Vol. 21 (4) 2000 Neuro endocrinology letters

The effect of continuous darkness and illumination on the function and the morphology of the pineal gland in the domestic pig. Part I: The effect on plasma melatonin level.

: OBJECTIVES: Results of the majority of studies have revealed that diurnal changes in circulating melatonin level in the domestic pig differ from the typical patterns observed in other species. The aim of the present investigation was to study the effect of continuous darkness and continuous illumination on plasma melatonin in the pig......