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2 results for “Rhoptropus afer”
Data from: Subdigital adhesive pad morphology varies in relation to structural habitat use in the Namib Day Gecko, Rhoptropus afer
1. Morphological features that lead to increased locomotor performance, such as faster sprint speed, are thought to evolve in concert with habitat use. The latter depends on available habitat structure, and how the animal moves within that habitat. Thus, this behavioral variation will impact how natural selection acts on locomotion and morphology. 2. Quantifying the interplay between escape behavior and locomotor morphology across habitats that vary in structural composition could reveal how selection acts on locomotion at local levels. Substrate features, such as incline and topographical variation, are likely key drivers of morphological and functional disparity among terrestrial animals. We investigated the impact of habitat variation and escape behavior on morphology, including the adhesive system, of Rhoptropus afer, a diurnal and cursorial gecko from Namibia. Substrate incline and topographical variation are likely important for this pad-bearing gecko due to the trade-off between adhering and sprinting (i.e. using adhesion results in decreased sprint speed) that is triggered by certain inclines. 3. We corroborate the hypothesis that the adhesive system exhibits the greatest degree of reduction in populations that utilize the flattest terrain during an escape. Our findings suggest that the adhesive apparatus is detrimental to rapid for locomotion on relatively horizontal surfaces, and may thus be counterproductive to the evasion of predators in such situations. A broad scale analysis of geckos would determine whether diversity of adhesive morphology is driven primarily by habitat use. 4. Phenotypic plasticity of the adhesive system and interspecific competition are plausible candidates for driving our results. However, it is unclear whether the differences we observed have a genetic basis. Future work should focus on how variation of the adhesive system impacts downstream locomotor components such as kinematics and mechanics, and how the integration of these traits is related to habitat use.
Data from: Subdigital adhesive pad morphology varies in relation to structural habitat use in the Namib Day Gecko, Rhoptropus afer
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