... that the original work is properly attributed. Summary: Behavioral antipredator response in chameleons is predicted by both the functional capacity to perform these behaviors and the immediate environmental context for that individual. Sprint speed Bite force Crypsis Performance Predation...

... of discrete severities. The costs and consequences of the immune response were assessed through comparisons of change in resting metabolic rate (RMR), energy metabolites (glucose, glycerol, triglycerides), innate immunity (bactericidal ability), sprint speed and oxidative status (antioxidant capacity...

... and individual behavior. We examined some of these complexities in the morphology–performance–fitness paradigm, primarily the impact that substrate variation has on performance. We measured maximal sprint speed of green anole lizards on four substrates that varied in size and complexity and are used...

... not show post-training differences in sprint speed. Although acclimation to the laboratory environment and training explain some of our results, mechanistic explanations for these results correspond with the observed performance differences. After training, endurance-trained lizards had higher haematocrit...

... sprinting on an incline. Females, however, showed no evidence of this trade-off on either flat or inclined surfaces. The sex specificity of this trade-off suggests that the sexes differ in their optimal strategies for dealing with the conflicting requirements of bite force and sprint speed. Unlike males...

...-muscle mice would have a lower whole-animal energy cost of transport (COT), resulting from lower costs of cycling their lighter limbs, and reduced sprint speed, from reduced maximal force production. We measured sprint speed on a racetrack and slopes(incremental COT, or iCOT) and intercepts...

..., implying some unknown advantage to bipedal locomotion. * Author for correspondence (e-mail: [email protected] ) 17 4 2008 © The Company of Biologists Limited 2008 2008 bipedal sprint speed acceleration endurance locomotion agamids dragon lizards Bipedalism has been...

...K. Mark Wooden; Glenn E. Walsberg SUMMARY We quantify the locomotor capacity of the round-tailed ground squirrel( Spermophilus tereticaudus ), a mammal that can lower energetic costs by relaxing thermoregulatory limits without becoming inactive. We measured maximum sprint speed, maximum limb...

... species which differed in leg length and perch use in nature. We measured maximum sprint speed on rods of several sizes. Longer-legged species ran faster on thick rods. The speed of all species declined on thinner rods, but long-legged species were affected to a greater extent in that all species ran...