D. Wysocki, M. Cholewa, A. Gwiazdowska, K. Halupka, R. Rutkowski, M. Szenejko
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Low level of extra-pair paternity in an urban population of blackbirds
Abstract We studied extra-pair paternity in a socially monogamous bird, the European Blackbird (Turdus merula). The research was conducted in an urban park in Poland. We obtained genetic samples from 36 broods (123 nestlings) of 21 unique pairs. The proportion of broods with some extra-pair nestlings was 17.1% (6 broods), and overall, 13.1% (16 nestlings) of all nestlings were sired by extra-pair males. In one brood (2.8% of all the investigated broods), we found one egg laid by a female which did not have her own territory in the study area (brood parasitism). These figures are relatively low compared to other closely related passerines. We suggest that mate guarding in the studied population may effectively prevent females from engaging in extra-pair activity, and in the case of females, divorce and serial polygamy are better strategies for enhancing the genetic quality and genetic diversity of their offspring than infidelity.
期刊介绍:
The European Zoological Journal (previously Italian Journal of Zoology) is an open access journal devoted to the study of all aspects of basic, comparative and applied protozoan and animal biology at molecular, cellular, tissue, organ, organismal, population, and community-ecosystem level. Papers covering multiple levels of organization and integrative approaches to study animal form, function, development, ecology, evolution and systematics are welcome. First established in 1930 under the name of Il Bollettino di Zoologia, the journal now has an international focus, reflected through its global editorial board, and wide author and readership.