Characteristics of dispersing pampean grassland mice (Akodon azarae) in agroecosystems of central Argentina
We studied the characteristics of dispersing Akodon azarae in agroecosystems of central Argentina. The landscape of the study area consists of cropfields surrounded by weedy margins, which provide good quality habitat for A. azarae. We sampled six times between June 1991 and May 1993. We defined a c...
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2002
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| LEADER | 11280caa a22009377a 4500 | ||
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| 003 | AR-BaUEN | ||
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| 100 | 1 | |a Cittadino, E.A. | |
| 245 | 1 | 0 | |a Characteristics of dispersing pampean grassland mice (Akodon azarae) in agroecosystems of central Argentina |
| 260 | |c 2002 | ||
| 270 | 1 | 0 | |m Cittadino, E.A.; Departamento de Ciencias Biologicas, Facul. de Cie. Exactas y Naturales, Universidad de Buenos Aires, pabellón II, 4 piso, (C1428EHA) Buenos Aires, Argentina; email: eac@bg.fcen.uba.ar |
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| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a We studied the characteristics of dispersing Akodon azarae in agroecosystems of central Argentina. The landscape of the study area consists of cropfields surrounded by weedy margins, which provide good quality habitat for A. azarae. We sampled six times between June 1991 and May 1993. We defined a central area (center) where all A. azarae were removed, while capture-mark-release trapping was conducted in the adjacent areas (laterals). Individuals were characterized as residents if they did not change their home range between trapping sessions, or colonizing dispersers if they changed their home range and colonized the centers. We compared dispersers and residents with respect to sex ratio, proportion of reproductively active individuals, body length and weight. In general, residents were larger than dispersers but they did not differ with respect to reproductive activity and sex ratio. Differences were greater for females in the reproductive period and for males in the nonreproductive period, suggesting that during reproductive period smaller females of lower competitive ability may disperse to obtain a territory and reproduce, while male dispersal in the nonreproductive period would be non adaptive because the smaller male dispersers have low chance of survival in an impoverished habitat with high rodent density. |l eng | |
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas | ||
| 536 | |a Detalles de la financiación: Universidad de Buenos Aires | ||
| 536 | |a Detalles de la financiación: We acknowledge the assistance in the field work of our team mates and the Diego Gaynor residents. Research was supported by grants from the Consejo Nacional de Investiga-ciones Científicas y Técnicas as well as from the Universidad de Buenos Aires. | ||
| 593 | |a Departamento de Ciencias Biologicas, Facul. de Cie. Exactas y Naturales, Universidad de Buenos Aires, pabellón II, 4 piso, (C1428EHA) Buenos Aires, Argentina | ||
| 651 | 4 | |a ARGENTINA | |
| 690 | 1 | 0 | |a AGROECOSYSTEMS |
| 690 | 1 | 0 | |a AKODON AZARAE |
| 690 | 1 | 0 | |a DISPERSAL |
| 690 | 1 | 0 | |a RODENTS |
| 690 | 1 | 0 | |a AKODON |
| 690 | 1 | 0 | |a AKODON AZARAE |
| 690 | 1 | 0 | |a RODENTIA |
| 700 | 1 | |a Bilenca, David Norberto | |
| 700 | 1 | |a Busch, M. | |
| 700 | 1 | |a Kravetz, F.O. | |
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