Observations


- age and lifespan tend to scale very well with body size, but expenditure of energy per gram body mass over lifetime tends to be constant (Speakman 2005)




References


Speakman, J. R. (2005). Body size, energy metabolism and lifespan. Journal of Experimental Biology 208, 1717-1730. Available at: http://www.ncbi.nlm.nih.gov/pubmed/15855403.