Document Detail

Effects of light or different earth-strength magnetic fields on the nocturnal melatonin concentration in a migratory bird.
MedLine Citation:
PMID:  8028796     Owner:  NLM     Status:  MEDLINE    
The effects of light or artificial earth-strength magnetic fields (MFs) on pineal melatonin synthesis were studied in the Pied Flycatcher, a migratory bird. Serum melatonin levels exhibited a circadian rhythm with the highest values during the night and lowest during the day. Nocturnal melatonin synthesis was significantly diminished following exposure to light during the night. It was reduced by a similar extend after exposure to an artificial MF that simultaneously reversed the horizontal component of the field and altered its intensity. In contrast, melatonin levels were not significantly changed when the bird was exposed to a MF that changed only in intensity or direction.
T Schneider; H P Thalau; P Semm
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Neuroscience letters     Volume:  168     ISSN:  0304-3940     ISO Abbreviation:  Neurosci. Lett.     Publication Date:  1994 Feb 
Date Detail:
Created Date:  1994-08-08     Completed Date:  1994-08-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7600130     Medline TA:  Neurosci Lett     Country:  IRELAND    
Other Details:
Languages:  eng     Pagination:  73-5     Citation Subset:  IM    
Zoological Institute, University of Frankfurt, FRG.
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MeSH Terms
Birds / physiology*
Circadian Rhythm* / radiation effects
Melatonin / blood,  metabolism*
Pineal Gland / metabolism*,  radiation effects
Reg. No./Substance:

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