Higher frequency of extra-pair offspring in urban than forest broods of great tits (Parus major)

Ivett Pipoly, Krisztián Szabó, V. Bókony, Bálint Preiszner, Gábor Seress, Erno Vincze, Julia Schroeder, A. Likér

Research output: Contribution to journalArticle

Abstract

Urbanization increasingly changes the ecological conditions for wild animal populations, influencing their demography, reproduction, and behavior. While studies on the ecological consequences of urbanization frequently document a reduced number and poorer body condition of offspring in urban than in non-urban bird populations, consequences for other components of reproduction are rarely investigated. Mating with partners outside the social pair-bond is widespread in birds, and although theory predicts that the occurrence of extra-pair fertilizations (EPF) may be sensitive to the altered ecological conditions of cities, the effect of urbanization on EPF is poorly known. Here we used data from two urban and two forest populations collected over 3 years to test whether the frequency of extra-pair offspring (EPO) in great tit broods differed between the habitats. We found that significantly more broods contained EPO in urban habitats (48.9%) than in forests (24.4%). In broods with EPO, the number and proportion of EPO was similar in urban and forest broods. These results suggest that females that live in urban habitats are more likely to engage in EPF than those living in forests. Urban environments may either provide more spatiotemporal opportunities to EPF because of higher breeding density, and/or enhance motivation for EPF to increase fertility in polluted environments. In addition, females with higher propensity to engage in EPF may more likely settle in urban habitats.

Original languageEnglish
Article number229
JournalFrontiers in Ecology and Evolution
Volume7
Issue numberJUN
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Parus major
fertilization (reproduction)
urbanization
pair bond
bird
habitats
body condition
demography
fertility
birds
breeding
wild animals
environmental impact
habitat
urban habitat
testing

Keywords

  • Cuckoldry
  • Extra-pair paternity
  • Promiscuity
  • Reproductive behavior
  • Urbanization

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Higher frequency of extra-pair offspring in urban than forest broods of great tits (Parus major). / Pipoly, Ivett; Szabó, Krisztián; Bókony, V.; Preiszner, Bálint; Seress, Gábor; Vincze, Erno; Schroeder, Julia; Likér, A.

In: Frontiers in Ecology and Evolution, Vol. 7, No. JUN, 229, 01.01.2019.

Research output: Contribution to journalArticle

Pipoly, Ivett ; Szabó, Krisztián ; Bókony, V. ; Preiszner, Bálint ; Seress, Gábor ; Vincze, Erno ; Schroeder, Julia ; Likér, A. / Higher frequency of extra-pair offspring in urban than forest broods of great tits (Parus major). In: Frontiers in Ecology and Evolution. 2019 ; Vol. 7, No. JUN.
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