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Iheringia. Série Zoologia

versión impresa ISSN 0073-4721

Resumen

ABBA, Agustín M.; CASSINI, Guillermo H.  y  GALLIARI, Fernando C.. New contributions to the natural history of the southern long-nosed armadillo Dasypus hybridus (Mammalia, Dasypodidae). Iheringia, Sér. Zool. [online]. 2011, vol.101, n.4, pp. 325-335. ISSN 0073-4721.  http://dx.doi.org/10.1590/S0073-47212011000300007.

This contribution presents new data about the natural history of the Dasypus hybridus (Desmarest, 1804) (Mammalia, Xenarthra, Dasypodidae). A seasonal monitoring using the capture and release method was performed over the course of three years in a 100 ha of four cattle farms in the Buenos Aires province, Argentina. Data were collected on food habits, space and time use, behavior, thermoregulation, population data, and morphology. A total of 71 captures were made. The main food items recorded were plant matter, ants and coleopterans, and did not occur seasonal differences in food habits. Dasypus hybridus concentred their activities during daytime, and were recorded a low frequency of activities during cold seasons (fall and winter). The long-nosed armadillo prefer humid soils and grasslands with high vegetation cover, and selected forest to refuge. The southern long-nosed armadillo were asocial. Rectal temperature was positively correlated with environmental temperature. The sex proportion was near to one, and no sexual dimorphism was observed. In general, the results of this study are in agreement with previous observations of other species of the same genera, but is necessary to highlight the trend observed in food habits and thermoregulatory strategy. This work provides new information about different aspects of a poor studied species that occur in a habitat subjected to high pressure to modification and use.

Palabras llave : Armadillos, Argentina; Cingulata; conservation; ecology.

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