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Abstract:

Unlike other birds, shiny cowbirds (Molothrus bonariensis) must locate host nests where to lay their eggs and then decide whether to parasitise them. They should also synchronise their laying with that of the host to increase the survival of parasite egg and young. Shiny cowbirds can discover nests using host behaviour as a cue, or by searching the habitat without need for the presence of a host. Besides, they can synchronise parasitism with host laying by monitoring nests during building and laying, or directly by assessing the degree of development of embryos through the puncture of host eggs. Alternatively, synchronization can arise by lower nest attentiveness during host laying. We determined the extent of synchronization between laying of shiny cowbirds and chalk-browed mockingbirds (Mimus saturninus) and estimated if parasitism was negatively associated with host nest attentiveness. We also conducted an experiment to test if host activity was necessary to locate nests, and if puncture of host eggs was a cue for deciding parasitism. Shiny cowbirds synchronised parasitism with host laying in 75% of the cases and synchronization was not explained by lower host nest attentiveness during laying. Shiny cowbirds located nests without need for presence of a host, but the decision of parasitising the nest depended on host activity at the nest. The information that shiny cowbirds could obtain through egg punctures was not necessary for deciding parasitism. Our results indicate that shiny cowbirds rely on the precise timing of their eggs and avoid laying in unsuitable nests. © Springer-Verlag 2006.

Registro:

Documento: Artículo
Título:Cues used by shiny cowbirds (Molothrus bonariensis) to locate and parasitise chalk-browed mockingbird (Mimus saturninus) nests
Autor:Fiorini, V.D.; Reboreda, J.C.
Filiación:Departamento de Ecología, Genética Y Evolución, Facultad de Ciencias Exactas Y Naturales, Pabellón II Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
Palabras clave:Brood parasitism; Chalk-browed mockingbird; Egg punctures; Mimus saturninus; Molothrus bonariensis; Nest location; Shiny cowbird; behavioral ecology; bird; brood parasitism; egg production; egg size; embryonic development; experimental study; nest site; parasite intensity; survival; synchrony; Aves; Mimus saturninus; Molothrus bonariensis
Año:2006
Volumen:60
Número:3
Página de inicio:379
Página de fin:385
DOI: http://dx.doi.org/10.1007/s00265-006-0175-3
Título revista:Behavioral Ecology and Sociobiology
Título revista abreviado:Behav. Ecol. Sociobiol.
ISSN:03405443
CODEN:BESOD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03405443_v60_n3_p379_Fiorini

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Citas:

---------- APA ----------
Fiorini, V.D. & Reboreda, J.C. (2006) . Cues used by shiny cowbirds (Molothrus bonariensis) to locate and parasitise chalk-browed mockingbird (Mimus saturninus) nests. Behavioral Ecology and Sociobiology, 60(3), 379-385.
http://dx.doi.org/10.1007/s00265-006-0175-3
---------- CHICAGO ----------
Fiorini, V.D., Reboreda, J.C. "Cues used by shiny cowbirds (Molothrus bonariensis) to locate and parasitise chalk-browed mockingbird (Mimus saturninus) nests" . Behavioral Ecology and Sociobiology 60, no. 3 (2006) : 379-385.
http://dx.doi.org/10.1007/s00265-006-0175-3
---------- MLA ----------
Fiorini, V.D., Reboreda, J.C. "Cues used by shiny cowbirds (Molothrus bonariensis) to locate and parasitise chalk-browed mockingbird (Mimus saturninus) nests" . Behavioral Ecology and Sociobiology, vol. 60, no. 3, 2006, pp. 379-385.
http://dx.doi.org/10.1007/s00265-006-0175-3
---------- VANCOUVER ----------
Fiorini, V.D., Reboreda, J.C. Cues used by shiny cowbirds (Molothrus bonariensis) to locate and parasitise chalk-browed mockingbird (Mimus saturninus) nests. Behav. Ecol. Sociobiol. 2006;60(3):379-385.
http://dx.doi.org/10.1007/s00265-006-0175-3