Physiological tradeoffs may underlie the evolution of hypoxia tolerance and exercise performance in sunfish (Centrarchidae).

@article{Crans2015PhysiologicalTM,
  title={Physiological tradeoffs may underlie the evolution of hypoxia tolerance and exercise performance in sunfish (Centrarchidae).},
  author={Kyle D. Crans and Nicole A Pranckevicius and Graham R Scott},
  journal={The Journal of experimental biology},
  year={2015},
  volume={218 Pt 20},
  pages={
          3264-75
        }
}
Tradeoffs between hypoxia tolerance and aerobic exercise performance appear to exist in some fish taxa, even though both of these traits are often associated with a high O2 transport capacity. We examined the physiological basis for this potential tradeoff in four species of sunfish from the family Centrarchidae. Hypoxia tolerance was greatest in rock bass, intermediate in pumpkinseed and bluegill and lowest in largemouth bass, based on measurements of critical O2 tension (Pcrit) and O2 tension… CONTINUE READING

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