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.
研究了太白红杉种群的年龄结构、生殖年龄结构、生殖力和生殖值，分析了太白红杉种群的生殖适合度和生殖对策。
The age structure, reproductive age structure, fecundity and reproductive value of Larix chinensis were studied, the reproductive fitness and the reproductive strategy were analyzed in this paper.
对武夷山自然保护区南方铁杉种群动态进行了系统研究，绘制该种群的年龄结构，编制静态生命表，分析存活曲线、死亡率曲线和损失度曲线。
The population dynamic of Tsuga tchekiangensis in Wuyishan Nature Reserve was studied and its age structure, the life table, survival curve, mortality rate and killing power curve were analyzed.
刺五加种群的高度结构与径级结构的变化都与群落环境以及本身的年龄结构特点有关。
The height structure and diameter structure of A. senticosus population relate with community environments and with its own age structure characteristics.
结果表明两种大袋鼠格斗行为并不一致，种群内中年龄结构是导致不同格斗行为发生的主要因素。
The result shows that this behavior varies between species and within species. Moreover, the age structure is the main factor leading to the different agonistic behaviors.
结果表明，应用立木级结构代替年龄结构研究栲树种群的结构和动态特征是适用的。
The result shows that the Tree class structure replacing the age structure is suitable for studying the structure and dynamics of Castanopsis fargesii population.
在周期环境下，研究一类具有年龄结构种群线性动力系统的最优控制问题。
The optimal control problem of linear population dynamic system with age-structure in periodic environment was investigated.
本文用种群大小结构代替年龄结构研究了沙地云杉种群的大小结构、分布格局和动态规律。
The size structure and distribution pattern of Picea mongolica population on sand dune and their rerlationship to eco-environment are studied by size structure in place of age structure.
本文主要研究具有扩散和年龄结构的三种群竞争系统的最优收获策略问题。
This paper is mainly concerned with optimal harvesting policy for three competing species with age-dependent and diffusion.
通过对银杉主要群落种群的数量统计和年龄组成的分析，编绘了银杉种群的特定时间生命表、存活曲线和年龄结构图。
The time specific life table, survivorship curve and age structure of Cathaya argyrophylla population were obtained through analysing the demography and age structures of its main coenopopulations.
研究某一类改进的关于年龄结构的非线性种群系统的最优控制问题。
The present paper is concerned with the optimal control problem for an improved nonlinear age-dependent population dynamics.
研究一类具有年龄结构的捕食-食饵种群动力系统的最优收获策略。
We investigate optimal policy for a predator-prey system with age-dependent.
对国内报道过的几种有关根茎禾草无性系种群年龄结构的研究方法作了评价。
In view of observing, determining and investigating from all sides, the applicable methods of study on age structures of clonal populations in rhizome grass were reported in this paper.
采用群体遗传学理论与方法研究了陕西省秦川牛场秦川牛保种群30多年来的保种情况，详细地分析了保种群的规模、年龄结构及迁移情况。
Population genetic theory and method were used to study the conservation results of Qinchuan cattle for 30 years plus in Qinchuan cattle farm of Shaanxi province.
采用群体遗传学理论与方法研究了陕西省秦川牛场秦川牛保种群30多年来的保种情况，详细地分析了保种群的规模、年龄结构及迁移情况。
Population genetic theory and method were used to study the conservation results of Qinchuan cattle for 30 years plus in Qinchuan cattle farm of Shaanxi province.
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