Save

Complex spatiotemporal variation in processes shaping song variation

In: Behaviour
Authors:
Claire M. Curry University Libraries, University of Oklahoma, Norman, OK 73019, USA
Oklahoma Biological Survey, Ecology and Evolutionary Biology Program, and Department of Biology, University of Oklahoma, Norman, OK 73019, USA

Search for other papers by Claire M. Curry in
Current site
Google Scholar
PubMed
Close
and
Michael A. Patten Oklahoma Biological Survey, Ecology and Evolutionary Biology Program, and Department of Biology, University of Oklahoma, Norman, OK 73019, USA

Search for other papers by Michael A. Patten in
Current site
Google Scholar
PubMed
Close
Download Citation Get Permissions

Access options

Get access to the full article by using one of the access options below.

Institutional Login

Log in with Open Athens, Shibboleth, or your institutional credentials

Login via Institution

Purchase

Buy instant access (PDF download and unlimited online access):

$34.95

Abstract

Understanding factors that contribute to song divergence bolsters our understanding of signal evolution and reproductive isolation. Hybrid zones often occur across environmental gradients; as such, they are excellent places to examine how signals diverge and how differentiation is maintained. We studied song variation across two hybrid zones, one old and one recent, of Tufted Titmouse (Baeolophus bicolor) and Black-crested Titmouse (B. atricristatus), across an environmental gradient where the two titmouse populations meet. In the recent zone, noise and vegetation structure were correlated with several song characteristics, but in the older zone, these features did not correlate despite similar gradients in song features. Our data, combined with previous studies, suggest that despite overall similarities in characteristics, songs in the older zone may be more shaped by sexual selection, whereas songs in the young zone are shaped by environment. Thus, even within the same species, processes shaping signal structure can vary spatially and temporally.

Content Metrics

All Time Past Year Past 30 Days
Abstract Views 390 83 14
Full Text Views 57 7 1
PDF Views & Downloads 60 10 3