The Effect of Temperature and Digestion on Metabolism in Black Rat Snakes, Elaphe Obsoleta Obsoleta

Temperature is critical to the understanding of snake energetics due to the strong thermal dependencies of metabolism. To identify sources of metabolic variation in Elaphe obsoleta obsoleta, I investigated the effects of mass, body temperature, and digestion on oxygen consumption at 20, 25, and 30°C. Mass-specific standard metabolic rates (SMR) for rat snakes increased as a function of temperature. SMR did not change due to time of day effects. Slopes for 20 and 30°C treatments did not significantly differ. There was not a significant difference in O₂ consumption from 20 to 25°C. There was a significant difference in preferred temperature range of rat snakes. Digestive efficiency ranged from 25.6-75.7%. The mean metabolic rate during digestion was approximately four times as high as the mean SMR for relative meal sizes of 8-16% at 25°C. The amount of energy from the meal needed for oxygen consumption was 42.2 ± 1.42%. SMR of E. o. obsoleta resemble values for general snake equations. Preferred temperature range (23.3-33.1°C) is similar compared to northern populations, and thermal sensitivity (Q₁₀) is within the normal range for snakes (2-3).

Name thesis:degree_name

Master of Science in Biology

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Biology

Year

2004

Author dc:creator

• Brennan, April M.

Contributors dc:contributor

• Brian Greene

• metabolism
• temperature
• digestion
• rat snake
• Elaphe o. obsoleta
• Biology

Statement dc:rights

• © April M. Brennan

Repository record dc:identifier

https://bearworks.missouristate.edu/theses/1222

OAI identifier oai:identifier

oai:bearworks.missouristate.edu:theses-2223