Fig. 3From: Relationships between interspecific differences in the mass of internal organs, biochemical markers of metabolic activity, and the thermogenic properties of three small passerinesCorrelations between log metabolic rate and state-4 respiration in the liver (a), and cytochrome c oxidase (COX) activity in the liver (b), state-4respiration in pectoral muscle (c) and cytochrome c oxidase (COX) activity in pectoral muscle (d), among Bramblings (Fringilla montifringilla), Little Buntings (Emberiza pusilla) and Eurasian Tree Sparrows (Passer montanus)Back to article page