Population differences in body size, mass-adjusted routine metabolic rates, and total organismal energy demands.

<p>Variation in (a) body size, (b) mass-adjusted routine metabolic rate, and (c) total routine metabolic rate. Depicted are estimated marginal means (EMM ± standard error) based on analytical models presented in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0186935#pone.0186935.t002" target="_blank">Table 2</a>. Populations are organized by river drainage; blue symbols represent non-sulphidic populations, yellow symbols sulphidic ones. Mean values of covariates used for the calculation of EMM of mass-adjusted routine metabolic rate were as follows: mass = 0.83 g; temperature = 25.1°C. (d) Differences in mass-adjusted routine metabolic rate between wild-caught (circles) and laboratory-reared (squares) fish from a subset of populations. Mean values of covariates used for the calculation of EMM were as follows: mass = 0.72 g; temperature = 24.2°C.