Siberian Stonechat (Saxicola maura) Science Article 2
It has been hypothesized that organisms living at different latitudes or in different environments adjust their metabolic activity to the prevailing conditions. However, do differences in energy turnover simply represent a phenotypic adaptation to the local environment, or are they genetically based?
Martin Wikelski, Proc. R. Soc. Lond. B (2003) 270, 2383-2388