Document Detail

Photoperiodically significant photoreception in sparrows: is the retina involved?
MedLine Citation:
PMID:  5460604     Owner:  NLM     Status:  MEDLINE    
Blind house sparrows (150 birds) and normal ones (199 birds) were subjected to various photoperiodic treatments consisting of cycles of 12 hours light, 12 hours dark and 16 hours light, 8 hours dark at intensities ranging from 20 to 500 lux. The testicular, response of the blind birds was found to be indistinguishable from the response of normal birds under these conditions. The data show that a functional extraretinal photoreceptor exists in this species which is fully capable of mediating the gonadal response to photoperiodic stimuli.
H Underwood; M Menaker
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  167     ISSN:  0036-8075     ISO Abbreviation:  Science     Publication Date:  1970 Jan 
Date Detail:
Created Date:  1970-02-02     Completed Date:  1970-02-02     Revised Date:  2011-12-07    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  298-301     Citation Subset:  IM    
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MeSH Terms
Organ Size
Retina / physiology*
Testis / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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