Estudo de fauna helmintológica de pequenos mamíferos não voadores dos domínios fitogeográficos da amazônia, pantanal e cerrado

• Autor(a) principal: Freitas, Leodil da Costa
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFMT
• Texto Completo: http://ri.ufmt.br/handle/1/4226
• topic: Roedores; Marsupiais; Fauna helmintológica; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA; Rodents; Marsupials; Helminth fauna

Parasitism alone is an ecological interaction of two species in which the parasite is benefited and the host impaired in the interaction. For a long time the parasitic organisms of wild animals have been studied both in the context of animal health, as well as, not of public health. Important field of research includes the survey of parasites with lower economic impact, whose work is focused on the ecological and evolutionary consequences of the host / parasite interactions and the corresponding taxonomic descriptions. Thus, this study was performed by analyzing samples of small non-flying mammals (rodents and marsupials) in three Brazilian geographic domains: Pantanal (municipality of Poconé), which is one of the richest lands of the world in terms of the abundance and diversity of fauna. Amazonian geographical area (municipalities of Alta Floresta, Cláudia, Cotriguaçu in the State of Mato Grosso and municipality of Porto Grande in Amapá). Of great world importance it has a great diversity in the fauna of vertebrates and invertebrates, being that in the tropical forests the small mammals play an important non-equilibrium of the ecosystem. Cerrado geography is the most representative open domain in South America, both in terms of area, covering about two million km2 , and from the scientific point of view, which remains one of the least studied Brazilian domains. After the capture of the animals, the contents of the alimentary canal (esophagus, stomach and intestines) were washed individually, filtered in 0.15 mm sieves and examined under a 10X objective stereoscopic microscope. In the Amazonian phytogeographic domain, 77 specimens of small terrestrial mammals were collected in the municipalities of the State of Mato Grosso, and another 32 specimens of Makalata didelphoides in the state of Amapá. A frequency of 41.55% (32/77) animals positive for helminths of the animals was observed, as well as 37.5% (12/32) for M. didelphoides. Samples were collected from 64 rodent and marsupial specimens, totaling 12 different species in the Pantanal, with a frequency of 90.62% (58/64) positive for less than one species of helminth. Of the specimens collected in the cerrado, a frequency of 66.6% (4/6) positive animals was observed. The low parasite load of M. didelphoides suggests to be associated with the homogeneity of the tree niche and foliage feeding. The nematode species richness was considerably higher in relation to other helminths, 9.41% (8/85) positive samples are not nematodes, and 90.58% (77/85) are parasitic nematodes.