繁殖群（breeding group）是指包含有繁殖功能的成年雄性和雌性动物群。一般有一雄一雌、一雄多雌和多雄多雌几种类型，少数为一雌多雄形式。有的动物只在繁殖季节组成，有的动物是长期固定的。
... 繁殖系数 breeding coefficient 繁殖群 breeding colony 育种实验 breeding experiment ...
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为了克服这个潜在的问题，多将来自不同繁殖群的仔猪混养在一起，称为共同混合。
To overcome this potential problem, many procedures mix pigs from different breeding units - know as co-mingling.
这个养殖中心是为了给兀鹫创造一个安全繁殖群，也许它们最终会被放生到没有使用双氯芬酸的野外。
The centre is intended to create a secure breeding-stock of vultures that may eventually be released into a diclofenac-free wild.
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'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.
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