Molecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite

Generalist parasites exploit multiple host species at the population level, but the individual parasite's strategy may be either itself a generalist or a specialist pattern of host species use. Here, we studied the relationship between host availability and host use in the individual parasitism...

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Detalles Bibliográficos
Autores principales:	de la Colina, María Alicia, Reboreda, Juan Carlos, Mahler, Bettina
Publicado:	2016
Materias:	Host preference laying patterns microsatellites Molothrus bonariensis mtDNA nest-use strategies
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20457758_v6_n14_p4684_delaColina http://hdl.handle.net/20.500.12110/paper_20457758_v6_n14_p4684_delaColina
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_20457758_v6_n14_p4684_delaColina
record_format	dspace
spelling	paper:paper_20457758_v6_n14_p4684_delaColina2023-06-08T16:33:40Z Molecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite de la Colina, María Alicia Reboreda, Juan Carlos Mahler, Bettina Host preference laying patterns microsatellites Molothrus bonariensis mtDNA nest-use strategies Generalist parasites exploit multiple host species at the population level, but the individual parasite's strategy may be either itself a generalist or a specialist pattern of host species use. Here, we studied the relationship between host availability and host use in the individual parasitism patterns of the Shiny Cowbird Molothrus bonariensis, a generalist avian obligate brood parasite that parasitizes an extreme range of hosts. Using five microsatellite markers and an 1120-bp fragment of the mtDNA control region, we reconstructed full-sibling groups from 359 cowbird eggs and chicks found in nests of the two most frequent hosts in our study area, the Chalk-browed Mockingbird Mimus saturninus and the House Wren Troglodytes aedon. We were able to infer the laying behavior of 17 different females a posteriori and found that they were mostly faithful to a particular laying area and host species along the entire reproductive season and did not avoid using previously parasitized nests (multiple parasitism) even when other nests were available for parasitism. Moreover, we found females using the same host nest more than once (repeated parasitism), which had not been previously reported for this species. We also found few females parasitizing more than one host species. The use of an alternative host was not related to the main hosts' nest availability. Overall, female shiny cowbirds use a spatially structured and host species specific approach for parasitism, but they do so nonexclusively, resulting in both detectable levels of multiple parasitism and generalism at the level of individual parasites. © 2016 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. Fil:de la Colina, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Reboreda, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mahler, B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20457758_v6_n14_p4684_delaColina http://hdl.handle.net/20.500.12110/paper_20457758_v6_n14_p4684_delaColina
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Host preference laying patterns microsatellites Molothrus bonariensis mtDNA nest-use strategies
spellingShingle	Host preference laying patterns microsatellites Molothrus bonariensis mtDNA nest-use strategies de la Colina, María Alicia Reboreda, Juan Carlos Mahler, Bettina Molecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite
topic_facet	Host preference laying patterns microsatellites Molothrus bonariensis mtDNA nest-use strategies
description	Generalist parasites exploit multiple host species at the population level, but the individual parasite's strategy may be either itself a generalist or a specialist pattern of host species use. Here, we studied the relationship between host availability and host use in the individual parasitism patterns of the Shiny Cowbird Molothrus bonariensis, a generalist avian obligate brood parasite that parasitizes an extreme range of hosts. Using five microsatellite markers and an 1120-bp fragment of the mtDNA control region, we reconstructed full-sibling groups from 359 cowbird eggs and chicks found in nests of the two most frequent hosts in our study area, the Chalk-browed Mockingbird Mimus saturninus and the House Wren Troglodytes aedon. We were able to infer the laying behavior of 17 different females a posteriori and found that they were mostly faithful to a particular laying area and host species along the entire reproductive season and did not avoid using previously parasitized nests (multiple parasitism) even when other nests were available for parasitism. Moreover, we found females using the same host nest more than once (repeated parasitism), which had not been previously reported for this species. We also found few females parasitizing more than one host species. The use of an alternative host was not related to the main hosts' nest availability. Overall, female shiny cowbirds use a spatially structured and host species specific approach for parasitism, but they do so nonexclusively, resulting in both detectable levels of multiple parasitism and generalism at the level of individual parasites. © 2016 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.
author	de la Colina, María Alicia Reboreda, Juan Carlos Mahler, Bettina
author_facet	de la Colina, María Alicia Reboreda, Juan Carlos Mahler, Bettina
author_sort	de la Colina, María Alicia
title	Molecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite
title_short	Molecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite
title_full	Molecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite
title_fullStr	Molecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite
title_full_unstemmed	Molecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite
title_sort	molecular tracking of individual host use in the shiny cowbird – a generalist brood parasite
publishDate	2016
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20457758_v6_n14_p4684_delaColina http://hdl.handle.net/20.500.12110/paper_20457758_v6_n14_p4684_delaColina
work_keys_str_mv	AT delacolinamariaalicia moleculartrackingofindividualhostuseintheshinycowbirdageneralistbroodparasite AT reboredajuancarlos moleculartrackingofindividualhostuseintheshinycowbirdageneralistbroodparasite AT mahlerbettina moleculartrackingofindividualhostuseintheshinycowbirdageneralistbroodparasite
_version_	1768545116689006592

Molecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite

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