Adaptation and acclimation of aerobic exercise physiology in Lake Whitefish ecotypes (Coregonus clupeaformis)

摘要: The physiological mechanisms underlying local adaptation in natural populations of animals, and whether the same contribute to acclimation, are largely unknown. Therefore, we tested for evolutionary divergence aerobic exercise physiology laboratory bred, size-matched crosses ancestral, benthic, normal Lake Whitefish (Coregonus clupeaformis) derived, limnetic, more actively swimming "dwarf" ecotypes. We acclimated fish constant (emulating limnetic foraging) control conditions activity levels) simultaneously study phenotypic plasticity. found extensive between ecotypes: dwarf generally had constitutively higher values traits related oxygen transport (ventricle size) use by skeletal muscle (percent oxidative muscle, mitochondrial content), also evolved differential plasticity function (Complex I flux through Complexes I-IV IV). effects swim training were less pronounced than differences among ecotypes which a significant effect protein content, ventricle malate dehydrogenase activity, Complex V activity) did not differ Only one trait, mass, varied similar manner with acclimation followed pattern consistent genetic accommodation. Overall, biochemical differ.