نتایج جستجو برای: stage structured population

تعداد نتایج: 1135421  

Journal: :J. Systems Science & Complexity 2008
Xinzhu Meng Lansun Chen

This paper formulates a robust stage-structured SI eco-epidemiological model with periodic constant pulse releasing of infectious pests with pathogens. The authors show that the conditions for global attractivity of the ‘pest-eradication’ periodic solution and permanence of the system depend on time delay, hence, the authors call it “profitless”. Further, the authors present a pest management s...

Journal: :Theoretical population biology 2009
Michel Benaïm Sebastian J Schreiber

Environmental fluctuations often have different impacts on individuals that differ in size, age, or spatial location. To understand how population structure, environmental fluctuations, and density-dependent interactions influence population dynamics, we provide a general theory for persistence for density-dependent matrix models in random environments. For populations with compensating density...

Journal: :Journal of mathematical biology 2004
Stephen A Gourley Yang Kuang

Many of the existing models on stage structured populations are single species models or models which assume a constant resource supply. In reality, growth is a combined result of birth and death processes, both of which are closely linked to the resource supply which is dynamic in nature. From this basic standpoint, we formulate a general and robust predator-prey model with stage structure wit...

Journal: :Ecological applications : a publication of the Ecological Society of America 2007
A Deines E Peterson D Boeckner J Boyle A Keighley J Kogut J Lubben R Rebarber R Ryan B Tenhumberg S Townley A J Tyre

Structured population models are increasingly used in decision making, but typically have many entries that are unknown or highly uncertain. We present an approach for the systematic analysis of the effect of uncertainties on long-term population growth or decay. Many decisions for threatened and endangered species are made with poor or no information. We can still make decisions under these ci...

Journal: :SIAM Journal on Applied Mathematics 2000

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