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Abstract:

Parasitized hosts of the Shiny Cowbird (Molothrus bonariensis) suffer several costs, and among the most important is the loss of eggs through egg punctures inflicted by the parasite. Unparasitized nests also have eggs damaged by cowbirds, but researchers usually ignore these losses. To quantify this cost we compared three groups of nests of the Yellow-winged Blackbird (Agelaius thilius): parasitized and unparasitized nests from an area used by Shiny Cowbirds, and unparasitized nests from an area not used by the parasite. Because cowbirds puncture eggs as soon as the first host eggs are laid, we calculated the clutch size only for those nests found during construction. Unparasitized nests in the area used by cowbirds had lower egg survival rate and hatching success and higher probability of nest desertion than unparasitized nests in the cowbird-free area. Our results indicate that one must consider egg punctures at unparasitized nests to avoid underestimating the impact of parasitism.

Registro:

Documento: Artículo
Título:A neglected cost of brood parasitism: Egg punctures by Shiny Cowbirds during inspection of potential host nests
Autor:Massoni, V.; Reboreda, J.C.
Filiación:Departamento de Ciencias Biologicas, Facul. de Cie. Exactas y Naturales, Universidad de Buenos Aires, C1428EHA Buenos Aires, Argentina
Palabras clave:Agelaius thilius; Brood parasitism; Costs of parasitism; Egg punctures; Molothrus bonariensis; Shiny Cowbird; Yellow-winged Blackbird; Agelaius; Agelaius thilius; Agelaius thilius; Molothrus; Molothrus bonariensis; Molothrus bonariensis; Turdus merula
Año:2002
Volumen:104
Número:2
Página de inicio:407
Página de fin:412
DOI: http://dx.doi.org/10.1650/0010-5422(2002)104[0407:ANCOBP]2.0.CO;2
Título revista:Condor
Título revista abreviado:Condor
ISSN:00105422
CODEN:CNDRA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00105422_v104_n2_p407_Massoni

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Citas:

---------- APA ----------
Massoni, V. & Reboreda, J.C. (2002) . A neglected cost of brood parasitism: Egg punctures by Shiny Cowbirds during inspection of potential host nests. Condor, 104(2), 407-412.
http://dx.doi.org/10.1650/0010-5422(2002)104[0407:ANCOBP]2.0.CO;2
---------- CHICAGO ----------
Massoni, V., Reboreda, J.C. "A neglected cost of brood parasitism: Egg punctures by Shiny Cowbirds during inspection of potential host nests" . Condor 104, no. 2 (2002) : 407-412.
http://dx.doi.org/10.1650/0010-5422(2002)104[0407:ANCOBP]2.0.CO;2
---------- MLA ----------
Massoni, V., Reboreda, J.C. "A neglected cost of brood parasitism: Egg punctures by Shiny Cowbirds during inspection of potential host nests" . Condor, vol. 104, no. 2, 2002, pp. 407-412.
http://dx.doi.org/10.1650/0010-5422(2002)104[0407:ANCOBP]2.0.CO;2
---------- VANCOUVER ----------
Massoni, V., Reboreda, J.C. A neglected cost of brood parasitism: Egg punctures by Shiny Cowbirds during inspection of potential host nests. Condor. 2002;104(2):407-412.
http://dx.doi.org/10.1650/0010-5422(2002)104[0407:ANCOBP]2.0.CO;2