Host-parasite coevolution beyond the nestling stage? Mimicry of host fledglings by the specialist screaming cowbird

textbook examples of host-parasite coevolution. By contrast, reciprocal adaptations and counteradaptations beyond the egg stage in brood parasites and their hosts have received less attention. The screaming cowbird (Molothrus rufoaxillaris) is a specialist obligate brood parasite whose fledglings lo...

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Autores principales:	De Mársico, M.C., Gantchoff, M.G., Reboreda, J.C.
Formato:	JOUR
Materias:	Brood parasitism Chick rejection Coevolution Cowbird Mimicry Visual modelling adaptation brood parasitism coevolution fledging host-parasite interaction mimicry nestling passerine plumage specialist survival visual cue Molothrus Molothrus bonariensis Molothrus rufoaxillaris
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_09628452_v279_n1742_p3401_DeMarsico
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_09628452_v279_n1742_p3401_DeMarsico
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spelling	todo:paper_09628452_v279_n1742_p3401_DeMarsico2023-10-03T15:54:18Z Host-parasite coevolution beyond the nestling stage? Mimicry of host fledglings by the specialist screaming cowbird De Mársico, M.C. Gantchoff, M.G. Reboreda, J.C. Brood parasitism Chick rejection Coevolution Cowbird Mimicry Visual modelling adaptation brood parasitism coevolution fledging host-parasite interaction mimicry nestling passerine plumage specialist survival visual cue Molothrus Molothrus bonariensis Molothrus rufoaxillaris textbook examples of host-parasite coevolution. By contrast, reciprocal adaptations and counteradaptations beyond the egg stage in brood parasites and their hosts have received less attention. The screaming cowbird (Molothrus rufoaxillaris) is a specialist obligate brood parasite whose fledglings look identical to those of its primary host, the baywing (Agelaioides badius). Such a resemblance has been proposed as an adaptation in response to host discrimination against odd-looking young, but evidence supporting this idea is scarce. Here, we examined this hypothesis by comparing the survival rates of young screaming cowbirds and non-mimetic shiny cowbirds (Molothrus bonariensis) cross-fostered to baywing nests and quantifying the similarity in plumage colour and begging calls between host and cowbird fledglings. Shiny cowbirds suffered higher post-fledging mortality rates (83%) than screaming cowbirds (0%) owing to host rejection. Visual modelling revealed that screaming cowbirds, but not shiny cowbirds, were indistinguishable from host young in plumage colour. Similarly, screaming cowbirds matched baywings' begging calls more closely than shiny cowbirds. Our results strongly support the occurrence of host fledgling mimicry in screaming cowbirds and suggest a role of visual and vocal cues in fledgling discrimination by baywings. © 2012 The Royal Society. Fil:De Mársico, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gantchoff, M.G. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09628452_v279_n1742_p3401_DeMarsico
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 Chick rejection Coevolution Cowbird Mimicry Visual modelling adaptation brood parasitism coevolution fledging host-parasite interaction mimicry nestling passerine plumage specialist survival visual cue Molothrus Molothrus bonariensis Molothrus rufoaxillaris
spellingShingle	Brood parasitism Chick rejection Coevolution Cowbird Mimicry Visual modelling adaptation brood parasitism coevolution fledging host-parasite interaction mimicry nestling passerine plumage specialist survival visual cue Molothrus Molothrus bonariensis Molothrus rufoaxillaris De Mársico, M.C. Gantchoff, M.G. Reboreda, J.C. Host-parasite coevolution beyond the nestling stage? Mimicry of host fledglings by the specialist screaming cowbird
topic_facet	Brood parasitism Chick rejection Coevolution Cowbird Mimicry Visual modelling adaptation brood parasitism coevolution fledging host-parasite interaction mimicry nestling passerine plumage specialist survival visual cue Molothrus Molothrus bonariensis Molothrus rufoaxillaris
description	textbook examples of host-parasite coevolution. By contrast, reciprocal adaptations and counteradaptations beyond the egg stage in brood parasites and their hosts have received less attention. The screaming cowbird (Molothrus rufoaxillaris) is a specialist obligate brood parasite whose fledglings look identical to those of its primary host, the baywing (Agelaioides badius). Such a resemblance has been proposed as an adaptation in response to host discrimination against odd-looking young, but evidence supporting this idea is scarce. Here, we examined this hypothesis by comparing the survival rates of young screaming cowbirds and non-mimetic shiny cowbirds (Molothrus bonariensis) cross-fostered to baywing nests and quantifying the similarity in plumage colour and begging calls between host and cowbird fledglings. Shiny cowbirds suffered higher post-fledging mortality rates (83%) than screaming cowbirds (0%) owing to host rejection. Visual modelling revealed that screaming cowbirds, but not shiny cowbirds, were indistinguishable from host young in plumage colour. Similarly, screaming cowbirds matched baywings' begging calls more closely than shiny cowbirds. Our results strongly support the occurrence of host fledgling mimicry in screaming cowbirds and suggest a role of visual and vocal cues in fledgling discrimination by baywings. © 2012 The Royal Society.
format	JOUR
author	De Mársico, M.C. Gantchoff, M.G. Reboreda, J.C.
author_facet	De Mársico, M.C. Gantchoff, M.G. Reboreda, J.C.
author_sort	De Mársico, M.C.
title	Host-parasite coevolution beyond the nestling stage? Mimicry of host fledglings by the specialist screaming cowbird
title_short	Host-parasite coevolution beyond the nestling stage? Mimicry of host fledglings by the specialist screaming cowbird
title_full	Host-parasite coevolution beyond the nestling stage? Mimicry of host fledglings by the specialist screaming cowbird
title_fullStr	Host-parasite coevolution beyond the nestling stage? Mimicry of host fledglings by the specialist screaming cowbird
title_full_unstemmed	Host-parasite coevolution beyond the nestling stage? Mimicry of host fledglings by the specialist screaming cowbird
title_sort	host-parasite coevolution beyond the nestling stage? mimicry of host fledglings by the specialist screaming cowbird
url	http://hdl.handle.net/20.500.12110/paper_09628452_v279_n1742_p3401_DeMarsico
work_keys_str_mv	AT demarsicomc hostparasitecoevolutionbeyondthenestlingstagemimicryofhostfledglingsbythespecialistscreamingcowbird AT gantchoffmg hostparasitecoevolutionbeyondthenestlingstagemimicryofhostfledglingsbythespecialistscreamingcowbird AT reboredajc hostparasitecoevolutionbeyondthenestlingstagemimicryofhostfledglingsbythespecialistscreamingcowbird
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Host-parasite coevolution beyond the nestling stage? Mimicry of host fledglings by the specialist screaming cowbird

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