Male song structure predicts offspring recruitment to the breeding population in a migratory bird

Author:

DiSciullo Rachael A1ORCID,Forsman Anna M23ORCID,Fitak Robert R2ORCID,Hunt John4ORCID,Nietlisbach Pirmin1ORCID,Thompson Charles F1ORCID,Sakaluk Scott K1ORCID

Affiliation:

1. Behavior, Ecology, Evolution, and Conservation Section, School of Biological Sciences, Illinois State University , Normal, IL , USA

2. Department of Biology, University of Central Florida , Orlando, FL , USA

3. Current location: Department of Biology, Colby College , Waterville, ME , USA

4. School of Science, Western Sydney University , Penrith , Australia

Abstract

Abstract Bird song is a classic example of a sexually selected trait, but much of the work relating individual song components to fitness has not accounted for song typically being composed of multiple, often-correlated components, necessitating a multivariate approach. We explored the role of sexual selection in shaping the complex male song of house wrens (Troglodytes aedon) by simultaneously relating its multiple components to fitness using multivariate selection analysis, which is widely used in insect and anuran studies but not in birds. The analysis revealed significant variation in the form and strength of selection acting on song across different selection episodes, from nest-site defense to recruitment of offspring to the breeding population. Males that sang more song typically employed in close communication sired more offspring that were subsequently recruited to the breeding population than those that sang more far-communication song. However, this relationship was not consistent across earlier selection episodes, as evidenced by non-linear selection acting on these song components in other contexts. Collectively, our results present a complex picture of multivariate selection on male song structure that would not be evident using univariate approaches and suggest possible trade-offs within and among song components at different points of the breeding season.

Funder

National Institutes of Health

Illinois State University Foundation Bird Study and Student Fellowship Fund

ARC Discovery Project

Publisher

Oxford University Press (OUP)

Reference104 articles.

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5. A tale of two matrices: Multivariate approaches in evolutionary biology;Blows,2007

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