10.5061/DRYAD.QRFJ6Q5H2
Juarez, Bryan
0000-0002-5474-596X
Iowa State University
Adams, Dean
0000-0001-9172-7894
Iowa State University
Evolutionary allometry of sexual dimorphism of jumping performance in anurans
Dryad
dataset
2021
FOS: Biological sciences
Phylogenetic Comparative Methods (PCM)
microhabitat
National Science Foundation
https://ror.org/021nxhr62
1744592
National Science Foundation
https://ror.org/021nxhr62
1902511
2021-10-11T00:00:00Z
2021-10-11T00:00:00Z
en
https://doi.org/10.1007/s10682-021-10132-x
420173 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Sexual dimorphism is a common feature in animals, yet the degree of sexual
dimorphism is not constant across taxa. Sometimes the magnitude of sexual
dimorphism varies systematically with body size, resulting in evolutionary
allometry of sexual dimorphism. While such patterns are commonly
investigated for traits such as overall size, allometric variation in
sexual dimorphism of other traits remains underexplored. Here, we
characterize the evolutionary allometry of sexual dimorphism in a
functional phenotypic trait (jumping performance) in anurans. Using
morphology and anatomical approximations of jumping performance across 146
species, we test for evidence of the correlated selection model of sexual
dimorphism evolution. We analyze patterns of evolutionary allometry of
sexual dimorphism in key phenotypic traits, including: body size
(snout-vent length and mass), relative leg length, relative leg muscle
volume, mass-specific peak jumping energy, and peak jumping velocity. We
find that as previously reported, sexual size dimorphism scales
isometrically between species and is independent of sexual dimorphism in
jumping performance. Notably, however, we found significant trends in the
evolutionary allometry of sexual dimorphism in relative limb length, and
in two components of jumping performance. Additionally, we found greater
rates of evolution for females versus males in relative limb length, but
not jumping performance. We also observed that the allometric trends in
limb length dimorphism were related to performance allometry. Sexual
dimorphism in jumping performance increased in species with high
performance while females in high performance species displayed increased
relative limb length. Thus, we hypothesize that selection acting on
functional performance explains allometric patterns of sexual dimorphism
in morphology. We discuss biological implications of our findings in
relation to natural and sexual selection. This study highlights the types
of insights one may gain by studying the allometry of sexual dimorphism
from a functional perspective to learn about both patterns and processes
in evolution.
Anatomical data were obtained from museum specimens and microhabitat data
were obtained from online databases and the literature. Please see
original manuscript for details on several ways in which the data were
filtered.
Raw values included here do not represent final values analyzed in the
manuscript. Please see original manuscript for details. Some missing
values are included, which are accounted for in the analyses, please see
manuscript.