Recovery from infection is more likely to favour the evolution of migration than social escape from infection
Recovery from infection is more likely to favour the evolution of migration than social escape from infection
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从感染中恢复比社会逃避感染更可能有利于移民的演变
DOI：
10.1111/1365-2656.13195
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发表时间：
2020
影响因子：
4.8
通讯作者：
Hoye, ed., Bethany
中科院分区：
文献类型：
--
作者：
Shaw, Allison K.;Binning, Sandra A.;Hoye, ed., Bethany
人们越来越认识到病原体和寄生虫感染是动物运动（包括迁徙）的强大驱动力。然而，与感染相关的移民好处可能是环境和/或社会条件综合作用的结果，这可能很难理清。在这里，我们重点关注两种有利于移民的与感染相关的机制：逃离感染和从感染中恢复。通过直接比较针对每种机制的迁移进化，我们可以评估在感染驱动的迁移中，改变非生物条件（与迁徙恢复相关）与改变社会条件（与迁徙逃逸相关）的可能重要性。我们建立了一个数学模型，并使用数值模拟的适应性动力学对其进行分析，以确定每次迁徙恢复和社会迁徙逃逸的迁徙应该何时演变。我们发现，在迁徙恢复下迁移的人口比例高于在社会迁徙逃逸下迁移的人口比例。我们还发现，两种不同的迁徙策略（例如，一些个体总是迁徙，而另一些个体只是偶尔迁徙）有时在具有社会迁徙逃逸的种群中共存，但从未与迁徙恢复共存。我们的结果表明，迁徙恢复更有可能促进迁徙行为的进化，而不是逃离受感染的同种（社会迁徙逃逸）。
Pathogen and parasite infections are increasingly recognized as powerful drivers of animal movement, including migration. Yet, infection‐related migration benefits can result from a combination of environmental and/or social conditions, which can be difficult to disentangle.Here, we focus on two infection‐related mechanisms that can favour migration: moving to escape versus recover from infection. By directly comparing the evolution of migration in response to each mechanism, we can evaluate the likely importance of changing abiotic conditions (linked to migratory recovery) with changing social conditions (linked to migratory escape) in terms of infection‐driven migration.We built a mathematical model and analysed it using numerically simulated adaptive dynamics to determine when migration should evolve for each migratory recovery and social migratory escape.We found that a higher fraction of the population migrated under migratory recovery than under social migratory escape. We also found that two distinct migratory strategies (e.g. some individuals always migrate and others only occasionally migrate) sometimes coexisted within populations with social migratory escape, but never with migratory recovery.Our results suggest that migratory recovery is more likely to promote the evolution of migratory behaviour, rather than escape from infected conspecifics (social migratory escape).