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Abstract:

We employed a live trapping grid to analyse the effect of heterogeneity habitat on dispersion of Akodon azarae, Oxymycterus rutilans and Oryzomys deificóla. The reproduction and survival of three species are associated with their residency in the grassland, avoided the use of woodland. A. azarae reproductive and non-reproductive individuals preferentially use the sites dominated by Ambrosia scabra (microhabitat 1). Their residency at those sites would present nutritional advantages due to higher availability of seeds. This species begins to use other microhabitats more frequently only after the population peak. O. delticola preferentially uses the sites dominated by Lonicera japónica-Baccharis spicata (microhabitat 3). As both species present similarities in their diets, the differential use of the grassland microhabitat would contributate to diminish competitive interactions between them. O. rutilans reproductive individuals do not show preference for either microhabitat. During autumn-winter, non-reproductive individuals are more frequently captured in microhabitat 1. The important diminution herbaceous cover among Cortaderia selloana bushes (microhabitat 2) and under the dominant shrubs of microhabitat 3, led as to think that prédation could be an important factor regarding the habitat use pattern of A. azarae and O. rutilans during autumn and winter. The climbing ability of O. delticola would contribute to diminish the impact of prédation it could suffer at microhabitat 3. rabies, la fréquentation par chacune de microhabitats différents dans la prairie peut contribuer à diminuer la compétition entre elles. O. rutilans en période de reproduction ne montre pas de préférence pour Tun ou l'autre microhabitat. En automne et-hiver, les individus non reproducteurs sont plus fréquemment capturés dans le microhabitat 1. Une importante réduction du couvert herbacé entre les buissons de Cortaderia selloana (microhabitat 2) et sous les plantes dominantes du microhabitat 3, conduit à penser que la prédation peut être un facteur important d'utilisation de l'habitat d'A. azarae et de O. rutilans en automne et en hiver. L'aptitude au grimper que présente O. deificola doit contribuer à diminuer l'impact de la prédation dont il doit souffrir dans le microhabitat 3. © 1991, Walter de Gruyter. All rights reserved.

Registro:

Documento: Artículo
Título:Habitat selection in population of cricetine rodents in the region delta (argentina)
Autor:Bonaventura, S.M.; Piantanida, M.J.; Gurini, L.; Sanchez Lopez, M.I.
Filiación:Dto de Biología, Fac. de Cs. Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, Piso 4to., 1428 Buenos Aires, Argentina
Mus. Arg. de Cs. Nat., « Bernardino Rivadavia », Angel Gallardo 470, 1405, Buenos Aires, Argentina
Estación Experimental Agropecuaria Delta (INTA), CC 14, 2804, Campana, Argentina
Palabras clave:grassland; habitat selection; rodent; Argentina, Delta; Akodon azarae; Ambrosia scabra; Baccharis spicata; Cortaderia selloana; Lonicera japonica; Oryzomys delticola; Oxymycterus rutilans
Año:1991
Volumen:55
Número:3
Página de inicio:339
Página de fin:354
DOI: http://dx.doi.org/10.1515/mamm.1991.55.3.339
Título revista:Mammalia
Título revista abreviado:Mammalia
ISSN:00251461
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v55_n3_p339_Bonaventura

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Citas:

---------- APA ----------
Bonaventura, S.M., Piantanida, M.J., Gurini, L. & Sanchez Lopez, M.I. (1991) . Habitat selection in population of cricetine rodents in the region delta (argentina). Mammalia, 55(3), 339-354.
http://dx.doi.org/10.1515/mamm.1991.55.3.339
---------- CHICAGO ----------
Bonaventura, S.M., Piantanida, M.J., Gurini, L., Sanchez Lopez, M.I. "Habitat selection in population of cricetine rodents in the region delta (argentina)" . Mammalia 55, no. 3 (1991) : 339-354.
http://dx.doi.org/10.1515/mamm.1991.55.3.339
---------- MLA ----------
Bonaventura, S.M., Piantanida, M.J., Gurini, L., Sanchez Lopez, M.I. "Habitat selection in population of cricetine rodents in the region delta (argentina)" . Mammalia, vol. 55, no. 3, 1991, pp. 339-354.
http://dx.doi.org/10.1515/mamm.1991.55.3.339
---------- VANCOUVER ----------
Bonaventura, S.M., Piantanida, M.J., Gurini, L., Sanchez Lopez, M.I. Habitat selection in population of cricetine rodents in the region delta (argentina). Mammalia. 1991;55(3):339-354.
http://dx.doi.org/10.1515/mamm.1991.55.3.339