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Abstract:

The goal of this work was to determine how the foraging behaviour of Akodon azarae changes with predation risk and food availability in cropfield borders of Buenos Aires, Argentina. Our hypotheses were that A. azarae has a greater foraging efficiency in safe areas than in risky ones and that the foraging behaviour of A. azarae also depends on the level of resources. We measured giving-up densities (GUDs) and food consumption twice a year in artificial foraging patches (bottles with known amounts of millet seed) in covered and open areas and with two different levels of seed abundance. In both periods, GUDs were lower in the covered areas than in the open ones independently of food level. Consumption increased with food level in covered areas but not in open areas. Based on these results, we conclude that A. azarae appears to maximize its consumption depending on predation risk. © Japan Ethological Society and Springer 2009.

Registro:

Documento: Artículo
Título:Foraging efficiency of Akodon azarae under different plant cover and resource levels
Autor:Fraschina, J.; Knight, C.; Busch, M.
Filiación:CONICET, Avenida Rivadavia 1917, CP C1033AAJ Ciudad de Buenos Aires, Argentina
Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Av. Intendente Cantilo s/n Ciudad Universitaria, CP 1428 Núñez, Buenos Aires, Argentina
Palabras clave:Constraints; Foraging efficiency; Giving-up density; Predation risk; Rodent; Akodon azarae; Rodentia
Año:2009
Volumen:27
Número:3
Página de inicio:447
Página de fin:452
DOI: http://dx.doi.org/10.1007/s10164-008-0140-x
Título revista:Journal of Ethology
Título revista abreviado:J. Ethol.
ISSN:02890771
CODEN:JOETE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02890771_v27_n3_p447_Fraschina

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Citas:

---------- APA ----------
Fraschina, J., Knight, C. & Busch, M. (2009) . Foraging efficiency of Akodon azarae under different plant cover and resource levels. Journal of Ethology, 27(3), 447-452.
http://dx.doi.org/10.1007/s10164-008-0140-x
---------- CHICAGO ----------
Fraschina, J., Knight, C., Busch, M. "Foraging efficiency of Akodon azarae under different plant cover and resource levels" . Journal of Ethology 27, no. 3 (2009) : 447-452.
http://dx.doi.org/10.1007/s10164-008-0140-x
---------- MLA ----------
Fraschina, J., Knight, C., Busch, M. "Foraging efficiency of Akodon azarae under different plant cover and resource levels" . Journal of Ethology, vol. 27, no. 3, 2009, pp. 447-452.
http://dx.doi.org/10.1007/s10164-008-0140-x
---------- VANCOUVER ----------
Fraschina, J., Knight, C., Busch, M. Foraging efficiency of Akodon azarae under different plant cover and resource levels. J. Ethol. 2009;27(3):447-452.
http://dx.doi.org/10.1007/s10164-008-0140-x