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Song similarity predicts hybridization in flycatchers.
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Department of Evolution, Genomics and Systematics, Evolutionary Biology.ORCID iD: 0000-0002-1178-4053
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Department of Evolution, Genomics and Systematics, Evolutionary Biology. Evolutionsbiologi. (Molecular Evolution)
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2006 (English)In: J Evol Biol, ISSN 1010-061X, Vol. 19, no 4, 1202-9 p.Article in journal (Refereed) Published
Abstract [en]

Given that population divergence in sexual signals is an important prerequisite for reproductive isolation, a key prediction is that cases of signal convergence should lead to hybridization. However, empirical studies that quantitatively demonstrate links between phenotypic characters of individuals and their likelihood to hybridize are rare. Here we show that song convergence between sympatric pied (Ficedula hypoleuca) and collared flycatchers (F. albicollis) influence social and sexual interactions between the two species. In sympatry, the majority of male pied flycatchers (65%) include various parts of collared flycatcher song in their song repertoire (but not vice versa). Playback experiments on male interactions demonstrate that male collared flycatchers respond similarly to this 'mixed' song as to conspecific song. Long-term data on pairing patterns show that males singing a converged song attract females of the other species: female collared flycatchers only pair with male pied flycatchers if the males sing the mixed song type. From the perspective of a male pied flycatcher, singing a mixed song type is associated with 30% likelihood of hybridization. This result, combined with our estimates of the frequency of mixed singers, accurately predicts the observed occurrence of hybridization among male pied flycatchers in our study populations (20.45% of 484 pairs; predicted 19.5%). Our results support the suggestion that song functions as the most important prezygotic isolation mechanism in many birds.

Place, publisher, year, edition, pages
2006. Vol. 19, no 4, 1202-9 p.
Keyword [en]
Animal Communication, Animals, Birds/genetics/*physiology, Hybridization; Genetic, Species Specificity
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:uu:diva-24678PubMedID: 16780521OAI: oai:DiVA.org:uu-24678DiVA: diva2:52452
Available from: 2007-02-06 Created: 2007-02-06 Last updated: 2015-11-24

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Qvarnström, A

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