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Genetic evidence of extra-pair paternity and intraspecific brood parasitism in the monk parakeet

INTRODUCTION: The monk parakeet (Myiopsitta monachus) is a widespread invasive species native to southern South America that has become established in many regions of the world. Monk parakeets breed in a large, fully enclosed structure built from twigs, which consist of one to many individual broodi...

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Autores principales: Martínez, Juan José, de Aranzamendi, María Carla, Masello, Juan F, Bucher, Enrique H
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3839639/
https://www.ncbi.nlm.nih.gov/pubmed/24209709
http://dx.doi.org/10.1186/1742-9994-10-68
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author Martínez, Juan José
de Aranzamendi, María Carla
Masello, Juan F
Bucher, Enrique H
author_facet Martínez, Juan José
de Aranzamendi, María Carla
Masello, Juan F
Bucher, Enrique H
author_sort Martínez, Juan José
collection PubMed
description INTRODUCTION: The monk parakeet (Myiopsitta monachus) is a widespread invasive species native to southern South America that has become established in many regions of the world. Monk parakeets breed in a large, fully enclosed structure built from twigs, which consist of one to many individual brooding chambers. The species has been considered to be socially and genetically monogamous. However, genetic relatedness of adults to juveniles in the native area was found to be lower than expected for monogamy. To assess the significance of this discrepancy, we examined individual and population genetic patterns of microsatellite loci at two sites in Córdoba province, Argentina. RESULTS: We sampled 154 nestlings and 42 adults in Córdoba, Argentina. Mean value of pairwise relatedness of nestlings within chambers was about 0.40. Contrarily, relatedness of nestlings between chambers was close to zero. We found a considerable degree of variation in nestling pairwise relatedness and parentage within chambers, including chambers with combinations of unrelated, half-sib, and full-sib nestlings. The proportion of sibling relatedness indicated monogamy in 47% and extra pair-paternity in 40% of the chambers. We also found intra-brood parasitism in 3% of the chambers. CONCLUSIONS: Our results indicate that the monk parakeet is sexually polygamous in its native range in Argentina, which is consistent with the observed mean value of relatedness of adults to juveniles of about 0.4. We also confirm the existence of intra-brood parasitism. High density of monk parakeets may favor occurrence of extra-pair paternity and intra-brood parasitism in the native sites.
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spelling pubmed-38396392013-11-26 Genetic evidence of extra-pair paternity and intraspecific brood parasitism in the monk parakeet Martínez, Juan José de Aranzamendi, María Carla Masello, Juan F Bucher, Enrique H Front Zool Research INTRODUCTION: The monk parakeet (Myiopsitta monachus) is a widespread invasive species native to southern South America that has become established in many regions of the world. Monk parakeets breed in a large, fully enclosed structure built from twigs, which consist of one to many individual brooding chambers. The species has been considered to be socially and genetically monogamous. However, genetic relatedness of adults to juveniles in the native area was found to be lower than expected for monogamy. To assess the significance of this discrepancy, we examined individual and population genetic patterns of microsatellite loci at two sites in Córdoba province, Argentina. RESULTS: We sampled 154 nestlings and 42 adults in Córdoba, Argentina. Mean value of pairwise relatedness of nestlings within chambers was about 0.40. Contrarily, relatedness of nestlings between chambers was close to zero. We found a considerable degree of variation in nestling pairwise relatedness and parentage within chambers, including chambers with combinations of unrelated, half-sib, and full-sib nestlings. The proportion of sibling relatedness indicated monogamy in 47% and extra pair-paternity in 40% of the chambers. We also found intra-brood parasitism in 3% of the chambers. CONCLUSIONS: Our results indicate that the monk parakeet is sexually polygamous in its native range in Argentina, which is consistent with the observed mean value of relatedness of adults to juveniles of about 0.4. We also confirm the existence of intra-brood parasitism. High density of monk parakeets may favor occurrence of extra-pair paternity and intra-brood parasitism in the native sites. BioMed Central 2013-11-09 /pmc/articles/PMC3839639/ /pubmed/24209709 http://dx.doi.org/10.1186/1742-9994-10-68 Text en Copyright © 2013 Martínez et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Martínez, Juan José
de Aranzamendi, María Carla
Masello, Juan F
Bucher, Enrique H
Genetic evidence of extra-pair paternity and intraspecific brood parasitism in the monk parakeet
title Genetic evidence of extra-pair paternity and intraspecific brood parasitism in the monk parakeet
title_full Genetic evidence of extra-pair paternity and intraspecific brood parasitism in the monk parakeet
title_fullStr Genetic evidence of extra-pair paternity and intraspecific brood parasitism in the monk parakeet
title_full_unstemmed Genetic evidence of extra-pair paternity and intraspecific brood parasitism in the monk parakeet
title_short Genetic evidence of extra-pair paternity and intraspecific brood parasitism in the monk parakeet
title_sort genetic evidence of extra-pair paternity and intraspecific brood parasitism in the monk parakeet
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3839639/
https://www.ncbi.nlm.nih.gov/pubmed/24209709
http://dx.doi.org/10.1186/1742-9994-10-68
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