Entrainment of the Melatonin Rhythms in Early Postnatal Lambs and Their Mothers
dc.contributor.author | Wood, Ruth | en_US |
dc.contributor.author | Claypool, Lee | en_US |
dc.contributor.author | Ebling, Francis J. P. | en_US |
dc.contributor.author | Foster, Douglas L. | en_US |
dc.date.accessioned | 2010-04-13T20:18:07Z | |
dc.date.available | 2010-04-13T20:18:07Z | |
dc.date.issued | 1989 | en_US |
dc.identifier.citation | Wood, Ruth; Claypool, Lee; Ebling, Francis J. P.; Foster, Douglas (1989). "Entrainment of the Melatonin Rhythms in Early Postnatal Lambs and Their Mothers." Journal of Biological Rhythms 4(4): 457-465. <http://hdl.handle.net/2027.42/68290> | en_US |
dc.identifier.issn | 0748-7304 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/68290 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=2519606&dopt=citation | en_US |
dc.description.abstract | Although the developing sheep can produce an appropriately timed melatonin rhythm as early as 1 week after birth, it is not known whether the lamb is able to adjust its melatonin rhythm to a change in daylength. The ability of the young lamb to entrain its pattern of melatonin secretion to a new photoperiod was determined in the present study. Eight female lambs and their mothers were raised in long days (LD 16:8) beginning 2 weeks post partum. At 7 weeks of age, the time of lights-off was advanced 8 hr, the short-day photoperiod then being LD 8:16; the time of lights-on remained unchanged. Concentrations of melatonin were measured in blood samples collected hourly on days - 1, 0, 2, 4, 6, and 13 relative to the light change. On day 0, all mothers and daughters had advanced the onset of melatonin secretion by at least 1 hr, and by day 13, 12 of 16 had completely entrained to the new photoperiod. The rate of entrainment among individuals varied; the mean rate for lambs and mothers did not differ. This study provides evidence that the melatonin-rhythm-generating system matures shortly after birth. | en_US |
dc.format.extent | 3108 bytes | |
dc.format.extent | 529520 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.publisher | Sage Publications | en_US |
dc.title | Entrainment of the Melatonin Rhythms in Early Postnatal Lambs and Their Mothers | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Complementary and Alternative Medicine | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Reproductive Sciences Program, Departments of Physiology, Obstetrics and Gynecology, and Biology, The University of Michigan, Ann Arbor, Michigan 48109-0404 | en_US |
dc.contributor.affiliationum | Room 1101SW, 300 North Ingalls Building, The University of Michigan, Ann Arbor, Michigan 48109-0404. | en_US |
dc.contributor.affiliationother | Wisconsin Regional Primate Research Center, 1223 Capitol Court, Madison, Wis consin53715. | en_US |
dc.contributor.affiliationother | Department of Anatomy, University of Cambridge, Cambridge, UK. | en_US |
dc.identifier.pmid | 2519606 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/68290/2/10.1177_074873048900400405.pdf | |
dc.identifier.doi | 10.1177/074873048900400405 | en_US |
dc.identifier.source | Journal of Biological Rhythms | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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