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• Autor(a) principal: Bueno-Silva, Marlus
• Data de Publicação: 2005
• Outros Autores: Fischer, Marta Luciane
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Biotemas (Online)
• Texto Completo: https://periodicos.ufsc.br/index.php/biotemas/article/view/21419

Population dynamics of Drepanotrema cimex (Moricand, 1839) (Mollusca: Basommatophora: Planorbidae) in Barigüi Park, Curitiba City, State of Paraná, Brazil. The ecology of the freshwater snail Drepanotrema cimex (Moricand, 1839), an intermediate host of trematode larvae, is little known in Brazil. We analyzed the population dynamics of D. cimex in Barigüi Park, Curitiba, Brazil. Collections for the survey were realized at three sites that were at different distances from the Barigüi River and had distinct water plant species. In total, 278 snails were collected, and the highest sampling rate was where Paspalum sp. and Alternanthera philoxeroides (Mart.) Griseb. occurred. A higher occurrence of D. cimex in the autumn suggested that the adult stage culminates in this season, resulting from the previous rainy period that seems to support the reproduction of snails in the summer. However, the water temperature had no correlation with the total quantity of snails. The mean shell diameter did not show any correlation either with the water temperature or with the seasons. We recorded intraspecific variations in the color of the shells among the collections from the different sites.