Mar 30, 2020

Analysis of female song provides insight into the evolution of dimorphism in a widely studied songbird

BioRxiv : the Preprint Server for Biology
Matthew R WilkinsR. J. Safran


Understanding the patterns and processes related to sexual dimorphism in diverse animal taxa is a foundational research topic in ecology and evolution. Within the realm of animal communication, studies have traditionally focused on male signals, assuming that female choice and male-male competition have promoted dimorphism via elaboration of male traits, but selection on females also has the potential to create sex differences. Here, we describe female song in barn swallows for the first time, report rates of female song production, and couple song data with plumage data to explore the relative degree to which dimorphism in signaling traits is consistent with contemporary selection on males versus females. During previous intensive study of male song over two years, we recorded songs for 15 females, with matched phenotypic and fitness data. We randomly selected 15 samples from our larger male dataset to test whether sexual dimorphism in song and plumage is more strongly associated with fledgling success for females or genetic paternity for males. Analyses included 35 potential sexual signals including 22 song parameters and 13 plumage traits. Outcomes indicate that: female songs are used in multiple contexts, restricted primari...Continue Reading

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Mentioned in this Paper

Gene Polymorphism
DNA Repair
Indonesia Zebrafish
Nucleic Acid Sequencing
DNA Library

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