Morphological & Physiological Correlates of Locomotor Performance

加兰9723758 该研究将检验蜥蜴运动性能种间变异的形态和生理决定因素的假设。这将构成对任何动物群体运动能力的第一个综合性、多层次研究。它将提供独特的信息有关的机制的起源生物多样性的性能能力。它也可能提供重要的线索，如何适应可以克服潜在的形态和生理的限制。由于所研究的蜥蜴在运动模式上相当普遍，因此研究结果也将为未来其他四足动物群体的研究提供重要的基线。 北美家庭成员Phrynosomatidae将被强调，因为这个群体是容易接近，并表现出显着的多样性生态，行为，运动能力和形态。将在电动跑步机上测量耐力跑步能力。最大短跑速度将在光电计时跑道上测量，这是一种既定的方法，也是在高速跑步机上测量。一系列可能影响速度，耐力，或两者兼而有之的性状将研究大约19种Phrynosomatidae和11个外群物种，包括身体大小，fimb和尾巴的比例，体温和肌纤维类型组成。

Garland 9723758 The proposed research will test hypotheses concerning the morphological and physiological determinants of interspecific variation in locomotor performance of lizards. This will constitute one of the first integrative, multilevel studies of locomotor abilities in any group of animals. It will provide unique information concerning the mechanisms underlying the origin of biological diversity in performance abilities. It may also provide important clues as to how adaptation can overcome potential morphological and physiological constraints. Because the lizards to be studied are fairly generalized in their locomotor modes, the results will also provide an important baseline for future investigations of other tetrapod groups. Members of the North American family Phrynosomatidae will be emphasized because this group is readily accessible and exhibits a remarkable diversity of ecology, behavior, locomotor abilities, and morphology. Endurance running capacity will be measured on a motorized treadmill. Maximal sprint running speed will be measured both on a photocell-timed racetrack, an established method, and on a high speed treadmill. A range of traits that probably affect speed, endurance, or both will be studied for approximately 19 species of Phrynosomatidae and 11 outgroup species, including body size, fimb and tail proportions, body temperature, and muscle fiber type composition.