Acta Theriologica

, Volume 48, Issue 3, pp 347–357 | Cite as

Body composition and gut length ofAkodon azarae (Muridae: Sigmodontinae): relationship with energetic requirements



Akodon azarae (J. Fischer, 1829) is a small omnivorous murid rodent that lives in environments with seasonal fluctuations of food. Seasonal variation in its body composition and gut length, in relation to reproductive status, was studied. Physical Condition Index (PCI) and body composition showed seasonal differences, however, there were no differences in intestine length. The PCI was higher for both mature males and reproductive females compared to immature males and non-reproductive females. Lipid, protein and ash content showed differences in relation to reproductive status. The results suggest thatA. azarae meets the additional costs of pregnancy and lactation by increasing energy intake, without relying on reserves.

Key words

Akodon azarae body composition gut plasticity rodent food energy 


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Copyright information

© Mammal Research Institute, Bialowieza, Poland 2003

Authors and Affiliations

  1. 1.Laboratorio Ecofisiología, Departamento BiologíaUniversidad Nacional de Mar del PlataMar del PlataArgentina

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