Estimating encounter rates as the first step of sexual selection in the lizard Anolis sagrei

Proceedings. Biological Sciences
Ambika Kamath, Jonathan B Losos

Abstract

How individuals move through their environment dictates which other individuals they encounter, determining their social and reproductive interactions and the extent to which they experience sexual selection. Specifically, females rarely have the option of mating with all males in a population-they can only choose among the males they encounter. Further, quantifying phenotypic differences between the males that females encounter and those that sire females' offspring lends insight into how social and reproductive interactions shape male phenotypes. We used an explicitly spatio-temporal Markov chain model to estimate the number of potential mates of Anolis sagrei lizards from their movement behaviour, and used genetic paternity assignments to quantify sexual selection on males. Females frequently encountered and mated with multiple males, offering ample opportunity for female mate choice. Sexual selection favoured males that were bigger and moved over larger areas, though the effect of body size cannot be disentangled from last-male precedence. Our approach corroborates some patterns of sexual selection previously hypothesized in anoles based on describing them as territorial, whereas other results, including female multiple mat...Continue Reading

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Citations

Jul 18, 2019·Oecologia·Katherine A Culbertson, Nicholas C Herrmann
Nov 20, 2019·Nature Ecology & Evolution·Julia D MonkCaitlin E McDonough
Mar 9, 2019·Behavioral Ecology : Official Journal of the International Society for Behavioral Ecology·Ambika KamathJonathan N Pruitt
Aug 11, 2020·Movement Ecology·Benjamin Michael MarshallMatt Goode
Jun 3, 2021·Integrative and Comparative Biology·Michele A JohnsonJonathan B Losos

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