Predator-induced plasticity in tadpoles of Polypedates cruciger (Anura: Rhacophoridae)
Predator-induced plasticity in tadpoles of Polypedates cruciger (Anura: Rhacophoridae)
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捕食者诱导的 Polypedates cruciger（无尾：Rhacophoridae）蝌蚪的可塑性
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
M. Meegaskumbura
中科院分区：
文献类型：
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作者：
Krishan Ariyasiri;G. Bowatte;Udeni Menike;Suyama Meegaskumbura;M. Meegaskumbura
水生蝌蚪在形态上以各种方式对捕食者的存在做出反应。根据捕食者的类型，蝌蚪在加速、机动性和速度方面发展了增强的逃避反应能力，这些能力与一系列形态特征相关，如更宽、更长和更健壮的尾巴相关尺寸。在远离水的地方产卵，比如在树栖泡沫巢中，部分发育的蝌蚪从那里落入水中，这可能是捕食者避开卵和早期蝌蚪阶段的一种适应。由于捕食是值得关注的，即使是这些部分发育的幼虫，我们试图检测捕食者诱导的形态反应（如果有的话），这些形式相比，完全水生蝌蚪。我们暴露的蝌蚪泡沫嵌套Polypedates cruciger的一种天然的鱼类捕食者，Belontia signata。我们发现，在早期（戈斯纳阶段29-32）阶段，蝌蚪暴露于这种捕食者开发一个更大的身体尺寸和增加尾长相关的尺寸。
Aquatic tadpoles morphologically respond to presence of predators in various ways. Depending on the type of predator, tadpoles develop enhanced escape response abilities in accel- eration, maneuverability, and speed, and these are correlated to suites of morphological characters, such as wider, longer, and robust tail related dimensions. Laying eggs away from water, such as in an arboreal foam nest from which partially developed tadpoles fall into water, could be an adapta- tion for predator avoidance of eggs and early tadpole stages. Since predation is of concern, even for these partially developed larvae, we sought to detect predator-induced morphological response (if any) of these forms compared to fully aquatic tadpoles. We exposed the tadpoles of foam-nesting Polypedates cruciger to a natural fish predator, Belontia signata. We show that at an early (Gosner stage 29-32) stage, tadpoles exposed to this predator develop a larger body size and increased tail- length related dimensions.