Fitness costs and benefits of antipredator behavior mediated by chemotactile cues in the wolf spider Pardosa milvina (Araneae: Lycosidae)
Fitness costs and benefits of antipredator behavior mediated by chemotactile cues in the wolf spider Pardosa milvina (Araneae: Lycosidae)
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DOI：
10.1093/beheco/13.3.386
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发表时间：
2002-05
影响因子：
2.4
通讯作者：
M. Persons;S. E. Walker;A. Rypstra
中科院分区：
文献类型：
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作者：
M. Persons;S. E. Walker;A. Rypstra
动物可能会表现出各种防御行为的存在间接捕食线索。这种行为提供了直接的健身效益，但也可能产生大量的觅食和繁殖成本。我们测量的变化空间使用（垂直攀爬）的狼蛛Pardosa millions诱导的化学触觉线索（丝和排泄物）从一个共同发生的捕食性狼蛛Hogna helluo。然后，我们测量了这种行为的觅食和繁殖成本，以及生存效益。对于2周，我们保持交配的成年雌性豹蛛在塑料容器中与三个处理泥炭藓基板之一：一个容器先前占据的同种3天，一个容器先前占据的成年Hogna为3天，和一个容器没有任何线索（对照）。我们测量了猎物捕获效率，身体状况，卵囊生产，卵囊重量，和鸡蛋数量的个人在每个处理。我们还计算了在有和没有蛛丝和排泄物线索的活的Hogna存在下存活并表现出攀爬行为的Pardosa的数量。与其他处理相比，在存在Hogna丝和排泄物的情况下，Pardosa爬上容器壁的次数明显更多。暴露于Hogna线索加上活Hogna的Pardosa比没有捕食者线索的蜘蛛存活得更长。Pardosa放置在容器与Hogna线索，但没有Hogna，减肥更快，吃更少的猎物，在较差的身体状况，产生更轻的卵囊，并产生更少的鸡蛋比蜘蛛在控制或同种治疗。版权所有2002年。
Animals may exhibit a variety of defensive behaviors in the presence of indirect predator cues. Such behavior offers immediate fitness benefits but may also incur substantial foraging and reproductive costs. We measured shifts in space use (vertical climbing) by the wolf spider Pardosa milvina induced by chemotactile cues (silk and excreta) from a co-occurring predatory wolf spider Hogna helluo. We then measured foraging and reproductive costs, as well as survival benefits, of this behavior. For 2 weeks, we maintained mated adult female Pardosa in plastic containers with one of three treated peat moss substrates: a container previously occupied by a conspecific for 3 days, a container previously occupied by an adult Hogna for 3 days, and a container devoid of either cue (control). We measured prey capture efficiency, body condition, egg sac production, egg sac weight, and egg number for individuals in each treatment. We also counted the number of Pardosa that survived and exhibited climbing behavior in the presence of a live Hogna with and without silk and excreta cues. Pardosa climbed container walls significantly more often in the presence of Hogna silk and excreta relative to other treatments. Pardosa exposed to Hogna cues coupled with live Hogna survived significantly longer than spiders that had no predator cues available. Pardosa placed in containers with Hogna cues, but no Hogna, lost weight more quickly, ate fewer prey, were in poorer body condition, produced lighter egg sacs, and produced fewer eggs than spiders in control or conspecific treatments. Copyright 2002.