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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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01650521_v37_n1_p1_Cittadino http://hdl.handle.net/20.500.12110/paper_01650521_v37_n1_p1_Cittadino |
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paper:paper_01650521_v37_n1_p1_Cittadino2023-06-08T15:14:46Z Characteristics of dispersing pampean grassland mice (Akodon azarae) in agroecosystems of central Argentina Agroecosystems Akodon azarae Argentina Dispersal Rodents Akodon Akodon azarae Rodentia 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. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01650521_v37_n1_p1_Cittadino http://hdl.handle.net/20.500.12110/paper_01650521_v37_n1_p1_Cittadino |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Agroecosystems Akodon azarae Argentina Dispersal Rodents Akodon Akodon azarae Rodentia |
| spellingShingle |
Agroecosystems Akodon azarae Argentina Dispersal Rodents Akodon Akodon azarae Rodentia Characteristics of dispersing pampean grassland mice (Akodon azarae) in agroecosystems of central Argentina |
| topic_facet |
Agroecosystems Akodon azarae Argentina Dispersal Rodents Akodon Akodon azarae Rodentia |
| description |
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. |
| title |
Characteristics of dispersing pampean grassland mice (Akodon azarae) in agroecosystems of central Argentina |
| title_short |
Characteristics of dispersing pampean grassland mice (Akodon azarae) in agroecosystems of central Argentina |
| title_full |
Characteristics of dispersing pampean grassland mice (Akodon azarae) in agroecosystems of central Argentina |
| title_fullStr |
Characteristics of dispersing pampean grassland mice (Akodon azarae) in agroecosystems of central Argentina |
| title_full_unstemmed |
Characteristics of dispersing pampean grassland mice (Akodon azarae) in agroecosystems of central Argentina |
| title_sort |
characteristics of dispersing pampean grassland mice (akodon azarae) in agroecosystems of central argentina |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01650521_v37_n1_p1_Cittadino http://hdl.handle.net/20.500.12110/paper_01650521_v37_n1_p1_Cittadino |
| _version_ |
1768544952511365120 |