Fight versus flight:: physiological basis for temperature-dependent behavioral shifts in lizards
Fight versus flight:: physiological basis for temperature-dependent behavioral shifts in lizards
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DOI：
10.1242/jeb.003426
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发表时间：
2007-05-15
影响因子：
2.8
通讯作者：
Van Damme, R.
中科院分区：
文献类型：
--
作者：
Herrel, A.;James, R. S.;Van Damme, R.
先前的研究表明，一些蜥蜴在低温下会发生从逃跑到攻击的行为转变。我们对agamid蜥蜴Trapelus pallida的数据表明，温度如何影响整个生物体的性能特征，如冲刺速度（在较低的温度下性能更低）和咬合力（在很大程度上与温度无关），这可以解释温度降低时从飞行到战斗行为的转变。此外，我们的数据暗示了这种效应的生理基础，因为与短跑相关的孤立肌肉力量输出、抽搐和破伤风时间特征似乎强烈依赖于温度的肌肉特性。另一方面，最大肌肉力量的产生似乎在很大程度上与温度无关。出乎意料的是，观察到颌骨与肢体肌肉生理特性的差异，增强了颌骨肌肉在所有测试温度下产生最大力量的能力。因此，我们的数据表明，行为反应可能是由温度对生理过程的限制所决定的。
Previous studies have demonstrated that a behavioral shift from flight to aggressive behavior occurs at low temperatures in some lizards. Our data for the agamid lizard Trapelus pallida demonstrate how the effect of temperature on whole organism performance traits such as sprint speed ( much lower performance at lower temperature) and bite force ( largely independent of temperature) may explain the shift from flight to fight behavior with decreasing temperature. Moreover, our data hint at the physiological basis for this effect as isolated muscle power output, twitch and tetanus time traits, relevant to sprinting, appear to be strongly temperature dependent muscle properties. Maximal muscle force production, on the other hand, appears largely independent of temperature. Unexpectedly, differences in the physiological properties of jaw versus limb muscle were observed that enhance the ability of the jaw muscle to generate maximal force at all temperatures tested. Thus our data show how behavioral responses may be determined by the limitations set by temperature on physiological processes.