G. Evelyn Hutchinson proposed that (*) ratios of this quantity among related, sympatric species would tend toward 1.3.
The Jarman-Bell principle describes the hypothesis that organisms with high values of this quantity can subsist on low-quality food. The energetic equivalence rule suggests that fluxes of energy at the population level are independent of this quantity, which implies an inverse relationship between population density and this quantity. Cope's rule describes the apparent tendency of this quantity to increase over evolutionary time. G. Evelyn Hutchinson proposed that (*) ratios of this quantity among related, sympatric species would tend toward 1.3. The West-Brown-Enquist model seeks to explain the three-quarters power allometric scaling of metabolic rate with this quantity, which is described by Kleiber's law. This quantity tends to decline at high latitudes according to Bergmann's rule. For 10 points, name this feature of an organism that often evolves to extremes on islands, causing gigantism or dwarfism.
The Jarman-Bell principle describes the hypothesis that organisms with high values of this quantity can subsist on low-quality food.
body size [or body mass; or body volume; or body length] 