Ecologia e historia natural de tatus do cerrado de Itirapina, São Paulo (Xenarthra : Dasypodidae)

AUTOR(ES)

Vinicius Bonato

DATA DE PUBLICAÇÃO

2002

RESUMO

Armadillos of the family Dasypodidae are the most diverse in number of species, geographic range and feeding habits amongst the order Xenarthra. Knowledge of the natural history and population ecology for armadillos is derived primarily from work conducted with Dasypus novemdnctus in the U .S.A. The present study was carried out at the Estação Ecológica de Itirapina, São Paulo, which includes three Cerrado vegetation types: campo sujo, campo cerrado e mata de galeria. In the area studied four species of armadillos occur, Cabassous unicinctus, D. novemdnctus, D. septemcínctus and Euphractus sexdnctus. The aims of this project were to study the occurrence of these species in each of vegetation types, food items consumed throughout the year, temporal activity patterns, age structure, sex ratio, and also to estimate population size of two species, C unicinctus and E sexcínctus. Individual armadillos were trapped with pitfall traps with drift fence, capture by hand or sighted. Cabassous unidnctus and E sexdnctus occurred in proportion greater than expected in campo cerrado and mata de galeria vegetation types. Invertebrates were the most frequent item consumed by C unicinctus, E sexcínctus, and D. septemcínctus. Vertebrates were consumed only by E sexdnctus. Plant material was consumed by C unicínctus and E sexdnctus. Cabassous unicinctus has a more specialized diet than E sexcinctus. Cabassous unicinctus were active during the day whereas E sexcinctus were active during the night and day. Sex ratio in C unidnctus was not biased for either sex. In E sexcínctus males were more frequent than females. Most armadillos captured were adults in all four species. Size population estimates for C unicinctuswas 133 individuals (S.E. = 19.79) and for E sexcinctuswas 68 individuals (S.E. = 14.77) in the study area (500 ha)

ASSUNTO(S)

historia natural ecologia cerrados

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