..., in vivo microdialysis was applied to these organs. In both pigeons and Japanese quails, pineal and ocular melatonin levels were high during the dark and low during the day under light-dark (LD) cycles. These rhythms persisted under constant dim light (LLdim) conditions indicating the circadian nature...

..., acetylcholine, epinephrine and norepinephrine. Studies on the relative binding density of [ 125 I]iodomelatonin to the kidney in different species of birds showed the following descending order: duck > chicken > pigeon > quail. It has been reported that [ I25 I]iodomelatonin-binding sites exist...