期刊
BEHAVIORAL ECOLOGY
卷 31, 期 4, 页码 978-991出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/beheco/araa044
关键词
behavioral activity; chemical signal; femoral secretion; habitat temperature; Sceloporus; volatile organic compounds
资金
- National Science Foundation [IOS-1050274, IOS-1052247]
- Common Themes in Reproductive Diversity training grant (National Institutes of Health -National Institute of Child Health and Human Development) [5T32HD049336-10]
- NextGen Postdoctoral Fellowship through Georgia State University
- Center for Behavioral Neuroscience
Animal signals evolve by striking a balance between the need to convey information through particular habitats and the limitations of what types of signals can most easily be produced and perceived. Here, we present new results from field measures of undisturbed behavior and biochemical analyses of scent marks from 12 species of Sceloporus lizards to explore whether evolutionary changes in chemical composition are better predicted by measures of species behavior, particularly those associated with visual displays, chemoreception, and locomotion, or by measures of habitat climate (precipitation and temperature). We found that more active lizard species used fewer compounds in their volatile scent marks, perhaps conveying less specific information about individual and species identity. Scent marks from more active lizard species also had higher proportions of saturated fatty acids, and the evolution of these compounds has been tracking the phylogeny closely as we would expect for a metabolic byproduct. In contrast, the proportions of unsaturated fatty acids were better explained by evolutionary shifts in habitat temperature (and not precipitation), with species in warmer climates using almost no volatile unsaturated fatty acids. The proportion of aldehydes was explained by both behavior and environment, decreasing with behavioral activity and increasing with habitat temperature. Our results highlight the evolutionary flexibility of complex chemical signals, with different chemical compounds responding to different elements of the selective landscape over evolutionary time.
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