Literaturdatenbank
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Pearse, D. E., Cantarelli, V. H., Ackerman, R. A., & Sites, J. W. (2003). Population and conservation genetics of the giant amazon river turtle, podocnemis expansa. Abstracts ASIH Meeting 2003.
Added by: Admin (14 Aug 2008 20:36:26 UTC) |
| Resource type: Journal Article BibTeX citation key: Pearse2003 View all bibliographic details  |
Categories: General Keywords: Genetik = genetics, Habitat = habitat, Podocnemididae, Podocnemis, Podocnemis expansa, Schildkröten = turtles + tortoises, Südamerika = South America Creators: Ackerman, Cantarelli, Pearse, Sites Collection: Abstracts ASIH Meeting 2003 |
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| Abstract |
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The Giant Amazon River Turtle, Podocnemis expansa, like marine turtles, is a large, colonially nesting species that may migrate long distances between nesting and feeding grounds. In the past 100 years, populations of P. expansa have been severely reduced by hunting. Few data are available on the movement or ecology of this species outside of the nesting season, so knowledge of the demographic and evolutionary independence of disjunct populations is lacking. Here we present an analysis of microsatellite DNA data on population differentiation throughout its Amazonian range and the Orinoco River in Venezuela. Data on genetic differentiation across this broad geographic range is compared with previous studies detailing genetic structure of P. expansa at much finer scales (within individual river basins). In addition we address the issue of inter-basin connectivity via an unusual waterway, the Brazo Casiquiare.
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