Utilization of a new host in the screaming cowbird Molothrus rufoaxillaris, a host specialist brood parasite: Host switch or host acquisition?

The screaming cowbird Molothrus rufoaxillaris has been long known as a host specialist brood parasite. However, in the past years, the utilization of two new hosts has been documented. We examined the variation in mitochondrial control region sequences from screaming cowbird chicks found in the nest...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Mahler, Bettina, Confalonieri, Viviana Andrea, Reboreda, Juan Carlos
Publicado: 2009
Materias:
Brood parasitism
Host selection
Host specificity
Molothrus rufoaxillaris
mtDNA
Screaming cowbird
brood parasitism
host selection
host specificity
host use
host-parasite interaction
mitochondrial DNA
passerine
Gnorimopsar chopi
Turdus merula
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03405443_v63_n11_p1603_Mahler
http://hdl.handle.net/20.500.12110/paper_03405443_v63_n11_p1603_Mahler
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03405443_v63_n11_p1603_Mahler
record_format dspace
spelling paper:paper_03405443_v63_n11_p1603_Mahler2023-06-08T15:34:02Z Utilization of a new host in the screaming cowbird Molothrus rufoaxillaris, a host specialist brood parasite: Host switch or host acquisition? Mahler, Bettina Confalonieri, Viviana Andrea Reboreda, Juan Carlos Brood parasitism Host selection Host specificity Molothrus rufoaxillaris mtDNA Screaming cowbird brood parasitism host selection host specificity host use host-parasite interaction mitochondrial DNA passerine Gnorimopsar chopi Molothrus rufoaxillaris Turdus merula The screaming cowbird Molothrus rufoaxillaris has been long known as a host specialist brood parasite. However, in the past years, the utilization of two new hosts has been documented. We examined the variation in mitochondrial control region sequences from screaming cowbird chicks found in the nests of two hosts, the bay-winged cowbird (Agelaioides badius), which is its regular host, and the chopi blackbird (Gnorimopsar chopi), which is a new host, in Formosa Province, Argentina. If a group of females switched to this new host, we expected to find an association between host use and haplotype frequency distribution, indicating the presence of host-specific female lineages, whereas we expected no such association if the cowbird population incorporated this new host and females use both hosts simultaneously. Haplotype frequency distributions differed between cowbird chicks from the nests of both hosts. This indicates that nest choice by females of this brood parasite is not random and that they preferentially parasitize the nests of the same host species. © 2009 Springer-Verlag. Fil:Mahler, B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Confalonieri, V.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. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03405443_v63_n11_p1603_Mahler http://hdl.handle.net/20.500.12110/paper_03405443_v63_n11_p1603_Mahler
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Brood parasitism
Host selection
Host specificity
Molothrus rufoaxillaris
mtDNA
Screaming cowbird
brood parasitism
host selection
host specificity
host use
host-parasite interaction
mitochondrial DNA
passerine
Gnorimopsar chopi
Molothrus rufoaxillaris
Turdus merula
spellingShingle Brood parasitism
Host selection
Host specificity
Molothrus rufoaxillaris
mtDNA
Screaming cowbird
brood parasitism
host selection
host specificity
host use
host-parasite interaction
mitochondrial DNA
passerine
Gnorimopsar chopi
Molothrus rufoaxillaris
Turdus merula
Mahler, Bettina
Confalonieri, Viviana Andrea
Reboreda, Juan Carlos
Utilization of a new host in the screaming cowbird Molothrus rufoaxillaris, a host specialist brood parasite: Host switch or host acquisition?
topic_facet Brood parasitism
Host selection
Host specificity
Molothrus rufoaxillaris
mtDNA
Screaming cowbird
brood parasitism
host selection
host specificity
host use
host-parasite interaction
mitochondrial DNA
passerine
Gnorimopsar chopi
Molothrus rufoaxillaris
Turdus merula
description The screaming cowbird Molothrus rufoaxillaris has been long known as a host specialist brood parasite. However, in the past years, the utilization of two new hosts has been documented. We examined the variation in mitochondrial control region sequences from screaming cowbird chicks found in the nests of two hosts, the bay-winged cowbird (Agelaioides badius), which is its regular host, and the chopi blackbird (Gnorimopsar chopi), which is a new host, in Formosa Province, Argentina. If a group of females switched to this new host, we expected to find an association between host use and haplotype frequency distribution, indicating the presence of host-specific female lineages, whereas we expected no such association if the cowbird population incorporated this new host and females use both hosts simultaneously. Haplotype frequency distributions differed between cowbird chicks from the nests of both hosts. This indicates that nest choice by females of this brood parasite is not random and that they preferentially parasitize the nests of the same host species. © 2009 Springer-Verlag.
author Mahler, Bettina
Confalonieri, Viviana Andrea
Reboreda, Juan Carlos
author_facet Mahler, Bettina
Confalonieri, Viviana Andrea
Reboreda, Juan Carlos
author_sort Mahler, Bettina
title Utilization of a new host in the screaming cowbird Molothrus rufoaxillaris, a host specialist brood parasite: Host switch or host acquisition?
title_short Utilization of a new host in the screaming cowbird Molothrus rufoaxillaris, a host specialist brood parasite: Host switch or host acquisition?
title_full Utilization of a new host in the screaming cowbird Molothrus rufoaxillaris, a host specialist brood parasite: Host switch or host acquisition?
title_fullStr Utilization of a new host in the screaming cowbird Molothrus rufoaxillaris, a host specialist brood parasite: Host switch or host acquisition?
title_full_unstemmed Utilization of a new host in the screaming cowbird Molothrus rufoaxillaris, a host specialist brood parasite: Host switch or host acquisition?
title_sort utilization of a new host in the screaming cowbird molothrus rufoaxillaris, a host specialist brood parasite: host switch or host acquisition?
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03405443_v63_n11_p1603_Mahler
http://hdl.handle.net/20.500.12110/paper_03405443_v63_n11_p1603_Mahler
work_keys_str_mv AT mahlerbettina utilizationofanewhostinthescreamingcowbirdmolothrusrufoaxillarisahostspecialistbroodparasitehostswitchorhostacquisition
AT confalonierivivianaandrea utilizationofanewhostinthescreamingcowbirdmolothrusrufoaxillarisahostspecialistbroodparasitehostswitchorhostacquisition
AT reboredajuancarlos utilizationofanewhostinthescreamingcowbirdmolothrusrufoaxillarisahostspecialistbroodparasitehostswitchorhostacquisition
_version_ 1768546398778687488

Ejemplares similares