Research Highlights: Successful development of lake whitefishes depends on a narrow range of temperature


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Successful development of lake whitefishes depends on a narrow range of temperature

  • Lake whitefish is a species of freshwater fish found in North American lakes including all of the Great Lakes.
  • It is considered highly valuable in commercial fishing and occasionally used in sports fishing.
  • Lake whitefish embryos usually develop during the winter season; thus, these embryos may be susceptible to changes in temperature.
  • Researchers incubated whitefish embryos in different but constant temperatures and in varying temperatures.
  • They discovered that hatchlings had a lower survival rate in 8 °C and varying temperatures than in 2 °C and 5 °C temperatures.
  • Additionally, lake whitefish eggs tend to hatch earlier in 8 °C and varying temperatures compared to eggs in 2 °C and 5 °C temperatures.
  • Researchers also found that hatchlings in 8 °C and varying temperatures were significantly smaller than in 2 °C and 5 °C temperatures.
  • The study highlights the effect of temperature during embryonic development in lake whitefishes.

Source:

Eme, J., Mueller, C. A., Lee, A. H., Melendez, C., Manzon, R. G., Somers, C. M., Boreham, D. R., & Wilson, J. Y. (2018). Daily, repeating fluctuations in embryonic incubation temperature alter metabolism and growth of Lake whitefish (Coregonus clupeaformis). Comparative biochemistry and physiology. Part A, Molecular & integrative physiology226, 49–56. https://doi.org/10.1016/j.cbpa.2018.07.027


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