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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.17 no.1 Curitiba Mar. 2000 

Land fauna composition of small mammals of a fragment of Atlantic Forest in the State of Sao Paulo, Brazil



Darci Moraes Barros-BattestiI; Rosana MartinsI; Carlos Roberto BertimI; Natalino Hajime YoshinariII; Virginia L.N. BonoldiII; Elaine P. LeonII; Michel MiretzkiIII; Teresinha T.S. SchumakerIV

ILaboratório de Artrópodes, Instituto Butantan. Avenida Vital Brazil 1500, 05503-900 São Paulo, São Paulo, Brasil. E-mail:
IIDepartamento de Clínica Médica, Faculdade de Medicina, Universidade de São Paulo. Avenida Dr. Arnaldo 455, 01246-903, São Paulo, São Paulo, Brasil
IIISeção de Mastozoologia, Museu de História Natural Capão da Imbuia, Prefeitura Municipal de Curitiba. Rua Benedito Conceição 407, 82810-080, Curitiba, Paraná, Brasil E-mail:
IVDepartamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo. Avenida Lineu Prestes 1374, 05508-900 São Paulo, São Paulo, Brasil




The Atlantic Forest small mammal land fauna, except bats, and the abiotic factors that might have an influence on its composition, were studied in the Itapevi County, State of Sao Paulo, a forested region, partly altered by antropic action, from January, 1995 to June, 1996. The trapping effort consisted of 2,888 trap-nights, resulting in a 4.6% trapping success and consisted of monthly trappings, for five consecutive days. During this period, 134 specimens were captured, of which 46.3% were Didelphimorphia and 53.7% were Rodentia. Eleven species were registered: two Didelphimorphia: Didelphis marsupialis (Linnaeus, 1758) and Marmosops incanus (Lund, 1841), and nine Rodentia: Akodon cursor (Winge, 1887), Bolomys lasiurus (Lund, 1841), Oxymycterus hispidus Pictet, 1843, Oxymycterus nasutus (Waterhouse, 1837), Oligoryzomys nigripes (Olfers, 1818), Oryzomys angouya (Fischer, 1814), Raltus norvegicus (Berkenhout, 1769), Euryzygomatomys spinosus (G. Fischer, 1814) and Cavia aperea Erxleben, 1777. The relative density indices were correlated with meteorological data by Spearman and Pearson coefficients. For marsupials these correlations were not significant. For rodents, the correlations were significant and directly related to lower temperature and rainfall indices (p<0.05). During the dry season the occurrence of small mammals was 50% greater than during the wet season, probably due to foraging strategies in the studied fragment of Atlantic Forest.

Key words: Small mammals, marsupial, rodent, Atlantic Forest



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ACKNOWLEDGEMENTS. This work was supported, in part, by the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq). We thank Dr. Paulo De Marco Jr., Ecology Section of the Biology Department of the Universidade Federal de Vicosa, Minas Gerais, for the review of an earlier version of this manuscript; Mr. Marcos Moraes Silva, president of the Associacao dos Amigos de Transurb, for collection opportunity, and Mr. Luiz Pereira da Silva, technician of the Instituto de Ciencias Biomedicas - Universidade de Sao Paulo, for helping us in the field work.



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Recebido em 22. I. 1999; aceito em 22. II. 2000.

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