文章基本信息

标题：A three-stage discrete-time population model: continuous versus seasonal reproduction
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作者：Azmy S. Ackleh ; Youssef M. Dib ; Sophia R.-J. Jang 等
期刊名称：Journal of Biological Dynamics
印刷版ISSN：1751-3758
电子版ISSN：1751-3766
出版年度：2007
卷号：1
期号：4
页码：291-304
DOI：10.1080/17513750701605440
出版社：Taylor & Francis
摘要：We consider a three-stage discrete-time population model with density-dependent survivorship and time-dependent reproduction. We provide stability analysis for two types of birth mechanisms: continuous and seasonal. We show that when birth is continuous there exists a unique globally stable interior equilibrium provided that the inherent net reproductive number is greater than unity. If it is less than unity, then extinction is the population's fate. We then analyze the case when birth is a function of period two and show that the unique two-cycle is globally attracting when the inherent net reproductive number is greater than unity, while if it is less than unity the population goes to extinction. The two birth types are then compared. It is shown that for low birth rates the adult average number over a one-year period is always higher when reproduction is continuous. Numerical simulations suggest that this remains true for high birth rates. Thus periodic birth rates of period two are deleterious for the three-stage population model. This is different from the results obtained for a two-stage model discussed by Ackleh and Jang ( J. Diff. Equ. Appl. , 13 , 261–274, 2007), where it was shown that for low birth rates seasonal breeding results in higher adult averages.
关键词：Three-stage discrete models ; Continuous breeding ; Seasonal breeding ; Global stability