Strengthening the healthy reproduction propagating and serving to unmarried women floating population.
加强对未婚女性流动人口的生殖健康宣传和服务的力度。
Population size structure and population dynamics were elucidated with some statistical parameters, such as growth, survival and reproduction etc.
并通过对其生长、残存和繁殖等统计学参数的描述，揭示了种群结构和种群动态。
Effect of temperature on development, survival, reproduction, population parameter and population trend index of Spodoptera litura (Fabricius) were studied.
研究了温度对斜纹夜蛾的发育、存活、生殖、种群参数和种群趋势指数的影响。
The death and reproduction of the population make the mean density fluctuate but do not obviously change the overall level of population number and the population structure.
种群的死亡过程和繁殖过程使种群平均密度有较明显的波动，但对种群总体水平无明显影响，种群结构也无明显变化。
The elite reproduction retained good genes and guaranteed the number stability of the population.
利用精英复制保留了优秀基因，维持了种群个体数目稳定。
The establishment of system of child care leave is to balance the contradiction between work and nursery, promote the gender equality and the reproduction of population and labor force.
设立育婴休假制度的目的是平衡工作与育婴的矛盾，促进两性平等以及人口和劳动力的再生产。
Meanwhile the author used he method that self-reproduction in tetraploid Pacific oyster to build the tetraploid population.
通过四倍体的自群繁育，建立了稳定的太平洋牡蛎四倍体群体；
A detailed understanding to the particular mechanism of mating behavior, reproduction and development is effective to promote the protection of these fruit bats and to control their population.
深入地了解其独特的婚配行为机制、独特的繁殖发育机制，对有效地开展果蝠的保护工作、合理地控制种群数量有积极意义。
The brine shrimp Artemia's life history, population dynamics and effects of salinity on population traits and reproduction traits were studied at Haifeng Saltworks, which situated along Bohai Bay.
本实验研究了位于渤海湾地区的海兴县海丰盐场卤虫的生活史、种群动态和盐度对种群和繁殖的影响。
Aphids are small sap-sucking insects whose parthenogenetic reproduction and short generation time allow them to increase population size rapidly.
蚜虫是一类刺吸式口器的小型昆虫，孤雌生殖、世代周期极短、繁殖率高，这使得蚜虫种群增长迅速。
Reproductive behaviors play important roles in insect population: reproduction.
昆虫的生殖行为对其种群的繁衍起着重要作用。
All these factors would undoubtedly have an influence on the reproduction capacity of the survival offsprings of the mosquito population.
这些因素都可影响后代成活蚊的种群繁殖力。
The following is a narrative of a marriage and reproduction consultant from the Population and Family Planning Bureau of Haishu District.
以下是海曙区人口计生局的一名婚育咨询师的经历与感受。
The following is a narrative of a marriage and reproduction consultant from the Population and Family Planning Bureau of Haishu District.
以下是海曙区人口计生局的一名婚育咨询师的经历与感受。
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