One and done: A single encounter with an invasive predator determines subsequent antipredator behavior of naive juvenile lizards

Travis R. Robbins , Tracy Langkilde
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引用次数: 0

Abstract

Plastic changes in behavior can allow animals to adapt to changes in their environment, but the adaptive role of rapid behavioral adjustments for surviving anthropogenically-induced environmental change is less well understood, especially with regard to behavioral plasticity facilitating the evolution of other traits. Here we examine the ability of lizards to rapidly acquire adaptive antipredator behavior following a single predator exposure. Fence lizards typically rely on crypsis to avoid predator detection, but this is maladaptive in the face of invasive venomous fire ants that can successfully locate and attack immobile lizards. Fire ant-naïve juvenile lizards shifted their behavior to flee from fire ant attack after a single encounter with these predatory ants. Our results provide evidence of rapid phenotypic accommodation to an environmental threat that likely played a role in population persistence after fire ant invasion and subsequent evolution of multiple traits.

一次与入侵掠食者的接触决定了幼稚的幼蜥随后的反掠食者行为
行为的可塑性变化可以使动物适应环境的变化,但人类活动引起的环境变化对快速行为调整的适应性作用知之甚少,特别是在促进其他特征进化的行为可塑性方面。在这里,我们研究了蜥蜴在单一捕食者暴露后迅速获得适应性反捕食者行为的能力。栅栏蜥蜴通常依靠隐蔽来避免捕食者的发现,但面对入侵的有毒火蚁,这是不适应的,火蚁可以成功地定位和攻击不移动的蜥蜴。火蜥蜴ant-naïve幼蜥蜴在遇到这些掠食性蚂蚁后改变了它们的行为以逃离火蚁的攻击。我们的研究结果提供了对环境威胁的快速表型适应的证据,这种适应可能在火蚁入侵后的种群持久性和随后的多种性状进化中发挥了作用。
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