10.5061/DRYAD.0P2NGF1W4
Cattelan, Silvia
0000-0002-6303-8810
University of Padua
Evans, Jonathan P.
University of Western Australia
Garcia-Gonzalez, Francisco
0000-0001-9515-9038
Spanish National Research Council
Morbiato, Elisa
University of Ferrara
Pilastro, Andrea
University of Padua
Dietary stress increases the total opportunity for sexual selection and
modifies selection on condition-dependent traits
Dryad
dataset
2020
2020-12-02T00:00:00Z
2019-12-15T00:00:00Z
en
https://doi.org/10.1111/ele.13443
30769 bytes
3
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Although it is often expected that adverse environmental conditions
depress the expression of condition-dependent sexually-selected traits,
the full consequences of environmental change for the action of sexual
selection, in terms of the opportunity for total sexual selection and
patterns of phenotypic selection, are unknown. Here we show that dietary
stress in guppies, Poecilia reticulata, reduces the expression of several
sexually-selected traits and increases the opportunity for total sexual
selection (standardized variance in reproductive success) in males.
Furthermore, our results show that dietary stress modulates the relative
importance of precopulatory (mating success) and postcopulatory (relative
fertilization success) sexual selection, and that the form of multivariate
sexual selection (linear vs. nonlinear) depends on dietary regime.
Overall, our results are consistent with a pattern of heightened
directional selection on condition-dependent sexually-selected traits
under environmental stress, and underscore the importance of sexual
selection in shaping adaptation in a changing world.