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Abstract:

Interspecific brood parasites, like the shiny cowbird (Molothrus bonariensis), lay eggs in nests of other species. Shiny cowbird females peck and puncture eggs when they parasitize host nests. This behavior increases the survival of cowbird chicks when they have to compete for food with larger nestmates. However, cowbird chicks may benefit from smaller nestmates as they increase food provisioning by parents and the cowbird chicks secure most extra provisioning. We investigated whether egg-pecking behavior by female shiny cowbirds might be adjusted to the competition that their chicks face in host nests. We found that more host eggs are destroyed per cowbird egg laid in a larger-bodied host (chalk-browed mockingbird, Mimus saturninus, 70-75. g) than a smaller-bodied host (house wrens, Troglodytes aedon, 12-13. g). We also tested egg-pecking preferences in choice experiments with female cowbirds in captivity and found cowbirds presented with eggs in artificial nests pecked first and more frequently, and punctured more frequently the larger egg when this was a host egg, but not when this was a cowbird egg. Our results are partially consistent with the hypothesis that shiny cowbird females adaptively adjust their egg pecking behavior according to the competition that their chicks face in host nests. © 2011 Elsevier B.V.

Registro:

Documento: Artículo
Título:Do shiny cowbird females adjust egg pecking behavior according to the level of competition their chicks face in host nests?
Autor:Tuero, D.T.; Fiorini, V.D.; Reboreda, J.C.
Filiación:Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
Palabras clave:Brood parasitism; Cowbirds; Egg punctures; Molothrus; Virulence; artificial nest; behavioral ecology; brood parasitism; captivity; egg; female; food provisioning; interspecific competition; nest; nestmate recognition; songbird; survival; virulence; animal behavior; article; bird; chick; egg; egg pecking behavior; female; interspecific competition; Mimus saturninus; Molothrus bonariensis; nesting; nonhuman; Troglodytes aedon; Aggression; Animals; Choice Behavior; Competitive Behavior; Eggs; Female; Nesting Behavior; Passeriformes; Mimus saturninus; Molothrus; Molothrus bonariensis; Troglodytes; Troglodytes aedon
Año:2012
Volumen:89
Número:2
Página de inicio:137
Página de fin:142
DOI: http://dx.doi.org/10.1016/j.beproc.2011.10.012
Título revista:Behavioural Processes
Título revista abreviado:Behav. Processes
ISSN:03766357
CODEN:BPROD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03766357_v89_n2_p137_Tuero

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Citas:

---------- APA ----------
Tuero, D.T., Fiorini, V.D. & Reboreda, J.C. (2012) . Do shiny cowbird females adjust egg pecking behavior according to the level of competition their chicks face in host nests?. Behavioural Processes, 89(2), 137-142.
http://dx.doi.org/10.1016/j.beproc.2011.10.012
---------- CHICAGO ----------
Tuero, D.T., Fiorini, V.D., Reboreda, J.C. "Do shiny cowbird females adjust egg pecking behavior according to the level of competition their chicks face in host nests?" . Behavioural Processes 89, no. 2 (2012) : 137-142.
http://dx.doi.org/10.1016/j.beproc.2011.10.012
---------- MLA ----------
Tuero, D.T., Fiorini, V.D., Reboreda, J.C. "Do shiny cowbird females adjust egg pecking behavior according to the level of competition their chicks face in host nests?" . Behavioural Processes, vol. 89, no. 2, 2012, pp. 137-142.
http://dx.doi.org/10.1016/j.beproc.2011.10.012
---------- VANCOUVER ----------
Tuero, D.T., Fiorini, V.D., Reboreda, J.C. Do shiny cowbird females adjust egg pecking behavior according to the level of competition their chicks face in host nests?. Behav. Processes. 2012;89(2):137-142.
http://dx.doi.org/10.1016/j.beproc.2011.10.012