Literaturdatenbank
Literaturdatenbank |
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de Souza, F. L., & Abe, A. S. (2001). Population structure and reproductive aspects of the freshwater turtle, phrynops geoffroanus, inhabiting an urban river in southeastern brazil. Studies on Neotropical Fauna and Environment, 36(1), 57–62.
Added by: Admin (14 Aug 2008 22:46:55 UTC) |
| Resource type: Journal Article BibTeX citation key: Souza2001 View all bibliographic details  |
Categories: General Keywords: Chelidae, Fortpflanzung = reproduction, Habitat = habitat, Mesoclemmys, Phrynops, Phrynops geoffroanus, Schildkröten = turtles + tortoises, Südamerika = South America Creators: Abe, de Souza Collection: Studies on Neotropical Fauna and Environment |
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| Abstract |
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The population structure and reproductive aspects of Phrynops geoffroanus (Chelidae) in an urban river at Ribeirao Preto city, Sao Paulo state, southeastern Brazil, was studied by monthly captures and census during May 1997 to October 1998. A total of 247 turtles were sampled, 53 of them juveniles. Sex ratio was variable but never significantly different from 1 : 1. Captured turtles varied throughout the months but census indicated higher activity of turtles in spring, positively correlated to high air temperatures and negatively with rainfall. X-ray analysis of females revealed clutch sizes ranging between 8-20 and suggested that nesting occurred from February to August. Egg and clutch sizes were strongly correlated to female body size.
Added by: Admin |