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Persistence and Critical Domain Size for Diffusing Populations with Two Sexes and Short Reproductive Season

机译:具有两个性别和较短繁殖季节的扩散种群的持久性和临界域大小

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摘要

A model is considered for a spatially distributed population of male and female individuals that mate and reproduce only once in their life during a very short reproductive season. Between birth and mating, females and males move by diffusion on a bounded domain under Dirichlet boundary conditions. Mating and reproduction are described by a (positively) homogeneous function (of degree one). We identify a basic reproduction number that acts as a threshold between extinction and persistence. If , the population dies out while it persists (uniformly weakly) if . is the cone spectral radius of a bounded homogeneous map.
机译:考虑一个在空间上分布的男性和女性个体的模型,这些个体在非常短的繁殖季节中一生中只有一次交配和繁殖。在出生和交配之间,雌性和雄性在Dirichlet边界条件下通过有界域上的扩散而移动。交配和复制由(正)齐次函数(级别为1)描述。我们确定了一个基本的繁殖数量,该数量充当了灭绝和持久性之间的阈值。如果,则种群在持续的情况下(均匀弱)消失。是有界齐次映射的圆锥光谱半径。

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