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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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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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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 |
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Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571998000400012 |
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