LARVAL PERFORMANCE AND OVIPOSITION SITE PREFERENCE ALONG A PREDATION GRADIENT
LARVAL PERFORMANCE AND OVIPOSITION SITE PREFERENCE ALONG A PREDATION GRADIENT
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沿着捕食梯度的幼虫表现和产卵地点偏好
DOI：
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发表时间：
2004
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影响因子：
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通讯作者：
W. J. Resetarits
中科院分区：
文献类型：
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作者：
Josef F. Rieger;Christopher A. Binckley;W. J. Resetarits
雌性评估后代栖息地质量的能力可以强烈影响个体繁殖成功以及种群动态和群落组装。然而，产卵地点选择和幼虫性能之间的具体关系往往是不清楚的。几种树蛙（Hyla）的产卵雌性避开捕食性鱼类。引起这种回避所需的鱼类密度及其与幼虫表现的关系是我们理解行为如何驱动复杂景观中的种群动态和群落组装的核心。我们进行了实验，调查产卵偏好和幼虫的性能在松林树蛙（Hylafemoralis）沿着密度梯度的捕食性鱼类（0-6 Umbra pygmaea）。女性H. femoralis检测到，并强烈避免了非致命的存在，即使是一个单一的2克鱼，产卵几乎完全在无捕食者的控制。在一个单独的实验中，幼虫的表现在很大程度上匹配成人的喜好，幼虫被完全消除，但最低的鱼密度。考虑到不同风险的繁殖地，产卵H。femoralis在行为上将可用的栖息地划分为有鱼和没有鱼的栖息地，这在很大程度上与相关的健身结果相匹配。
The ability of females to assess habitat quality for offspring can strongly influence individual reproductive success as well as population dynamics and community assembly. However, the specific relationship between oviposition site selection and larval performance is often unclear. Ovipositing females of several species of treefrogs (Hyla) avoid predatory fish. The fish density required to elicit such avoidance and its relationship to larval performance are central to our understanding of how behavior can drive population dynamics and community assembly in complex landscapes. We conducted experiments investigating both oviposition preference and larval performance in pinewoods treefrogs (Hyla femoralis) along a density gradient of predatory fish (0-6 Umbra pygmaea). Female H. femoralis detected and strongly avoided the nonlethal presence of even a single 2-g fish, ovipositing almost exclusively in predator-free controls. In a separate experiment, larval performance largely matched adult preferences; larvae were totally eliminated in all but the lowest fish density. Given a landscape of breeding sites of varying risks, ovipositing H. femoralis behaviorally partition available habitats into those with and without fish, largely matching the associated fitness consequences.