THE INFLUENCE OF TEMPERATURE ON THE FEEDING BEHAVIOR OF Peltocephalus dumerilianus (TESTUDINES PODOCNEMIDAE)
Journal Title: Revista MVZ Cordoba - Year 2009, Vol 14, Issue 1
Abstract
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 + 60ºC (± 0.1ºC). Temperatures were increased 0.25ºC every 10 minutes until reaching the selected temperature, which was then maintained for 60 minutes for each test. The temperatures selected for tests, were 26ºC, 30ºC, 34ºC, 38ºC, with an ambient temperature of 26.8ºC. We evaluated: feeding duration (in minutes), consumption (in volume), the time which turtles began agonistic behavior, and two characteristic displays: biting and disputes over food. Results. In general all parameters were significant, the higher the temperature the longer the time of ingestion; the lower the temperature the lower the consumption volume; the lower the temperature the greater the time to initiation of agonistic behavior, demonstrating an inverse relationship. Conclusions. There was a direct relationship between environmental temperature and feeding processes. Temperature was also related to basic aspects of behavior during agonistic displays.
Authors and Affiliations
Jaime De La Ossa V, Ph. D| Universidad de Sucre. Facultad de Ciencias Agropecuarias. Barrio Puerta Roja. Sincelejo, Sucre, Colombia,., Richard C. Vogt, Ph. D| INPA/BADPI. Av. André Araújo 2936 Campus II, Petrópolis 69083-970. Manaus, Amazonas, Brasil., Larissa Schneider, M. Sc| INPA/BADPI. Av. André Araújo 2936 Campus II, Petrópolis 69083-970. Manaus, Amazonas, Brasil., Alejandro De La Ossa L, Ecólogo| Universidad Javeriana, Bogotá, Colombia.
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