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Abstract:

The Striated Caracara (Phalcoboenus australis) is a poorly known raptor associated with seabird colonies, restricted to the islands of southern South America, and with an estimated extant population of <2,500 mature individuals. We evaluated the number of breeding pairs, described the characteristics and spatial pattern of nest sites, and estimated breeding output of a population of Striated Caracaras in Franklin Bay, Staten Island, Argentina. We found one of the lower breeding density values reported for this species, although this population is associated with one of the biggest colonies of Rockhopper Penguins. The main material used for the construction of Striated Caracaras' nests was tussac grass, though only half of nests were placed in grassland. The spatial pattern for nest sites corresponds with global and local clustering. All successful Striated Caracaras' nests were at least 250 m from the nearest neighboring nest, were generally closer to the colony of Rockhopper Penguins than failed nests, and had more Rockhopper patches around them. Breeding success was 0.73 successful nests/active nests, productivity was 1.27 ± 1.01 young/active nest, and brood size was 1.75 ± 0.71 young/successful nest. The presence of invasive wild goats and red deer is proposed as a factor that could be restricting nest site availability in the study area. © 2017 Wilson Ornithological Society. All rights reserved.

Registro:

Documento: Artículo
Título:Status and Reproductive Outcome of the Breeding Population of Striated Caracaras (Phalcoboenus australis) at Franklin Bay, Staten Island, Argentina
Autor:Balza, U.; Lois, N.A.; Raya Rey, A.
Filiación:Laboratorio de Ecología y Conservación la Vida Silvestre, Centro Austral de Investigaciones Científicas (CADIC-CONICET), Bernardo Houssay 200, Ushuaia, Argentina
Laboratorio de Ecología y Comportamiento Animal, Instituto de Ecología, Genética y Evolución (IEGEBACONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Buenos Aires, Argentina
Instituto de Ciencias Polares, Ambiente y Recursos Naturales (ICPA), Universidad Nacional de Tierra Del Fuego (UNTdF), Leandro N. Alem 1036, Ushuaia, Argentina
Palabras clave:Breeding output; Invasive species; Nest site availability; Spatial analysis; breeding population; brood size; colony; habitat availability; invasive species; nest site; nest structure; raptor; reproductive biology; reproductive success; seabird; spatial analysis; Argentina; Canada; Franklin Bay; Northwest Territories; South America; Capra aegagrus; Caracara; Cervus elaphus; Falconidae; Phalcoboenus australis; Raptores; Spheniscidae
Año:2017
Volumen:129
Número:4
Página de inicio:890
Página de fin:898
DOI: http://dx.doi.org/10.1676/16-189.1
Título revista:Wilson Journal of Ornithology
Título revista abreviado:Wilson J. Ornithol.
ISSN:15594491
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15594491_v129_n4_p890_Balza

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Citas:

---------- APA ----------
Balza, U., Lois, N.A. & Raya Rey, A. (2017) . Status and Reproductive Outcome of the Breeding Population of Striated Caracaras (Phalcoboenus australis) at Franklin Bay, Staten Island, Argentina. Wilson Journal of Ornithology, 129(4), 890-898.
http://dx.doi.org/10.1676/16-189.1
---------- CHICAGO ----------
Balza, U., Lois, N.A., Raya Rey, A. "Status and Reproductive Outcome of the Breeding Population of Striated Caracaras (Phalcoboenus australis) at Franklin Bay, Staten Island, Argentina" . Wilson Journal of Ornithology 129, no. 4 (2017) : 890-898.
http://dx.doi.org/10.1676/16-189.1
---------- MLA ----------
Balza, U., Lois, N.A., Raya Rey, A. "Status and Reproductive Outcome of the Breeding Population of Striated Caracaras (Phalcoboenus australis) at Franklin Bay, Staten Island, Argentina" . Wilson Journal of Ornithology, vol. 129, no. 4, 2017, pp. 890-898.
http://dx.doi.org/10.1676/16-189.1
---------- VANCOUVER ----------
Balza, U., Lois, N.A., Raya Rey, A. Status and Reproductive Outcome of the Breeding Population of Striated Caracaras (Phalcoboenus australis) at Franklin Bay, Staten Island, Argentina. Wilson J. Ornithol. 2017;129(4):890-898.
http://dx.doi.org/10.1676/16-189.1