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首页> 外文期刊>Ethology >Mother Cottonmouths (Agkistrodon piscivorus) Alter Their Antipredator Behavior in the Presence of Neonates
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Mother Cottonmouths (Agkistrodon piscivorus) Alter Their Antipredator Behavior in the Presence of Neonates

机译：棉口茅（Agkistrodon piscivorus）在新生儿的存在下改变其反捕食行为

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Neonate-directed care is rare in non-avian reptiles, but female pitvipers attend their young for a period of time after birth. One of the primary functions of parental care is the protection of offspring from predators, and parents of diverse taxa are able to modulate their antipredator behavior in the presence of offspring. To test the hypothesis that the antipredator behavior of post-parturient pitvipers is altered during neonate attendance, we conducted behavioral trials on female cottonmouths (Agkistrodon piscivorus) in which we measured female response to a simulated predator encounter. Cottonmouths were divided into three treatment groups: (1) post-parturient, attending neonates; (2) post-parturient, not attending neonates; and (3) non-reproductive. All females were subjected to a second trial approximately 3 wk later, when females in Group 1 were no longer attending neonates. When mothers were attending offspring, they were more hesitant to engage the predator and exhibited more warning than aggressive behaviors once they did, relative to non-attending and non-reproductive females. When these same mothers were no longer attending offspring, they significantly increased their antipredator behavior by engaging the predator quickly and displaying more aggressive than warning behaviors. This change in behavior was not observed in post-parturient females who did not have neonates present during either trial, nor was it observed in non-reproductive females, indicating that the presence of neonates directly affected the antipredator behavior of attending females. We discuss hypotheses concerning the possible adaptive value of reduced antipredator behavior in female pitvipers attending neonates
机译：在非禽类爬行动物中很少有新生儿指导的护理，但是雌性产仔在出生后的一段时间内会照看他们的幼崽。父母关怀的主要功能之一是保护后代免受掠食者的侵害，不同分类群的父母能够在有后代的情况下调节其反掠食者的行为。为了检验假胎仔的抗掠食者行为在新生儿出勤期间发生改变的假设，我们对雌性棉嘴（Agkistrodon piscivorus）进行了行为试验，其中我们测量了雌性对模拟捕食者遭遇的反应。棉口分为三个治疗组：（1）产后产后新生儿。 （2）产后不参加新生儿; （3）非生殖。大约3周后，当第1组的女性不再参加新生儿时，所有女性均接受了第二次审判。当母亲照料后代时，相对于没有照料和没有生育能力的母性而言，与采取侵略性行为相比，他们更犹豫要与捕食者交往，并且表现出更多的警告。当这些相同的母亲不再参加后代时，他们通过迅速吸引掠食者并表现出比警告行为更具攻击性的方式，大大提高了其反掠食者的行为。在两次试验中都没有新生儿的产后女性中，未观察到这种行为变化，在非生殖女性中也未观察到这种变化，这表明新生儿的存在直接影响了参与研究的女性的抗捕食者行为。我们讨论假说，关于在参加新生儿的女性夫中减少反掠夺者行为的可能适应性价值

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