Suppression of nocturnal increases in levels of melatonin elicits an anticipatory behavior in male quail
作者:
Mitsuaki Ohta,
Hidehiko Konishi,
期刊:
Journal of Interdisciplinary Cycle Research
(Taylor Available online 1992)
卷期:
Volume 23,
issue 1
页码: 34-46
ISSN:0022-1945
年代: 1992
DOI:10.1080/09291019209360126
出版商: Taylor & Francis Group
关键词: Melatonin;anti‐melatonin;behavior;male quail
数据来源: Taylor
摘要:
During the reproductive development of male Japanese quail the duration of daily activity is prolonged and the onset of the rhythm of activity is advanced relative to the light‐dark cycle. The neuroendocrine basis for these changes was investigated with focusing on plasma levels of melatonin and testosterone. By means of 4 additional hours of photic stimulation of the brain, after the environmental lights (8L: 16D, lights on at 1000 hr) were turned off, the increase in levels of melatonin after lights‐off was suppressed for a few days. Thereafter the early onset of daily locomotor activity was observed and the gonads began to develop. Similar behavioral changes occurred in castrated quail following direct brain‐illumination or testosterone implants. The testosterone implants also suppressed the increases in levels of melatonin after lights‐off, for a few days. Treatment with an antiserum raised against melatonin (anti‐M) for the first 3 days, to suppress the increases in levels of melatonin after lights‐off, elicited such an anticipatory behavior. These results suggest that suppression of the nocturnal rise in melatonin levels is important for the first steps toward reproductive activity in male Japanese quail.
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