Photoperiodically Significant Photoreception in Sparrows: Is the Retina Involved?
- 16 January 1970
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 167 (3916) , 298-301
- https://doi.org/10.1126/science.167.3916.298
Abstract
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.Keywords
This publication has 3 references indexed in Scilit:
- Enzymatic Synthesis of Melatonin in Avian Pineal Body: Extraretinal Response to LightScience, 1968
- Extraretinal light perception in the sparrow. II. Photoperiodic stimulation of testis growth.Proceedings of the National Academy of Sciences, 1968
- Extraretinal light perception in the sparrow. I. Entrainment of the biological clock.Proceedings of the National Academy of Sciences, 1968