Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds

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 p...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2001
Materias:
Agelaius thilius
Brood parasitism
Colonial nesting
Molothrus bonariensis
Nest failure
Shiny Cowbird
Yellow-winged Blackbird
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00105422_v103_n3_p521_Massoni
http://hdl.handle.net/20.500.12110/paper_00105422_v103_n3_p521_Massoni
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00105422_v103_n3_p521_Massoni
record_format dspace
spelling paper:paper_00105422_v103_n3_p521_Massoni2023-06-08T14:34:31Z Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds Agelaius thilius Brood parasitism Colonial nesting Molothrus bonariensis Nest failure Shiny Cowbird Yellow-winged Blackbird Agelaius thilius Molothrus bonariensis 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. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00105422_v103_n3_p521_Massoni http://hdl.handle.net/20.500.12110/paper_00105422_v103_n3_p521_Massoni
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Agelaius thilius
Brood parasitism
Colonial nesting
Molothrus bonariensis
Nest failure
Shiny Cowbird
Yellow-winged Blackbird
Agelaius thilius
Molothrus bonariensis
spellingShingle Agelaius thilius
Brood parasitism
Colonial nesting
Molothrus bonariensis
Nest failure
Shiny Cowbird
Yellow-winged Blackbird
Agelaius thilius
Molothrus bonariensis
Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds
topic_facet Agelaius thilius
Brood parasitism
Colonial nesting
Molothrus bonariensis
Nest failure
Shiny Cowbird
Yellow-winged Blackbird
Agelaius thilius
Molothrus bonariensis
description 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.
title Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds
title_short Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds
title_full Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds
title_fullStr Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds
title_full_unstemmed Number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial Yellow-winged blackbirds
title_sort number of close spatial and temporal neighbors decreases the probability of nest failure and shiny cowbird parasitism in colonial yellow-winged blackbirds
publishDate 2001
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00105422_v103_n3_p521_Massoni
http://hdl.handle.net/20.500.12110/paper_00105422_v103_n3_p521_Massoni
_version_ 1768544893223829504

Ejemplares similares