模拟分析了繁殖群体大小、繁殖偏倚和占群优势雄性数目对麋鹿的有效种群大小的影响。
We simulated the impacts of breeding herd size, reproductive skew and numbers of breeding stags on the inbreeding coefficient of Père David's deer.
除非烟囱始终位于更适宜的暖水喷口附近，否则化学合成只能占喷口动物群的一小部分。
Unless smokers are consistently located near more hospitable warm-water vents, chemosynthesis can account for only a fraction of the vent faunas.
接下来，将你的消费者基群根据相近特征分割为多个群体，你会发现，可能有些群体只占你当前销售量的一个小百分比。
Next, as you segment your customer base into groups with similar characteristics you may find that some of the groups that presently account for a small percentage of your sales show potential.
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