Melatonin in the plasma of growing sheep subjected to short and skeleton long photoperiods
- 1 July 1984
- journal article
- Published by Springer Nature in Cellular and Molecular Life Sciences
- Vol. 40 (7) , 758-760
- https://doi.org/10.1007/bf01949765
Abstract
The levels of melatonin in plasma were measured at hourly intervals for 24 h in 8 sheep, 4 under 8L:16D (short day) and 4 under 7L:10D:1L:6D (skeleton long day) after 38 days of exposure. Mean concentrations did not differ significantly between treatments (52 pg/ml under short days; 91 pg/ml for skeleton long days), but the levels were more stable during 24 h in the SD treatment. Under skeleton long days there were 3 peaks during the 10D scotophase, with low levels during the 6D scotophase and the 7L photophase.Keywords
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