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Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location

Centres of avian colonies are usually associated with reduced predation risk and, thus, attract individuals of high quality, while poor-quality individuals are relegated to peripheral zones. Assuming that the incidence of extra-pair paternity (EPP) is dependent on individual quality, we could expect...

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Autores principales: Minias, Piotr, Wojczulanis-Jakubas, Katarzyna, Rutkowski, Robert, Kaczmarek, Krzysztof, Janiszewski, Tomasz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4748001/
https://www.ncbi.nlm.nih.gov/pubmed/26900213
http://dx.doi.org/10.1007/s00265-015-2056-0
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author Minias, Piotr
Wojczulanis-Jakubas, Katarzyna
Rutkowski, Robert
Kaczmarek, Krzysztof
Janiszewski, Tomasz
author_facet Minias, Piotr
Wojczulanis-Jakubas, Katarzyna
Rutkowski, Robert
Kaczmarek, Krzysztof
Janiszewski, Tomasz
author_sort Minias, Piotr
collection PubMed
description Centres of avian colonies are usually associated with reduced predation risk and, thus, attract individuals of high quality, while poor-quality individuals are relegated to peripheral zones. Assuming that the incidence of extra-pair paternity (EPP) is dependent on individual quality, we could expect lower incidence of extra-pair offspring in the central parts of colonies. On the other hand, central pairs often nest in higher densities, which might increase EPP rate. To test these hypotheses, we sampled 124 great cormorant Phalacarocorax carbo sinensis chicks from 30 broods from different zones of a colony and genotyped them at seven highly polymorphic microsatellite loci. Sibship reconstruction confirmed the presence of at least one extra-pair chick in 30.0 % of broods. We found that EPP varied significantly between the zones of the colony, with higher incidence of extra-pair broods in the peripheral zone (53.3 vs. 6.7 % of broods). Centre-edge difference in EPP was consistent with the expected distribution of pair quality and suggested that poor-quality peripheral females were more likely to solicit extra-pair interactions, possibly to gain ‘good genes’ for their offspring. By contrast, we found no evidence for density dependence in EPP rate, indicating that likelihood of raising extra-pair offspring was not constrained by limited availability of local males. The results indicate that spatial randomization of sampling within avian colonies is critical to obtain robust estimations of EPP for non-solitary species. To our knowledge, this study provides the first evidence for the centre-edge difference in EPP within a breeding colony of birds.
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spelling pubmed-47480012016-02-19 Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location Minias, Piotr Wojczulanis-Jakubas, Katarzyna Rutkowski, Robert Kaczmarek, Krzysztof Janiszewski, Tomasz Behav Ecol Sociobiol Original Article Centres of avian colonies are usually associated with reduced predation risk and, thus, attract individuals of high quality, while poor-quality individuals are relegated to peripheral zones. Assuming that the incidence of extra-pair paternity (EPP) is dependent on individual quality, we could expect lower incidence of extra-pair offspring in the central parts of colonies. On the other hand, central pairs often nest in higher densities, which might increase EPP rate. To test these hypotheses, we sampled 124 great cormorant Phalacarocorax carbo sinensis chicks from 30 broods from different zones of a colony and genotyped them at seven highly polymorphic microsatellite loci. Sibship reconstruction confirmed the presence of at least one extra-pair chick in 30.0 % of broods. We found that EPP varied significantly between the zones of the colony, with higher incidence of extra-pair broods in the peripheral zone (53.3 vs. 6.7 % of broods). Centre-edge difference in EPP was consistent with the expected distribution of pair quality and suggested that poor-quality peripheral females were more likely to solicit extra-pair interactions, possibly to gain ‘good genes’ for their offspring. By contrast, we found no evidence for density dependence in EPP rate, indicating that likelihood of raising extra-pair offspring was not constrained by limited availability of local males. The results indicate that spatial randomization of sampling within avian colonies is critical to obtain robust estimations of EPP for non-solitary species. To our knowledge, this study provides the first evidence for the centre-edge difference in EPP within a breeding colony of birds. Springer Berlin Heidelberg 2016-01-14 2016 /pmc/articles/PMC4748001/ /pubmed/26900213 http://dx.doi.org/10.1007/s00265-015-2056-0 Text en © The Author(s) 2016 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Original Article
Minias, Piotr
Wojczulanis-Jakubas, Katarzyna
Rutkowski, Robert
Kaczmarek, Krzysztof
Janiszewski, Tomasz
Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location
title Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location
title_full Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location
title_fullStr Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location
title_full_unstemmed Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location
title_short Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location
title_sort spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4748001/
https://www.ncbi.nlm.nih.gov/pubmed/26900213
http://dx.doi.org/10.1007/s00265-015-2056-0
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