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Predator mediated selection and the impact of developmental stage on viability in wood frog tadpoles (Rana sylvatica)

机译:捕食者介导的选择及其发育阶段对蛙蛙(Rana sylvatica)生存力的影响

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摘要

BackgroundComplex life histories require adaptation of a single organism for multiple ecological niches. Transitions between life stages, however, may expose individuals to an increased risk of mortality, as the process of metamorphosis typically includes developmental stages that function relatively poorly in both the pre- and post-metamorphic habitat. We studied predator-mediated selection on tadpoles of the wood frog, Rana sylvatica, to identify this hypothesized period of differential predation risk and estimate its ontogenetic onset. We reared tadpoles in replicated mesocosms in the presence of the larval odonate Anax junius, a known tadpole predator.
机译:背景复杂的生活史要求单个生物适应多个生态位。然而,生命阶段之间的过渡可能使个体面临更高的死亡风险,因为变态过程通常包括在变质前和变质后生境中功能相对较弱的发育阶段。我们研究了食蛙介导的selection蛙蛙蛙的选择,以识别这种假设的差异性捕食风险时期,并估计其个体发育开始时间。我们在存在已知的pre捕食者的幼体齿状齿酸盐Anax junius的情况下,在复制的介体中饲养了t。

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