10.5061/DRYAD.5865F
Safran, Rebecca
University of Colorado Boulder
Vortman, Yoni
Tel Aviv University
Jenkins, Brittany R.
University of Colorado Boulder
Hubbard, Joanna K.
University of Nebraska - Lincoln
University of Colorado Boulder
Wilkins, Matthew R.
University of Nebraska - Lincoln
University of Colorado Boulder
Bradley, Rachel J.
University of Colorado Boulder
Lotem, Arnon
Tel Aviv University
Data from: The maintenance of phenotypic divergence through sexual
selection: an experimental study in barn swallows Hirundo rustica
Dryad
dataset
2016
Selection - Sexual
Hirundo rustica
2016-07-14T13:32:59Z
2016-07-14T13:32:59Z
en
https://doi.org/10.1111/evo.13014
https://doi.org/10.1086/671908
45489 bytes
8
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Previous studies have shown that sexual signals can rapidly diverge among
closely related species. However, we lack experimental studies to
demonstrate that differences in trait-associated reproductive performance
maintain sexual trait differences between closely related populations, in
support for a role of sexual selection in speciation. Populations of
Northern Hemisphere distributed barn swallows Hirundo rustica are closely
related, yet differ in two plumage-based traits: ventral color and length
of the outermost tail feathers (streamers). Here we provide experimental
evidence that manipulations of these traits result in different
reproductive consequences in two subspecies of barn swallow: (H. r.
erythrogaster in North America and H. r. transitiva in the East
Mediterranean). Experimental results in Colorado, USA, demonstrate that
males with (1) darkened ventral coloration and (2) shortened streamers
gained paternity between two successive reproductive bouts. In contrast,
exaggeration of both traits improved reproductive performance within H. r.
transitiva in Israel: males with a combination treatment of darkened
ventral coloration and elongated streamers gained paternity between two
successive reproductive bouts. Collectively, these experimental results
fill an important gap in our understanding for how divergent sexual
selection maintains phenotype differentiation in closely related
populations, an important aspect of the speciation process.
CO-IL manipulation data.xlsx This file contains the paternity outcomes
associated with the experimental manipulation of phenotype in two
different study locations: Israel and Colorado, USA. These data were
thoroughly checked and uploaded on 24 December 2021 in association with a
response to a technical comment written by J. Lifjeld. Colorado 2009
with residuals.xlsx This file contains pre- and post-phenotype
manipulation outcomes in paternity (measured in three ways) for males
randomly assigned one of six phenotype treatments (described in the
methods). Please note that the same pre- and post- phenotype manipulation
outcomes for paternity from Israel are associated with Vortman et al.
2013 https://doi.org/10.1086/671908 Please refer to the README file with
further details about both data sets.
Details about data collection and analysis are contained in the methods
section of the manuscript. In the recently uploaded file containing
Colorado data [Colorado 2009 with residuals.xlsx] we place two additional
comments containing data from residuals taken from a regression of
paternity changes over initial paternity (for both proportion of own young
within a brood and for initial number of extra-pair young).
United States
Israel