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- W3158525061 abstract "Signal divergence is thought to reduce the costs of co-occurrence for closely related species and may thereby be important in the generation and maintenance of new biodiversity. In birds, closely related, sympatric species are more divergent in their colour patterns than those that live apart, but the selective pressures driving sympatric divergence in colour pattern are not well-understood. Here, we conducted field experiments on naïve birds using spectrometer-matched, painted, 3D-printed models to test whether selection against heterospecific aggression might drive colour pattern divergence in the genus Poecile. We found that territorial male black-capped chickadees (P. atricapillus) are equally likely to attack sympatric and allopatric congeners, and wintering flocks are equally likely to visit feeders occupied by sympatric and allopatric congeners, despite sympatric congeners being more divergent in colour pattern. These results suggest that either the concerted evolution of additional traits (e.g. discrimination), or interactions in sympatry that promote learning, is required if colour pattern divergence among sympatric species is to reduce heterospecific aggression. Alternatively, colour pattern divergence among sympatric species may be caused by other selective pressures, such as selection against hybridization or habitat partitioning and secondary signal adaptation." @default.
- W3158525061 created "2021-05-10" @default.
- W3158525061 creator A5032372867 @default.
- W3158525061 creator A5037459130 @default.
- W3158525061 date "2021-06-29" @default.
- W3158525061 modified "2023-10-15" @default.
- W3158525061 title "Experimental tests of selection against heterospecific aggression as a driver of avian colour pattern divergence" @default.
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- W3158525061 doi "https://doi.org/10.1111/jeb.13798" @default.
- W3158525061 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33949033" @default.
- W3158525061 hasPublicationYear "2021" @default.
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