Allometry

=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.