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1 May 2005 Nest Placement of the Giant Amazon River Turtle, Podocnemis expansa, in the Araguaia River, Goiás State, Brazil
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Abstract
The giant Amazon river turtle (Podocnemis expansa) nests on extensive sand bars on the margins and interior of the channel during the dry season. The high concentration of nests in specific points of certain beaches indicates that the selection of nest placement is not random but is related to some geological aspects, such as bar margin inclination and presence of a high, sandy platform. The presence of access channels to high platform points or ramp morphology are decisive factors in the choice of nesting areas. The eroded and escarped margins of the beaches hinder the Amazon river turtle arriving at the most suitable places for nesting. Through the years, changes in beach morphology can alter nest distribution.
Paulo Dias Ferreira Júnior and Paulo de Tarso Amorim Castro "Nest Placement of the Giant Amazon River Turtle, Podocnemis expansa, in the Araguaia River, Goiás State, Brazil," AMBIO: A Journal of the Human Environment 34(3), (1 May 2005). https://doi.org/10.1579/0044-7447-34.3.212
Received: 30 September 2002; Accepted: 1 January 2004; Published: 1 May 2005
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