野含笑种群的年龄结构属稳定型。
在进行种群数量调查的同时，还对越冬灰鹤种群的年龄结构进行了探讨。
At the same time of population census, the age structure of wintering common cranes had also been examined.
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。
The result revealed that there was obviously changed in age structure and reproduction structure of L. lagurus with the decline of the population quantity.
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