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1 May 2006 Thermal Environment Characteristics of Podocnemis expansa and Podocnemis unifilis Nesting Areas on the Javaés River, Tocantins, Brazil
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Abstract

Subsurface temperature variation suggests that the thermal environment of giant Amazon river turtle (Podocnemis expansa) nests is influenced by the proximity of the water table and by the nest depth. The difference between vertical temperature gradients along fluvial beaches indicates that nest placement can exert a significant influence on substrate temperature. Temperatures decrease significantly with depth where P. expansa nest on the beach, but do not change with depth in lower beach areas where P. unifilis nest. Daily temperature variation decreases with depth along the entire beach.

Paulo Dias Ferreira Júnior and Paulo de Tarso Amorim Castro "Thermal Environment Characteristics of Podocnemis expansa and Podocnemis unifilis Nesting Areas on the Javaés River, Tocantins, Brazil," Chelonian Conservation and Biology 5(1), 102-107, (1 May 2006). https://doi.org/10.2744/1071-8443(2006)5[102:TECOPE]2.0.CO;2
Received: 27 December 2002; Accepted: 1 December 2004; Published: 1 May 2006
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