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Abstract, Introduction, Methods, Results, Discussion, Literature Cited,…
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Basal metabolic rate is the rate of energy expenditure in animals at bodily rest. BMR can be measured in a number of ways, comparing the food that was consumed versus the food excreted, oxygen consumption, carbon dioxide production, as well as heat produced by the animal. (Hulbert et el 2004)
History of BMR and what it measures, as well as mass specific BMR. Introduce relationship of BMR in mammals, birds, and reptiles as the focus of the paper
If we know that body mass BMR has a positive correlation in warm blooded mammals and birds would ectotherms like turtles, snakes, and lizards have the same upwards trend for body mass BMR? Will reptiles display the same negative nonlinear trend?
If we know that the very different organisms that make up birds and mammals display a positive correlation for body mass BMR and a negative nonlinear correlation for mass-specific BMR, than reptiles should display the same correlation in both body Mass BMR and mass-specific BMR that mammals and birds display, regardless of internal temperature.
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66 birds, 297 mammals, and 10 reptiles
I used Quaardvark to gather data on the BMR and body mass in grams of mammals, birds, and terrestrial reptiles.I calculated mass specific BMR each species in each category. Using excel to form bar graphs and conduct t-tests we are able to compare the BMR of mammals birds and reptiles.
3 scatter plots, 1 for body mass and BMR for mammals, another for body mass and BMR in birds, and lastly body mass and BMR in reptiles.
Data from Quaardvark displaying body mass, BMR, and mass-specific BMR
The results of the experiment show that cold blooded reptiles display a positive linear correlation when looking at body mass and BMR, and a negative nonlinear correlation when looking at mass- specific BMR and body mass.
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Summarize findings, why the findings are important and discuss possible complications with the experiment, for example a small sample size for reptiles.
Despite heat being a key variable in metabolism and measuring BMR, cold blooded reptiles increase in BMR as body mass increases, and decreases in mass specific BMR as body mass increases. This is the same for both mammals and birds as well.
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Reptiles display a positive linear correlation regarding body mass and BMR, as well as a negative non linear correlation looking at body mass and mass- specific BMR. This is the same for mammals and birds as well.
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White CR, Kearney MR. 2012. Determinants of inter-specific variation in basal metabolic rate. Journal of Comparative Physiology B. 183(1):1–26
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Clarke, Andrew, Peter Rothery, and Nick J. B. Isaac. “Scaling of Basal Metabolic Rate with Body Mass and Temperature in Mammals.” Journal of Animal Ecology 79, no. 3 (2010): 610–19. http://www.jstor.org/stable/40605432.
Hulbert A J., Else P L. 2004. Basal Metabolic Rate: History, Composition, Regulation, and Usefulness. Physiological and Biochemical Zoology. 77(6):869–876
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