Host switching in cowbird brood parasites: How often does it occur?

Avian obligate brood parasites lay their eggs in nests of host species, which provide all parental care. Brood parasites may be host specialists, if they use one or a few host species, or host generalists, if they parasitize many hosts. Within the latter, strains of host-specific females might coexi...

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Autores principales:	Domínguez, M., de la Colina, M.A., Di Giacomo, A.G., Reboreda, J.C., Mahler, B.
Formato:	JOUR
Materias:	Genetic differentiation Host switches Migration rate Screaming cowbird Shiny cowbird brood parasitism coexistence fledging generalist genetic differentiation host range host selection host specificity migration obligate behavior parental care passerine Aves Molothrus Molothrus bonariensis Molothrus rufoaxillaris genetic marker animal animal dispersal competitive behavior egg laying gene flow genetic variation genetics haplotype human molecular genetics nesting Passeriformes physiology population migration species difference Animal Distribution Animal Migration Animals Competitive Behavior Gene Flow Genetic Markers Genetic Variation Haplotypes Humans Molecular Sequence Data Nesting Behavior Oviposition Species Specificity
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_1010061X_v28_n6_p1290_Dominguez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_1010061X_v28_n6_p1290_Dominguez
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spelling	todo:paper_1010061X_v28_n6_p1290_Dominguez2023-10-03T15:55:55Z Host switching in cowbird brood parasites: How often does it occur? Domínguez, M. de la Colina, M.A. Di Giacomo, A.G. Reboreda, J.C. Mahler, B. Genetic differentiation Host switches Migration rate Screaming cowbird Shiny cowbird brood parasitism coexistence fledging generalist genetic differentiation host range host selection host specificity migration obligate behavior parental care passerine Aves Molothrus Molothrus bonariensis Molothrus rufoaxillaris genetic marker animal animal dispersal competitive behavior egg laying gene flow genetic marker genetic variation genetics haplotype human molecular genetics nesting Passeriformes physiology population migration species difference Animal Distribution Animal Migration Animals Competitive Behavior Gene Flow Genetic Markers Genetic Variation Haplotypes Humans Molecular Sequence Data Nesting Behavior Oviposition Passeriformes Species Specificity Avian obligate brood parasites lay their eggs in nests of host species, which provide all parental care. Brood parasites may be host specialists, if they use one or a few host species, or host generalists, if they parasitize many hosts. Within the latter, strains of host-specific females might coexist. Although females preferentially parasitize one host, they may occasionally successfully parasitize the nest of another species. These host switching events allow the colonization of new hosts and the expansion of brood parasites into new areas. In this study, we analyse host switching in two parasitic cowbirds, the specialist screaming cowbird (Molothrus rufoaxillaris) and the generalist shiny cowbird (M. bonariensis), and compare the frequency of host switches between these species with different parasitism strategies. Contrary to expected, host switches did not occur more frequently in the generalist than in the specialist brood parasite. We also found that migration between hosts was asymmetrical in most cases and host switches towards one host were more recurrent than backwards, thus differing among hosts within the same species. This might depend on a combination of factors including the rate at which females lay eggs in nests of alternative hosts, fledging success of the chicks in this new host and their subsequent success in parasitizing it. © 2015 European Society For Evolutionary Biology. Fil:Domínguez, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1010061X_v28_n6_p1290_Dominguez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Genetic differentiation Host switches Migration rate Screaming cowbird Shiny cowbird brood parasitism coexistence fledging generalist genetic differentiation host range host selection host specificity migration obligate behavior parental care passerine Aves Molothrus Molothrus bonariensis Molothrus rufoaxillaris genetic marker animal animal dispersal competitive behavior egg laying gene flow genetic marker genetic variation genetics haplotype human molecular genetics nesting Passeriformes physiology population migration species difference Animal Distribution Animal Migration Animals Competitive Behavior Gene Flow Genetic Markers Genetic Variation Haplotypes Humans Molecular Sequence Data Nesting Behavior Oviposition Passeriformes Species Specificity
spellingShingle	Genetic differentiation Host switches Migration rate Screaming cowbird Shiny cowbird brood parasitism coexistence fledging generalist genetic differentiation host range host selection host specificity migration obligate behavior parental care passerine Aves Molothrus Molothrus bonariensis Molothrus rufoaxillaris genetic marker animal animal dispersal competitive behavior egg laying gene flow genetic marker genetic variation genetics haplotype human molecular genetics nesting Passeriformes physiology population migration species difference Animal Distribution Animal Migration Animals Competitive Behavior Gene Flow Genetic Markers Genetic Variation Haplotypes Humans Molecular Sequence Data Nesting Behavior Oviposition Passeriformes Species Specificity Domínguez, M. de la Colina, M.A. Di Giacomo, A.G. Reboreda, J.C. Mahler, B. Host switching in cowbird brood parasites: How often does it occur?
topic_facet	Genetic differentiation Host switches Migration rate Screaming cowbird Shiny cowbird brood parasitism coexistence fledging generalist genetic differentiation host range host selection host specificity migration obligate behavior parental care passerine Aves Molothrus Molothrus bonariensis Molothrus rufoaxillaris genetic marker animal animal dispersal competitive behavior egg laying gene flow genetic marker genetic variation genetics haplotype human molecular genetics nesting Passeriformes physiology population migration species difference Animal Distribution Animal Migration Animals Competitive Behavior Gene Flow Genetic Markers Genetic Variation Haplotypes Humans Molecular Sequence Data Nesting Behavior Oviposition Passeriformes Species Specificity
description	Avian obligate brood parasites lay their eggs in nests of host species, which provide all parental care. Brood parasites may be host specialists, if they use one or a few host species, or host generalists, if they parasitize many hosts. Within the latter, strains of host-specific females might coexist. Although females preferentially parasitize one host, they may occasionally successfully parasitize the nest of another species. These host switching events allow the colonization of new hosts and the expansion of brood parasites into new areas. In this study, we analyse host switching in two parasitic cowbirds, the specialist screaming cowbird (Molothrus rufoaxillaris) and the generalist shiny cowbird (M. bonariensis), and compare the frequency of host switches between these species with different parasitism strategies. Contrary to expected, host switches did not occur more frequently in the generalist than in the specialist brood parasite. We also found that migration between hosts was asymmetrical in most cases and host switches towards one host were more recurrent than backwards, thus differing among hosts within the same species. This might depend on a combination of factors including the rate at which females lay eggs in nests of alternative hosts, fledging success of the chicks in this new host and their subsequent success in parasitizing it. © 2015 European Society For Evolutionary Biology.
format	JOUR
author	Domínguez, M. de la Colina, M.A. Di Giacomo, A.G. Reboreda, J.C. Mahler, B.
author_facet	Domínguez, M. de la Colina, M.A. Di Giacomo, A.G. Reboreda, J.C. Mahler, B.
author_sort	Domínguez, M.
title	Host switching in cowbird brood parasites: How often does it occur?
title_short	Host switching in cowbird brood parasites: How often does it occur?
title_full	Host switching in cowbird brood parasites: How often does it occur?
title_fullStr	Host switching in cowbird brood parasites: How often does it occur?
title_full_unstemmed	Host switching in cowbird brood parasites: How often does it occur?
title_sort	host switching in cowbird brood parasites: how often does it occur?
url	http://hdl.handle.net/20.500.12110/paper_1010061X_v28_n6_p1290_Dominguez
work_keys_str_mv	AT dominguezm hostswitchingincowbirdbroodparasiteshowoftendoesitoccur AT delacolinama hostswitchingincowbirdbroodparasiteshowoftendoesitoccur AT digiacomoag hostswitchingincowbirdbroodparasiteshowoftendoesitoccur AT reboredajc hostswitchingincowbirdbroodparasiteshowoftendoesitoccur AT mahlerb hostswitchingincowbirdbroodparasiteshowoftendoesitoccur
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Host switching in cowbird brood parasites: How often does it occur?

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