Does 'gliding while gravid' explain Rensch's rule in flying lizards?. Husak, J. F. & McGuire, J. A. Biological Journal of the Linnean Society, 113(1):270–282, September, 2014. WOS:000340585700021doi abstract bibtex Among species with sexual size dimorphism (SSD), taxa in which males are the larger sex have increasing SSD with increasing body size, whereas in taxa in which females are the larger sex, SSD decreases with body size: Rensch's rule. We show in flying lizards, a clade of mostly female-larger species, that SSD increases with body size, a pattern similar to that in clades with male-biased SSD or more evenly mixed SSD. The observed pattern in Draco appears due to SSD increasing with evolutionary changes in male body size; specifically divergence in body size among species that are in sympatric congeneric assemblages. We suggest that increasing body size, resulting in decreased gliding performance, reduces the relative gliding cost of gravidity in females, and switches sexual selection in males away from a small-male, gliding advantage and toward selection on large size and fighting ability as seen in many other lizards. Thus, selection for large females is likely greater than selection for large males at the smaller end of the body size continuum, whereas this relationship reverses for species at the larger end of the continuum. (C) 2014 The Linnean Society of London,
@article{husak_does_2014,
title = {Does 'gliding while gravid' explain {Rensch}'s rule in flying lizards?},
volume = {113},
issn = {0024-4066},
doi = {10.1111/bij.12319},
abstract = {Among species with sexual size dimorphism (SSD), taxa in which males are the larger sex have increasing SSD with increasing body size, whereas in taxa in which females are the larger sex, SSD decreases with body size: Rensch's rule. We show in flying lizards, a clade of mostly female-larger species, that SSD increases with body size, a pattern similar to that in clades with male-biased SSD or more evenly mixed SSD. The observed pattern in Draco appears due to SSD increasing with evolutionary changes in male body size; specifically divergence in body size among species that are in sympatric congeneric assemblages. We suggest that increasing body size, resulting in decreased gliding performance, reduces the relative gliding cost of gravidity in females, and switches sexual selection in males away from a small-male, gliding advantage and toward selection on large size and fighting ability as seen in many other lizards. Thus, selection for large females is likely greater than selection for large males at the smaller end of the body size continuum, whereas this relationship reverses for species at the larger end of the continuum. (C) 2014 The Linnean Society of London,},
language = {English},
number = {1},
journal = {Biological Journal of the Linnean Society},
author = {Husak, Jerry F. and McGuire, Jimmy A.},
month = sep,
year = {2014},
note = {WOS:000340585700021},
keywords = {Draco, adaptive radiation, bite-force performance, body-size, draco-volans-sumatranus, green anole lizard, habitat use, head shape, lacertid lizards, lizard, selection, sexual dimorphism, sexual size dimorphism, wing loading},
pages = {270--282}
}
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