Serum cortisol levels in goats exhibit seasonal but not daily rhythmicity.

@article{AlilaJohansson2003SerumCL,
  title={Serum cortisol levels in goats exhibit seasonal but not daily rhythmicity.},
  author={Aino Alila-Johansson and Lea Eriksson and Timo Soveri and Maija-Liisa Laakso},
  journal={Chronobiology international},
  year={2003},
  volume={20 1},
  pages={
          65-79
        }
}
The aim of the study was to find out whether there is a daily rhythm in goat serum cortisol concentrations, whether the concentration profiles differ between normal light:dark and constant dark conditions, and whether any seasonal variations might be detected in daily cortisol secretion patterns. Seven Finnish landrace goats were kept at indoor temperature (18-23 degrees C) under artficial lighting that approximately simulated the annual changes of daylength at 60 degrees N. Blood samples were… CONTINUE READING

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