Rapid behavioural responses of native frogs caused by past predation pressure from invasive mongooses
Rapid behavioural responses of native frogs caused by past predation pressure from invasive mongooses
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入侵猫鼬过去的捕食压力引起本地青蛙的快速行为反应
DOI：
10.1111/jzo.12734
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发表时间：
2020
影响因子：
2
通讯作者：
Kaji K
中科院分区：
文献类型：
--
作者：
Komine H;Fukasawa K;Akasaka M;Watari Y;Iwai N;Kaji K
入侵的捕食者不仅会导致本地猎物种群的下降，而且还可以在短时间内诱导其行为的进化变化。然而，很少有研究报道这些快速反应。这可能是因为入侵物种强大的捕食压力往往会在进化效应被检测到之前导致本土猎物的灭绝。最近，根除项目成功地消除了入侵的捕食者，并导致了本地猎物的恢复。我们预测，快速反应可以通过评估具有不同历史的捕食者入侵的本地猎物种群的行为特征来检测。我们研究了日本奄美岛上一种本地青蛙奄美尖鼻蛙（Odorrana amamiensis）对入侵猫鼬（Herpestes auropunctatus）的行为反应。猫鼬减少了本地青蛙的数量;然而，根除项目导致了本地青蛙数量的恢复，从而提供了一个评估入侵物种进化影响的机会。我们假设，飞行起始距离（FID）的空间差异可以解释过去猫鼬捕食压力的空间格局。我们使用了一个基于广义最小二乘回归方法的空间模型来测试潜在因素对FID的影响。然后，我们进行模型比较和模型平均。我们发现，本地青蛙变得更加敏感的方法的潜在的捕食者的历史影响的猫鼬增加，这表明过去强大的捕食压力猫鼬驱动的快速行为反应在本地青蛙。我们的研究表明，其他本地物种的快速行为反应，不仅可以检测到成功的根除项目后，但也对目前入侵的网站与不同的入侵历史。
Invasive predators not only cause native prey populations to decline but can also induce evolutionary changes in their behaviour in a short time scale. However, few studies have reported these rapid responses. This could be because strong predation pressure by invasive species often causes the extinction of native prey before an evolutionary effect can be detected. Recently, eradication projects successfully removed invasive predators and resulted in the recovery of native prey. We predicted that rapid responses can be detected by evaluating the behavioural traits of native prey populations having different histories of predator invasion. We examined the behavioural responses of a native frog, the Amami tip‐nosed frog (Odorrana amamiensis), to an invasive mongoose (Herpestes auropunctatus) on Amami Island, Japan. The native frog population was reduced by the mongoose; however, the eradication project leads to the recovery of the native frog population, thereby providing an opportunity to evaluate the evolutionary impact of the invasive species. We hypothesized that spatial differences in flight initiation distance (FID) can be explained by spatial patterns of past mongoose predation pressure. We used a spatial model based on generalized least squares regression methods to test the effects of potential factors on FID. We then performed model comparison and model averaging. We found that the native frog became more sensitive to the approach of a potential predator as the historical impact of the mongoose increased, suggesting that past strong predation pressure by the mongoose drove a rapid behavioural response in the native frog. Our study suggests that rapid behavioural responses of other native species can be detected not only after successful eradication projects, but also on currently invaded sites with different invasion histories.
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DOI：
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DOI：
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发表时间：
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作者：
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