Variability within families and the evolution of body-condition-dependent dispersal
Variability within families and the evolution of body-condition-dependent dispersal
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DOI：
10.1080/17513758.2010.519403
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发表时间：
2011-01-01
影响因子：
2.8
通讯作者：
Utz, Margarete
中科院分区：
文献类型：
--
作者：
Gyllenberg, Mats;Kisdi, Eva;Utz, Margarete
在一个群体中，身体状况不同的家庭之间和内部，我们调查的身体状况（“强度”，如身体大小）的函数的扩散的演变。在加权彩票中，强壮的个体是更好的竞争者。如果身体状况不影响扩散过程中的生存，那么就不存在唯一的进化稳定策略。相反，有无限多的分散策略，所有导致相同的非分散重量在一个补丁。这些策略都是选择性中性的，但决定了身体状况和处置概率之间的巨大差异。这可以解释为什么在实证研究中发现身体状况和扩散之间没有一致的模式。如果身体状况影响扩散过程中的生存，那么中立性被移除，具有较高生存概率的个体分散。如果较小的体型有助于避免分散风险，则分散者可能是竞争力较弱的个体。
In a population where body condition varies between and within families, we investigate the evolution of dispersal as a function of body condition ('strength', e.g. body size). Strong individuals are better competitors in a weighted lottery. If body condition does not influence survival during dispersal, then there is no unique evolutionarily stable strategy. Instead, there are infinitely many dispersal strategies that all lead to the same non-dispersing weight in a patch. These strategies are all selectively neutral but determine wildly different relationships between body condition and disposal probability. This may explain why there is no consistent pattern between body condition and dispersal found in empirical studies. If body condition influences survival during dispersal, then neutrality is removed and individuals with higher survival probability disperse. Dispersal may be the competitively weaker individuals if smaller body size helps to avoid dispersal risks.