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Science 16 January 1970:
Vol. 167. no. 3916, pp. 298 - 301
DOI: 10.1126/science.167.3916.298
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Articles

Photoperiodically Significant Photoreception in Sparrows: Is the Retina Involved?

Herbert Underwood 1 and Michael Menaker 1

1 Department of Zoology, University of Texas, Austin 78712

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.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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S. Doyle and M. Menaker (2007)
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Induction of Zugunruhe by photostimulation of encephalic receptors in white-crowned sparrows.
K Yokoyama and D. Farner (1978)
Science 201, 76-79
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Photoreception in Sparrows.
H. Underwood and M. Menaker (1971)
Science 172, 293
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Photosensitivity of the Circadian Rhythm and of Visual Receptors in Carotenoid-Depleted Drosophila.
W. F. Zimmerman and T. H. Goldsmith (1971)
Science 171, 1167-1169
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Extraretinal Light Perception: Entrainment of the Biological Clock Controlling Lizard Locomotor Activity.
H. Underwood and M. Menaker (1970)
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Photoreception in Sparrows: Response to Photoperiodic Stimuli.
D. F. Lott, H. Underwood, and M. Menaker (1970)
Science 169, 892-893
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Science. ISSN 0036-8075 (print), 1095-9203 (online)