Safety in coils: predation rates of ambush hunting rattlesnakes are extremely low

Safety in coils: predation rates of ambush hunting rattlesnakes are extremely low
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盘绕安全:伏击响尾蛇的捕食率极低

DOI:
10.1163/15685381-bja10101
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发表时间:
2022
期刊:
影响因子:
1.6
通讯作者:
Clark, Rulon
Clark, Rulon
中科院分区:
生物学3区
文献类型:
--
作者:
Maag, Dylan;Clark, Rulon

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响尾蛇是分布广泛的中食动物,它们自己被许多其他捕食者杀死和吃掉,包括猛禽和食肉哺乳动物。虽然关于响尾蛇捕食的轶事很常见,但关于响尾蛇与其捕食者之间遭遇率的定量数据很少。在这里,我们回顾了一个大型数据库的响尾蛇和他们的捕食者之间的遭遇记录从现场录像的蛇在静坐和等待阶段的伏击狩猎策略。我们发现,在8300小时的观察中,六个物种和多个种群的成年响尾蛇与捕食者的相遇率很低;此外,当捕食者遇到时,我们从未观察到它们攻击或杀死盘绕的蛇。因此,我们认为响尾蛇在执行其他与穿越景观相关的风险更高的行为时被捕食。我们还讨论了为什么响尾蛇在水面上捕食的风险很低。
Rattlesnakes are widespread mesopredators that are themselves killed and eaten by a host of other predators, including birds of prey and carnivorous mammals. Although anecdotal accounts of rattlesnake depredation are common, there are few quantitative data on encounter rates between rattlesnakes and their predators. Here we review a large database of encounters between rattlesnakes and their predators recorded from field videography of snakes in the sit-and-wait phase of their ambush hunting strategy. We found that, across 8300 hours of observation, adult rattlesnakes of six species and multiple populations exhibit low encounter rates with predators; furthermore, when predators were encountered, we never observed them to attack or kill coiled snakes. Thus, we propose that rattlesnakes are preyed upon while performing other, riskier behaviors associated with moving through the landscape. We also discuss why rattlesnakes are at low risk of predation while hunting on the surface.
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