Experimental addition of cover lowers the perception of danger and increases reproduction in meadow voles (Microtus pennsylvanicus)
Experimental addition of cover lowers the perception of danger and increases reproduction in meadow voles (Microtus pennsylvanicus)
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实验性增加覆盖物降低了草地田鼠（Microtus pennsylvanicus）的危险感知并增加了繁殖
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
L. Dill
中科院分区：
文献类型：
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作者：
M. M. Dehn;R. Ydenberg;L. Dill
对于小型哺乳动物来说，捕食危险是普遍存在的，预计会强烈选择降低风险的行为策略。特别是，由于它可能被认为是繁殖的成本，捕食危险预计将影响繁殖努力的水平。我们在野外围栏的半自然条件下，在草甸田鼠(Microtus pennsylvanicus(Ord，1815))种群中测试了这一假说。我们通过调整可用盖度和测量食物块中的放弃密度(GUD)来操纵田鼠对捕食危险的感知，以验证高盖度和低盖度处理对危险的感知不同。不同处理在实际捕食率、田鼠密度、食物的数量和质量上没有不同。在实验期间，我们测量了田鼠繁殖努力的指标，包括活动(电子探测器)、觅食强度(粪便板)和产卵数量(诱杀)。高盖度(低危险)处理的田鼠更活跃，更容易受到伤害。
Predation danger is pervasive for small mammals and is expected to select strongly for behavioural tactics that reduce the risk. In particular, since it may be considered a cost of reproduction, predation danger is expected to affect the level of reproductive effort. We test this hypothesis in a population of meadow voles (Microtus pennsylvanicus (Ord, 1815)) under seminatural conditions in field enclosures. We manipulated the voles’ perception of predation danger by adjusting the available cover and measured giving up density (GUD) in food patches to verify that the perception of danger differed between high- and low-cover treatments. Treatments did not differ in actual predation rate, in vole density, or in the quantity or quality of food. During the experiments, we measured indices of vole reproductive effort including activity (electronic detectors), foraging intensity (fecal plates), and the number of young produced (livetrapping). Voles in the high-cover (lower danger) treatments were more active, f...