REPRODUCTIVE EFFORT IN VISCOUS POPULATIONS
REPRODUCTIVE EFFORT IN VISCOUS POPULATIONS
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粘性种群的繁殖努力
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
I. Pen
中科院分区：
文献类型：
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作者：
I. Pen
摘要 在这里，我研究了斑块结构种群中生殖努力的亲缘选择模型，即繁殖力与生存的资源分配。繁殖的雌性终生留在同一块土地上。后代要进行代价高昂的部分长距离扩散，并争夺繁殖地，而在先前的居住者死亡后，繁殖地就会空出。主要结果是，随着后代扩散率的增加，进化稳定的繁殖努力会减少。结果可以这样理解：在一个具有全球竞争的混合性种群中，成虫和幼体都不与亲属竞争，但在斑块结构的种群中，其扩散仅限于幼体阶段，幼体与亲属的竞争比成体相对较少，从而使幼体相对更有价值。由于成虫和幼虫之间的这种不对称性随着扩散率的增加而降低，因此繁殖力分配的进化稳定水平也会降低。通讯作者：C.博格斯
Abstract Here I study a kin selection model of reproductive effort, the allocation of resources to fecundity versus survival, in a patch-structured population. Breeding females remain in the same patch for life. Offspring have costly, partial long-distance dispersal and compete for breeding sites, which become vacant upon the death of previous occupants. The main result is that the evolutionarily stable reproductive effort decreases as offspring dispersal rate increases. The result can be understood as follows: In a well-mixed population with global competition, neither adults nor juveniles compete with relatives, but in a patch-structured population with dispersal restricted to the juvenile phase, juveniles experience relatively less competition with relatives than adults, thus making juveniles relatively more valuable. Because this asymmetry between adults and juveniles decreases with the dispersal rate, so does the evolutionarily stable level of allocation to fecundity. Corresponding Editor: C. Boggs