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Abstract:

We investigated whether the synchrony and proximity of nests of Yellow-winged Blackbirds (Agelaius thilius) provided protection against nest predation or brood parasitism by Shiny Cowbirds (Molothrus bonariensis). We analyzed the effect of the temporal aggregation of nests on the daily probability per nest of predation, desertion, egg punctures, and parasitism throughout the breeding season. The probabilities of nest predation and nest desertion increased through the breeding season. The temporal aggregation of nests was negatively associated with the probability of nest desertion, egg punctures, and parasitism, but there was no association with the probability of nest predation. We also analyzed the effect of the number of close neighbor nests on the daily probability per nest of predation, desertion, egg punctures, and brood parasitism. The spatial aggregation of nests was negatively associated with the probability of nest failure and brood parasitism, but there was no association with the probability of egg punctures. We discuss whether dilution effect or group defense, two mechanisms proposed to explain the antipredatory advantages of colonial nesting, are likely to apply to our system.

Registro:

Documento: Artículo
Título:Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds
Autor:Massoni, V.; Reboreda, J.C.
Filiación:Departamento de Ciencias Biologicas, Facultad Ciencias Exactas Naturales, Universidad de Buenos Aires, C1428EHA Buenos Aires, Argentina
Palabras clave:Agelaius thilius; Brood parasitism; Colonial nesting; Molothrus bonariensis; Nest failure; Shiny Cowbird; Yellow-winged Blackbird; Agelaius thilius; Molothrus bonariensis
Año:2001
Volumen:103
Número:3
Página de inicio:521
Página de fin:529
DOI: http://dx.doi.org/10.1650/0010-5422(2001)103[0521:NOCSAT]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_v103_n3_p521_Massoni

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Citas:

---------- APA ----------
Massoni, V. & Reboreda, J.C. (2001) . Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds. Condor, 103(3), 521-529.
http://dx.doi.org/10.1650/0010-5422(2001)103[0521:NOCSAT]2.0.CO;2
---------- CHICAGO ----------
Massoni, V., Reboreda, J.C. "Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds" . Condor 103, no. 3 (2001) : 521-529.
http://dx.doi.org/10.1650/0010-5422(2001)103[0521:NOCSAT]2.0.CO;2
---------- MLA ----------
Massoni, V., Reboreda, J.C. "Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds" . Condor, vol. 103, no. 3, 2001, pp. 521-529.
http://dx.doi.org/10.1650/0010-5422(2001)103[0521:NOCSAT]2.0.CO;2
---------- VANCOUVER ----------
Massoni, V., Reboreda, J.C. Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds. Condor. 2001;103(3):521-529.
http://dx.doi.org/10.1650/0010-5422(2001)103[0521:NOCSAT]2.0.CO;2