Microhabitat nest cover effect on nest survival of the Red-Crested Cardinal

Authors
Segura, Luciano Noel; Masson, Diego; Gantchoff, Mariela G.
Publication Year
2012
Language
English
Format
article
Status
Published version
Description
Predation is the primary cause of nest failure of birds and factors affecting predation risk have shaped the evolution of avian life histories. We evaluated the influence of microhabitat vegetation cover on Red-crested Cardinal (Paroaria coronata) nest survival in natural forests of central eastern Argentina. Using program MARK, we analyzed patterns of daily nest survival regarding variation of nest cover. In addition, we evaluated the effect of the date within the breeding season on nest survival. We found a cumulative probability of nest survival of 19% with daily nest survival rates increasing significantly with vegetation cover above the nest and decreasing linearly throughout the season. Increased cover most likely helped conceal and protect nests, and since vegetation above the nest had the highest impact, main predators are probably aerial. Also, decline in nest success with date might correspond to an increase in predator abundance and movement later in the breeding season. We suggest taking into consideration these patterns for future conservation and management of Red-crested Cardinal natural populations, as well as for studies in the evolution of avian life histories in tropical and south temperate species.
Fil: Segura, Luciano Noel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Ecología y Comportamiento Animal; Argentina
Fil: Masson, Diego. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
Fil: Gantchoff, Mariela G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Ecología y Comportamiento Animal; Argentina
Subject
nest success
microhabitat cover
predation rates
Mark
Otras Ciencias Biológicas
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/68209