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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.4 no.2 Curitiba  1987

http://dx.doi.org/10.1590/S0101-81751987000200007 

Mamíferos da Fazenda Nhumirim, sub-região de Nhecolândia, Pantanal do Mato Grosso do Sul. I - Levantamento preliminar de espécies*

 

 

Cleber J.R. AlhoI; Thomas E. Lacher, Jr.II; Zilca M.S. CamposIII; Humberto C. GonçalvesIII

ICentro de Pesquisa Agropecuária do Pantanal e Departamento de Biologia Animal da Universidade de Brasília, 70.910 Brasília, D.F. Brasil
IIHuxley College of Environmental Studies, Western Washington University, Bellingham, WA, 98255 E.E.U.U
IIIInstituto de Preservação e Controle Ambiental do Estado do Mato Grosso do Sul, Brasil

 

 


ABSTRACT

The pantanal is one of the world's richest freshwater wetlands. The pantanal is located in the flood plain of the headwaters of the Paraguai river, covering 140,000km2. The habitats of the Pantanal are present in a complex mosaic. The major habitat types are: pockets of forests, called capão or cordilheira, seasonally flooded grasslands or campos, and permanent or temporary lagoons, called baías. The Pantanal harbors both rich and abundant mammal fauna. A survey was conducted at Fazenda Nhumirim, a research station run by the Centro de Pesquisa Agropecuária do Pantanal (CPAP) in Corumbá, a research branch of EMBRAPA. The Fazenda covers an area of 4,310 ha in the sub-region of Nhecolândia, appoximately 150km east of Corumbá, Mato Grosso do Sul. The area receives an average annual rainfall of 1,022mm, and has a mean monthly temperature that varies between 29.1ºC (January) and 22.0ºC (June). Four routes were followed between two times during ten days of each month. The survey routes were covered on horseback by between two and four observers. Each route was followed and equal number of times in the morning and in the afternoon, to eliminate bias related to the activity patterns of mammals. In order to evaluate relative abundance of nocturnal species, we also conducted a number of nocturnal censuses. These censuses were done by car; a high intensity searchlight was used to spot the animals. We also conducted a trap-mark-recapture survey of the small mammals at Fazenda Nhumirim. After the census period, we continued to collect observations on the occurrence of mammals at the Fazenda, noting wherever possible the kind of habitat in which the animals were observed. The survey identified a diversity of mammals at Fazenda Nhumirim: six orders, 14 families, 19 genera, and 20 species. Nasua nasua was the most frequently observed species during the diurnal census, accounting for 61.5 percent of all observations. Dusicyon (formely Cerdocyon) thous was the most frequently observed species on the nocturnal census (39.13%). The small mammal community of Fazenda Nhumirim is composed of seven species: one marsupial, four cricetine rodents and two echimyid rodents.


 

 

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AGRADECIMENTOS

Os autores agradecem a Araê Book e a Kazuyoshi Ofugi as facilidades criadas para tornar este trabalho possível no CPAP. Muitas pessoas na Fazenda Nhumirim participaram entusiasticamente dos trabalhos de campo, quer seguindo as rotas de censo, quer ajudando a armar as armadilhas, entre estes Eleutério P. Santos, Nauílio A. Costa e Ernande Ravaglia. A OEA concedeu ajuda em nome de um dos autores (Dr. Alho) que tornou possível a participação de T. Lacher Jr. O CNPq também concedeu ajuda à pesquisa. Lacher Jr. agradece o apoio logístico do Bureau for Faculty Research da Western Washington University. Gonçalves e Campos tiveram apoio do Instituto de Preservação Ambiental - INAM-SEMA, do Mato Grosso do Sul.

 

REFERÊNCIAS

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* Trabalho conduzido na Fazenda Nhumirim, Centro de Pesquisa Agropecuária do Pantanal, EMBRAPA, com auxílio da OEA - Organização dos Estados Americanos, através do CNPq, fornecido ao Dr. Cleber J.R. Alho (Conta nº 03-85-528-517-BR-1)

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