Abstract:
:Circadian rhythms of pineal melatonin release were measured in freely moving pigeons (Columba livia) by in vivo microdialysis. The birds were placed in light-dark cycles with 12 h of light and 12 h of darkness (LD 12:12) or continuous dim light (LLdim) after LD 12:12. Although the level of melatonin was various, daily changes of melatonin with higher levels during the dark and lower levels during the light were observed in all of the birds examined. The daily changes of melatonin persisted in LLdim, indicating circadian nature of pineal melatonin release. Moreover pineal melatonin release was inhibited by acute exposure of light during the dark. These results indicate that microdialysis is useful for studying circadian pineal melatonin rhythms of birds.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Hasegawa M,Ebihara Sdoi
10.1016/0304-3940(92)90811-kkeywords:
subject
Has Abstractpub_date
1992-12-14 00:00:00pages
89-92issue
1-2eissn
0304-3940issn
1872-7972pii
0304-3940(92)90811-Kjournal_volume
148pub_type
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