Latitudinal variation in litter size and length of the breeding season in populations of Pampas Mice, Akodon azarae

This research was conducted to examine litter size and length of the breeding season with respect to latitude in seven populations of the murid rodent Akodon azarae inhabiting the pampas of central Argentina. Both the length of the breeding season and the mean litter size of A. azarae showed signifi...

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Autores principales: Bilenca, David Norberto, Zuleta, Gustavo A., Kravetz, Fernando O.
Publicado: 1994
Materias:
Akodon azarae
breeding season
latitudinal gradient
litter size
Pampas mouse
Argentina, Pampa
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v58_n4_p563_Bilenca
http://hdl.handle.net/20.500.12110/paper_00251461_v58_n4_p563_Bilenca
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00251461_v58_n4_p563_Bilenca
record_format dspace
spelling paper:paper_00251461_v58_n4_p563_Bilenca2023-06-08T14:52:37Z Latitudinal variation in litter size and length of the breeding season in populations of Pampas Mice, Akodon azarae Bilenca, David Norberto Zuleta, Gustavo A. Kravetz, Fernando O. Akodon azarae breeding season latitudinal gradient litter size Pampas mouse Argentina, Pampa This research was conducted to examine litter size and length of the breeding season with respect to latitude in seven populations of the murid rodent Akodon azarae inhabiting the pampas of central Argentina. Both the length of the breeding season and the mean litter size of A. azarae showed significant negative associations with latitude (P = 0.016 and P = 0.024, respectively). These findings do not support previous hypotheses of latitudinal increase of litter size that have been reported for small mammals inhabiting the Northern Hemisphere. Available evidence suggests that at higher latitudes there would be suboptimal conditions for reproduction of A. azarae, which may be brought about by a combination of harsher environmental conditions and lower availability of food, particularly insects. These features may impede the settlement and development of viable populations of Pampas mice beyond the southern limit of their distribution. © 1994, Walter de Gruyter. All rights reserved. Fil:Bilenca, D.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Zuleta, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Kravetz, F.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1994 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v58_n4_p563_Bilenca http://hdl.handle.net/20.500.12110/paper_00251461_v58_n4_p563_Bilenca
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Akodon azarae
breeding season
latitudinal gradient
litter size
Pampas mouse
Argentina, Pampa
spellingShingle Akodon azarae
breeding season
latitudinal gradient
litter size
Pampas mouse
Argentina, Pampa
Bilenca, David Norberto
Zuleta, Gustavo A.
Kravetz, Fernando O.
Latitudinal variation in litter size and length of the breeding season in populations of Pampas Mice, Akodon azarae
topic_facet Akodon azarae
breeding season
latitudinal gradient
litter size
Pampas mouse
Argentina, Pampa
description This research was conducted to examine litter size and length of the breeding season with respect to latitude in seven populations of the murid rodent Akodon azarae inhabiting the pampas of central Argentina. Both the length of the breeding season and the mean litter size of A. azarae showed significant negative associations with latitude (P = 0.016 and P = 0.024, respectively). These findings do not support previous hypotheses of latitudinal increase of litter size that have been reported for small mammals inhabiting the Northern Hemisphere. Available evidence suggests that at higher latitudes there would be suboptimal conditions for reproduction of A. azarae, which may be brought about by a combination of harsher environmental conditions and lower availability of food, particularly insects. These features may impede the settlement and development of viable populations of Pampas mice beyond the southern limit of their distribution. © 1994, Walter de Gruyter. All rights reserved.
author Bilenca, David Norberto
Zuleta, Gustavo A.
Kravetz, Fernando O.
author_facet Bilenca, David Norberto
Zuleta, Gustavo A.
Kravetz, Fernando O.
author_sort Bilenca, David Norberto
title Latitudinal variation in litter size and length of the breeding season in populations of Pampas Mice, Akodon azarae
title_short Latitudinal variation in litter size and length of the breeding season in populations of Pampas Mice, Akodon azarae
title_full Latitudinal variation in litter size and length of the breeding season in populations of Pampas Mice, Akodon azarae
title_fullStr Latitudinal variation in litter size and length of the breeding season in populations of Pampas Mice, Akodon azarae
title_full_unstemmed Latitudinal variation in litter size and length of the breeding season in populations of Pampas Mice, Akodon azarae
title_sort latitudinal variation in litter size and length of the breeding season in populations of pampas mice, akodon azarae
publishDate 1994
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v58_n4_p563_Bilenca
http://hdl.handle.net/20.500.12110/paper_00251461_v58_n4_p563_Bilenca
work_keys_str_mv AT bilencadavidnorberto latitudinalvariationinlittersizeandlengthofthebreedingseasoninpopulationsofpampasmiceakodonazarae
AT zuletagustavoa latitudinalvariationinlittersizeandlengthofthebreedingseasoninpopulationsofpampasmiceakodonazarae
AT kravetzfernandoo latitudinalvariationinlittersizeandlengthofthebreedingseasoninpopulationsofpampasmiceakodonazarae
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