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Distribuição e diversidade de espécies do gênero Biomphalaria em microrregiões localizadas no Médio Paranapanema, São Paulo, SP, Brasil Biota Neotropica
Tuan,Roseli.
Foram estudadas a diversidade e a abundância de espécies do gênero Biomphalaria em córregos próximos aos Rios Paranapanema e Pardo (São Paulo, SP, Brasil), em locais antigamente associados à transmissão do Schistosoma mansoni, sujeitos ainda a drásticas variações na disponibilidade de água. Os dados confirmam a predominância de Biomphalaria glabrata (Say, 1818) em córregos do município de Ourinhos, localizados nas margens do Rio Pardo e do Rio Paranapanema. Em Ipauçu, distante 30 km de Ourinhos, a predominância de Biomphalaria tenagophila (Orbigny, 1835) é acompanhada da ausência de B. glabrata. Foram estimados os índices de Diversidade e Dominância de Simpson, que evidenciam uma distribuição variada, provavelmente associada com o substrato aquático onde...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomphalaria; Diversidade; Distribuição; Esquistossomose.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000100031
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The current distribution pattern of Biomphalaria tenagophila and Biomphalaria straminea in the northern and southern regions of the coastal fluvial plain in the state of São Paulo Biota Neotropica
Palasio,Raquel Gardini Sanches; Casotti,Marcia Oliveira; Rodrigues,Thamiris Cassia; Menezes,Regiane Maria Tirone; Zanotti-Magalhaes,Eliana Maria; Tuan,Roseli.
We analyze the current distribution of snails from genus Biomphalaria in the north and south of the coastal fluvial plain in the state of São Paulo, which is part of a large coastal floodplain. Data from twenty-nine collection sites confirmed that the freshwater body in both regions is colonized by Biomphalaria tenagophila and Biomphalaria straminea, which are natural intermediate hosts of Schistosoma mansoni. The abundance of B. straminea in collection sites where only B. tenagophila had previously been recorded indicates the potential for B. straminea to expand in the region. While quantitative analysis of the number of specimens per species showed that local growth of B. tenagophila populations occurs during periods with little rainfall, there is a...
Tipo: Info:eu-repo/semantics/report Palavras-chave: B. tenagophila; B. straminea; Schistosomiasis; Climate change.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000300401
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Diversity of Biomphalaria spp. freshwater snails and associated mollusks in areas with schistosomiasis risk, using molecular and spatial analysis tools Biota Neotropica
Palasio,Raquel Gardini Sanches; Xavier,Iara Giordano; Chiaravalotti-Neto,Francisco; Tuan,Roseli.
Abstract: The Middle Paranapanema River region of São Paulo, Brazil is home to significant diversity of Biomphalaria species and is very vulnerable to health and environmental impacts such as schistosomiasis. This study updates freshwater malacological surveys for ecosystems in one portion of the Middle Paranapanema River Basin, with emphasis on the genus Biomphalaria. Snails were collected from 114 distinct bodies of water between 2015 and 2018. Biomphalaria specimens were identified according to morphological and molecular characteristics, while animals in other genera (Drepanotrema, Lymnaea, Melanoides, Physa and Pomacea) were identified solely according to shell characteristics. A geographic information system was used to update intermediate host...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomphalaria; Freshwater snails; Biodiversity; DNA barcode; Distribution.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000400206
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ITS2 variability of Biomphalaria (Mollusca, Planorbidae) species from the Paranapanema Valley (São Paulo State, Brazil): diversity patterns, population structure, and phylogenetic relationships Genet. Mol. Biol.
Tuan,Roseli; Santos,Priscila dos.
The ribosomal DNA internal transcribed spacer 2 (ITS2) has been shown to be a useful genetic marker for species identification and phylogenetic reconstruction in the genus of freshwater snails Biomphalaria (Preston 1910). Additionally, ITS2 studies in Biomphalaria have uncovered significant intra-specific genetic variability suggesting the presence of cryptic species complexes. We obtained ITS2 sequences for the Biomphalaria species B. glabrata, B. tenagophila, B. occidentalis and B. peregrina from the Paranapanema Valley (São Paulo State, Brazil) and compared them with a comprehensive set of published Biomphalaria ITS2 sequences using Bayesian inference of phylogeny. Analysis of the resulting trees showed that the newly obtained B. glabrata sequences did...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bayesian inference; Biomphalaria; DNA sequences; Internal transcribed spacer 2 (ITS2); Ribosomal DNA.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100024
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Effect of self-fertilization on Biomphalaria tenagophila (Orbigny, 1835) (Pulmonata: Planorbidae) Genet. Mol. Biol.
Tuan,Roseli; Simões,Luiz Carlos Gomes.
Biomphalaria tenagophila is a simultaneous hermaphrodite freshwater snail, which can breed by self and cross-fertilization. It is, therefore, well suited for studying reproduction as an evolutive strategy. Several characteristics (shell size and age at sexual maturity, egg fecundity and fertility) were analyzed in four consecutive self-fertilized generations and compared to cross-fertilized individuals. The reproductive parameters were similar in the two groups. Shell size was significantly greater in the fourth self-fertilized generation than in the cross-fertilized individuals.
Tipo: Info:eu-repo/semantics/article
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571998000400012
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