Genetic differences in physiological tolerances of Amargosa pupfish (Cyprinodon nevadensis) populations
Hirshfield MF, Feldmeth CR, Soltz DL. 1980. Genetic differences in physiological tolerances of Amargosa pupfish (Cyprinodon nevadensis) populations. Science. 207(4434):999-1001
Evolution theory predicts more limited tolerance of temperature and oxygen variation for fish from an environment with a constant temperature than for those from variable habitats. Amargosa pupfish (Cyprinodon nevadensis) from the Death Valley area support this, with pupfish from a constant temperature spring having a narrower range of tolerances than those from the variable Amargosa River. This difference indicates genetic divergence since the isolation of these populations. Graphs show oxygen and temperature limitations.
- Type
- Journal Article
- Authors
- Hirshfield, Michael; Feldmeth, C; Soltz, David
- Units
- DEVA
- Keywords
- Amargosa pupfish (Cyprinodon nevadensis), Animal Studies, Death Valley National Park CA NV, Evolution, Genetics, Water Temperature