...: Mitochondrial metabolism in Drosophila melanogaster is affected by phenotypic plasticity and mechanistically linked to the oxidation of specific substrates at high temperatures. Mitochondrial oxygen consumption Acclimation CT max Insects Fatty acids Oxidative substrates Mitochondrial density...

... and often have reduced activity levels. At muscle masses <42% of body mass, birds have body temperatures and basal rates higher than mammals with the same muscle mass. Their high basal rates derive from fast blood flow and increased mitochondrial density in their pectoral muscles. These enhancements also...

... and NaCl uptake in dilute, acidic media. * Author for correspondence (e-mail: [email protected] ) 27 9 2007 © The Company of Biologists Limited 2007 2007 hemolymph pH pH homeostasis Malpighian tubules rectum mitochondrial density mosquito larva Aedes aegypti...

..., and the non-linear relationship between respiration rate and membrane potential was quantified. Mitochondrial densities of both tissues were measured by applying the point-contact method to electron micrographs so that proton leak activity of the entire tissue could be assessed. In all three shark species...

... normalized to DNA content). Once an advanced larval stage had been reached (day 47–60), cell-specific respiratory rate and mitochondrial densities (citrate synthase activity normalized to DNA content) were more equivalent between fed and unfed larvae, suggesting that size-specific metabolic rates were...