Dense canopy cover over House Wren (Troglodytes aedon) nests increases latency of brood parasitism by Shiny Cowbirds (Molothrus bonariensis)

Obligate brood parasites must find host nests in which to lay their eggs. The search for a suitable host nest is predicted to be more difficult if the host nest is well-concealed by vegetation (nest-concealment hypothesis) and brood parasitism of better concealed nests should be less common than par...

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Autores principales: Fiorini, V.D., Tuero, D.T., Reboreda, J.C.
Formato: JOUR
Materias:
nest cover
nest-concealment hypothesis
brood parasitism
canopy architecture
concealment behavior
experimental study
host-parasite interaction
hypothesis testing
incubation
mortality
nest box
obligate behavior
passerine
reproductive success
woodland
Molothrus bonariensis
Troglodytes
Troglodytes aedon
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01584197_v112_n1_p55_Fiorini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01584197_v112_n1_p55_Fiorini
record_format dspace
spelling todo:paper_01584197_v112_n1_p55_Fiorini2023-10-03T15:01:11Z Dense canopy cover over House Wren (Troglodytes aedon) nests increases latency of brood parasitism by Shiny Cowbirds (Molothrus bonariensis) Fiorini, V.D. Tuero, D.T. Reboreda, J.C. nest cover nest-concealment hypothesis brood parasitism canopy architecture concealment behavior experimental study host-parasite interaction hypothesis testing incubation mortality nest box obligate behavior passerine reproductive success woodland Molothrus bonariensis Troglodytes Troglodytes aedon Obligate brood parasites must find host nests in which to lay their eggs. The search for a suitable host nest is predicted to be more difficult if the host nest is well-concealed by vegetation (nest-concealment hypothesis) and brood parasitism of better concealed nests should be less common than parasitism of less well-concealed nests. We experimentally tested this hypothesis by placing nest-boxes used by House Wrens (Troglodytes aedon) in woodland sites with sparse and dense canopy cover and measuring the frequency (proportion of nests parasitised), latency (days elapsed since laying of the first host egg and parasitism), and intensity (number of parasite eggs in parasitised nests) of parasitism by Shiny Cowbirds (Molothrus bonariensis). The frequency and intensity of parasitism did not differ between sites with sparse or dense canopy cover, but the latency of parasitism was shorter in sites with sparse cover than in sites with denser cover. Brood parasites that find host nests more quickly have higher reproductive success, whereas House Wrens have higher reproductive success when parasites lay their eggs later during the incubation period, owing to reduced mortality of host nestlings. Because woodland degradation is associated with sparser canopy cover, host species nesting in degraded woodlands may suffer more from parasitism than those nesting in protected woodlands. © 2012 Royal Australasian Ornithologists Union. Fil:Fiorini, V.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tuero, D.T. 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_01584197_v112_n1_p55_Fiorini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic nest cover
nest-concealment hypothesis
brood parasitism
canopy architecture
concealment behavior
experimental study
host-parasite interaction
hypothesis testing
incubation
mortality
nest box
obligate behavior
passerine
reproductive success
woodland
Molothrus bonariensis
Troglodytes
Troglodytes aedon
spellingShingle nest cover
nest-concealment hypothesis
brood parasitism
canopy architecture
concealment behavior
experimental study
host-parasite interaction
hypothesis testing
incubation
mortality
nest box
obligate behavior
passerine
reproductive success
woodland
Molothrus bonariensis
Troglodytes
Troglodytes aedon
Fiorini, V.D.
Tuero, D.T.
Reboreda, J.C.
Dense canopy cover over House Wren (Troglodytes aedon) nests increases latency of brood parasitism by Shiny Cowbirds (Molothrus bonariensis)
topic_facet nest cover
nest-concealment hypothesis
brood parasitism
canopy architecture
concealment behavior
experimental study
host-parasite interaction
hypothesis testing
incubation
mortality
nest box
obligate behavior
passerine
reproductive success
woodland
Molothrus bonariensis
Troglodytes
Troglodytes aedon
description Obligate brood parasites must find host nests in which to lay their eggs. The search for a suitable host nest is predicted to be more difficult if the host nest is well-concealed by vegetation (nest-concealment hypothesis) and brood parasitism of better concealed nests should be less common than parasitism of less well-concealed nests. We experimentally tested this hypothesis by placing nest-boxes used by House Wrens (Troglodytes aedon) in woodland sites with sparse and dense canopy cover and measuring the frequency (proportion of nests parasitised), latency (days elapsed since laying of the first host egg and parasitism), and intensity (number of parasite eggs in parasitised nests) of parasitism by Shiny Cowbirds (Molothrus bonariensis). The frequency and intensity of parasitism did not differ between sites with sparse or dense canopy cover, but the latency of parasitism was shorter in sites with sparse cover than in sites with denser cover. Brood parasites that find host nests more quickly have higher reproductive success, whereas House Wrens have higher reproductive success when parasites lay their eggs later during the incubation period, owing to reduced mortality of host nestlings. Because woodland degradation is associated with sparser canopy cover, host species nesting in degraded woodlands may suffer more from parasitism than those nesting in protected woodlands. © 2012 Royal Australasian Ornithologists Union.
format JOUR
author Fiorini, V.D.
Tuero, D.T.
Reboreda, J.C.
author_facet Fiorini, V.D.
Tuero, D.T.
Reboreda, J.C.
author_sort Fiorini, V.D.
title Dense canopy cover over House Wren (Troglodytes aedon) nests increases latency of brood parasitism by Shiny Cowbirds (Molothrus bonariensis)
title_short Dense canopy cover over House Wren (Troglodytes aedon) nests increases latency of brood parasitism by Shiny Cowbirds (Molothrus bonariensis)
title_full Dense canopy cover over House Wren (Troglodytes aedon) nests increases latency of brood parasitism by Shiny Cowbirds (Molothrus bonariensis)
title_fullStr Dense canopy cover over House Wren (Troglodytes aedon) nests increases latency of brood parasitism by Shiny Cowbirds (Molothrus bonariensis)
title_full_unstemmed Dense canopy cover over House Wren (Troglodytes aedon) nests increases latency of brood parasitism by Shiny Cowbirds (Molothrus bonariensis)
title_sort dense canopy cover over house wren (troglodytes aedon) nests increases latency of brood parasitism by shiny cowbirds (molothrus bonariensis)
url http://hdl.handle.net/20.500.12110/paper_01584197_v112_n1_p55_Fiorini
work_keys_str_mv AT fiorinivd densecanopycoveroverhousewrentroglodytesaedonnestsincreaseslatencyofbroodparasitismbyshinycowbirdsmolothrusbonariensis
AT tuerodt densecanopycoveroverhousewrentroglodytesaedonnestsincreaseslatencyofbroodparasitismbyshinycowbirdsmolothrusbonariensis
AT reboredajc densecanopycoveroverhousewrentroglodytesaedonnestsincreaseslatencyofbroodparasitismbyshinycowbirdsmolothrusbonariensis
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