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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/8236

Title: Habitat preference of freshwater snails in relation to environmental factors and the presence of the competitor snail Melanoides tuberculatus (Müller, 1774)
Authors: Giovanelli, Alexandre
Coelho da Silva, Cesar Luiz Pinto Ayres
Leal, Geórgia Borges Eccard
Baptista, Darcílio Fernandes
Keywords: Melanoides tuberculatus - Melanoides tuberculata - Biomphalaria - habitat preference - schistosomiasis - competition
Issue Date: 31-Dec-2005
Publisher: Fundação Oswaldo Cruz, Fiocruz
Citation: Memórias do Instituto Oswaldo Cruz (ISSN: 1678-8060) Vol 100 Num 2
Abstract: Our objective is to evaluate the habitat preference of freshwater snails in relation to environmental factors and the presence of the competitor snail Melanoides tuberculatus . In the first phase, snails was collected at 12 sites. This sampling sites presented a degree of organic input. In the second phase 33 sampling sites were chosen, covering a variety of lotic and lentic environments. The snail species found at Guapimirim, state of Rio de Janeiro, displayed a marked habitat preference, specially in relation to the physical characteristics of each environment. Other limiting factors for snail distribution at the studied lotic environments were the water current velocity and the amount of organic matter, mainly to Physa marmorata , M. tuberculatus, and Biomphalaria tenagophila . The absence of interactions between M. tuberculatus, and another snails could be associated to the distinct spatial distribution of those species and the instability of habitats. This later factor may favor the coexistence of M. tuberculatus with B. glabrata by reduction of population density. In areas of schistosomiasis transmission some habitat modification may add to the instability of the environment, which would make room for the coexistence of M. tuberculatus, and Biomphalaria spp. In this way, some of the usual measures for the control of snail hosts would prevent the extinction of populations of Biomphalaria spp. by M. tuberculatus in particular habitats.
URI: http://hdl.handle.net/1807/8236
Other Identifiers: http://www.bioline.org.br/abstract?id=oc05065
Rights: Copyright 2005 - Instituto Oswaldo Cruz - Fiocruz.
Appears in Collections:Bioline International Legacy Collection

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