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Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus

Extra-pair copulation can increase genetic diversity and offspring fitness. However, it may also increase intra-nest variability in avian hosts of brood parasites, which can decrease the discrimination ability of host parents towards the parasite. In New Caledonia, the Fan-tailed Gerygone (Gerygone...

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Autores principales: Bojarska, Katarzyna, Kuehn, Ralph, Gazda, Małgorzata A., Sato, Nozomu J., Okahisa, Yuji, Tanaka, Keita D., Attisano, Alfredo, Gula, Roman, Ueda, Keisuke, Theuerkauf, Jörn
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5843341/
https://www.ncbi.nlm.nih.gov/pubmed/29518150
http://dx.doi.org/10.1371/journal.pone.0194059
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author Bojarska, Katarzyna
Kuehn, Ralph
Gazda, Małgorzata A.
Sato, Nozomu J.
Okahisa, Yuji
Tanaka, Keita D.
Attisano, Alfredo
Gula, Roman
Ueda, Keisuke
Theuerkauf, Jörn
author_facet Bojarska, Katarzyna
Kuehn, Ralph
Gazda, Małgorzata A.
Sato, Nozomu J.
Okahisa, Yuji
Tanaka, Keita D.
Attisano, Alfredo
Gula, Roman
Ueda, Keisuke
Theuerkauf, Jörn
author_sort Bojarska, Katarzyna
collection PubMed
description Extra-pair copulation can increase genetic diversity and offspring fitness. However, it may also increase intra-nest variability in avian hosts of brood parasites, which can decrease the discrimination ability of host parents towards the parasite. In New Caledonia, the Fan-tailed Gerygone (Gerygone flavolateralis), which is parasitized by the Shining Bronze-cuckoo (Chalcites lucidus), has two nestling morphs, dark and bright, that can occur in monomorphic and polymorphic broods. Gerygone parents recognize and eject parasite nestlings from their nest, but the presence of polymorphic broods may increase the chances of recognition errors. Using 17 microsatellite markers, we investigated the mating system of the Fan-tailed Gerygone to understand the mechanisms underlying nestling polymorphism. We hypothesised that extra-pair copulations would lead to a higher proportion of polymorphic broods caused by higher genetic variability, thus creating a trade-off between genetic benefits and host defence reliability. Extra-pair paternity occurred in 6 of 36 broods, which resulted in 6 of 69 offspring sired by extra-pair males. Broods with and without mixed paternity were comparably often parasitized. Extra-pair paternity did not influence the proportions of bright, dark and polymorphic broods. Compared to bright siblings in polymorphic broods, dark nestlings tended to have lower heterozygosity, particularly in loci associated with skin coloration. The results also suggested that there is no obstacle for genetic exchange between individuals from forest and savannah, possibly due to dispersal of offspring. We conclude that the Fan-tailed Gerygone is a socially monogamous species with a low rate of extra-pair paternity compared to closely related species. Extra-pair paternity increased offspring genetic variability without measurable associated costs by brood parasitism. The results highlight the importance of studying host mating systems to assess the trade-offs between host defence and offspring fitness in co-evolutionary arms races.
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spelling pubmed-58433412018-03-23 Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus Bojarska, Katarzyna Kuehn, Ralph Gazda, Małgorzata A. Sato, Nozomu J. Okahisa, Yuji Tanaka, Keita D. Attisano, Alfredo Gula, Roman Ueda, Keisuke Theuerkauf, Jörn PLoS One Research Article Extra-pair copulation can increase genetic diversity and offspring fitness. However, it may also increase intra-nest variability in avian hosts of brood parasites, which can decrease the discrimination ability of host parents towards the parasite. In New Caledonia, the Fan-tailed Gerygone (Gerygone flavolateralis), which is parasitized by the Shining Bronze-cuckoo (Chalcites lucidus), has two nestling morphs, dark and bright, that can occur in monomorphic and polymorphic broods. Gerygone parents recognize and eject parasite nestlings from their nest, but the presence of polymorphic broods may increase the chances of recognition errors. Using 17 microsatellite markers, we investigated the mating system of the Fan-tailed Gerygone to understand the mechanisms underlying nestling polymorphism. We hypothesised that extra-pair copulations would lead to a higher proportion of polymorphic broods caused by higher genetic variability, thus creating a trade-off between genetic benefits and host defence reliability. Extra-pair paternity occurred in 6 of 36 broods, which resulted in 6 of 69 offspring sired by extra-pair males. Broods with and without mixed paternity were comparably often parasitized. Extra-pair paternity did not influence the proportions of bright, dark and polymorphic broods. Compared to bright siblings in polymorphic broods, dark nestlings tended to have lower heterozygosity, particularly in loci associated with skin coloration. The results also suggested that there is no obstacle for genetic exchange between individuals from forest and savannah, possibly due to dispersal of offspring. We conclude that the Fan-tailed Gerygone is a socially monogamous species with a low rate of extra-pair paternity compared to closely related species. Extra-pair paternity increased offspring genetic variability without measurable associated costs by brood parasitism. The results highlight the importance of studying host mating systems to assess the trade-offs between host defence and offspring fitness in co-evolutionary arms races. Public Library of Science 2018-03-08 /pmc/articles/PMC5843341/ /pubmed/29518150 http://dx.doi.org/10.1371/journal.pone.0194059 Text en © 2018 Bojarska et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Bojarska, Katarzyna
Kuehn, Ralph
Gazda, Małgorzata A.
Sato, Nozomu J.
Okahisa, Yuji
Tanaka, Keita D.
Attisano, Alfredo
Gula, Roman
Ueda, Keisuke
Theuerkauf, Jörn
Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus
title Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus
title_full Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus
title_fullStr Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus
title_full_unstemmed Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus
title_short Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus
title_sort mating system and extra-pair paternity in the fan-tailed gerygone gerygone flavolateralis in relation to parasitism by the shining bronze-cuckoo chalcites lucidus
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5843341/
https://www.ncbi.nlm.nih.gov/pubmed/29518150
http://dx.doi.org/10.1371/journal.pone.0194059
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