Explanation for Missing Limbs in Deformed Amphibians
Explanation for Missing Limbs in Deformed Amphibians
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DOI：
10.1002/jez.b.21296
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发表时间：
2009-11-15
影响因子：
2.2
通讯作者：
Sessions, Stanley K.
中科院分区：
文献类型：
--
作者：
Ballengee, Brandon;Sessions, Stanley K.
我们目前的证据表明，最常见的畸形野生捕获两栖动物，那些具有失踪的肢体和失踪的肢体节，可能是选择性捕食的结果。在这里，我们报告说，掠夺性的龙可以严重伤害，甚至完全截肢发展后肢的无尾类蝌蚪。受伤/截肢的蝌蚪肢体的发育反应范围从完全再生到无再生，中间条件由各种特异质肢体畸形代表，主要取决于受伤/截肢时蝌蚪的发育阶段。这些发现得到了无尾两栖类蝌蚪后肢实验截肢，导致类似的畸形。我们的研究表明，在两栖动物自然种群中发现的最常见的肢体畸形中，两栖动物和其他水生捕食者的选择性捕食可能起着重要的作用。J. Exp. Zool.（Mol. Dev. Evol.）312 B：770-779，2009年。(C)2009 Wiley-Liss，Inc.
We present evidence that the most commonly found deformities in wild-caught amphibians, those featuring missing limbs and missing limb segments, may be the result of selective predation. Here we report that predatory dragonfly nymphs can severely injure and even fully amputate developing hind limbs of anuran tadpoles. Developmental responses of the injured/amputated tadpole limbs range from complete regeneration to no regeneration, with intermediate conditions represented by various idiosyncratic limb deformities, depending mainly on the developmental stage of the tadpole at the time of injury/amputation. These findings were reinforced by experimental amputations of anuran tadpole hind limbs that resulted in similar deformities. Our studies suggest that selective predation by dragonfly nymphs and other aquatic predators may play a significant role in the most common kinds of limb deformities found in natural populations of amphibians. J. Exp. Zool. (Mol. Dev. Evol.) 312B:770-779, 2009. (C) 2009 Wiley-Liss, Inc.