Morphology of the feeding system in agamid lizards: Ecological correlates
Morphology of the feeding system in agamid lizards: Ecological correlates
复制标题
蜥蜴摄食系统的形态：生态相关性
DOI：
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复制
发表时间：
1999
期刊：
影响因子：
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通讯作者：
F. de Vree
中科院分区：
文献类型：
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作者：
A. Herrel;P. Aerts;Jeannine Fret;F. de Vree
有机体设计与生态学的相互作用及其进化发展是许多功能和生态形态研究的主题。许多研究表明，哺乳动物咀嚼器官的形态和力学机制是适应饮食的。为了研究食性与蜥蜴颌部系统形态和生理特性的关系，对食虫性蜥蜴Plocederma Stellio和与之关系密切的食草性蜥蜴Uromastix属的颌器结构进行了详细的分析。采用解剖、光学显微镜、组织化学特征和活体刺激实验等方法，研究了日本对虾和埃及斑潜蝇颌骨系统的形态和生理特性。Uromastix的头骨似乎是为用力咬人而建造的(高而短的鼻子)。此外，在P.Stellio中，翼状肌被修改，导致在静态咬合时产生额外的力分量。刺激实验表明，这两个物种的颌肌都很快，这一点得到了组织化学染色的支持。然而，Uromastix的颌肌的氧化能力更大。进给系统的收缩特性和性能(力输出)明显依赖于热。我们的结论是，Uromastix的颌骨系统的几个特征(翼状肌的额外部分的存在，颌肌的大氧化能力)可能归因于它的食草性饮食。然而，下颌肌肉的速度仍然比预期的要快。这可能是颌骨内收肌的热特征和这些动物的食草性生活方式之间权衡的结果。Anat Rec 254：496-507,1999。©1999 Wiley-Liss，Inc.
The interaction of organismal design with ecology, and its evolutionary development are the subject of many functional and ecomorphological studies. Many studies have shown that the morphology and mechanics of the masticatory apparatus in mammals are adapted to diet. To investigate the relations between diet and the morphological and physiological properties of the lizard jaw system, a detailed analysis of the structure of the jaw apparatus was undertaken in the insectivorous lizard Plocederma stellio and in closely related herbivorous lizards of the genus Uromastix. The morphological and physiological properties of the jaw system in P. stellio and U. aegyptius were studied by means of dissections, light microscopy, histochemical characterisations, and in vivo stimulation experiments. The skull of Uromastix seems to be built for forceful biting (high, short snout). Additionally, the pterygoid muscle is modified in P. stellio, resulting in an additional force component during static biting. Stimulation experiments indicate that jaw muscles in both species are fast, which is supported by histochemical stainings. However, the oxidative capacity of the jaw muscles is larger in Uromastix. Contraction characteristics and performance of the feeding system (force output) are clearly thermally dependent. We conclude that several characteristics of the jaw system (presence of extra portion of the pterygoid muscle, large oxidative capacity of jaw muscles) in Uromastix may be attributed to its herbivorous diet. Jaw muscles, however, are still faster than expected. This is presumably the result of trade‐offs between the thermal characteristics of the jaw adductors and the herbivorous lifestyle of these animals. Anat Rec 254:496–507, 1999. © 1999 Wiley‐Liss, Inc.
DOI：
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发表时间：
1997-11
期刊：
The Journal of experimental biology
影响因子：
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作者：
M. M. Peplowski-M.;Richard L. Marsh
通讯作者：
M. M. Peplowski-M.;Richard L. Marsh
DOI：
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发表时间：
1993
期刊：
The Journal of Experimental Biology
影响因子：
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作者：
T. P. Johnson;S. Swoap;A. F. Bennett;R. Josephson
通讯作者：
T. P. Johnson;S. Swoap;A. F. Bennett;R. Josephson