Objective: To analyze the feeding behavior of 50 Peltocephalus dumerilianus hatchlings (Testudines Podocnemididae) under different temperature conditions in laboratory. Materials and methods: The individuals for this experiment were obtained by incubation in the laboratory. They were divided randomly into 5 groups. Temperature trials were conducted for 2 months with 3 repetitions per week, using electric heaters. Temperatures were recorded continuously using a digital thermometer-10 to+ 60° C (±0.1° C)