RHYTHMIC MOVEMENTS OF CONES IN THE RETINA OF BLUEFISH, POMATOMUS SALTATRIX, HELD IN CONSTANT DARKNESS
Open Access
- 1 December 1968
- journal article
- other
- Published by University of Chicago Press in The Biological Bulletin
- Vol. 135 (3) , 530-536
- https://doi.org/10.2307/1539715
Abstract
1. The retina of bluefish, Pomatomus saltatrix, undergoes photomechanical changes in response to light and darkness. Complete light-adaption requires between 15 and 30 minutes, complete dark-adaption between 30 and 60 minutes. 2. Retinal cones of juvenile bluefish held under continuous darkness for two days exhibited a diurnal retinomotor rhythm. The epithelial pigment layer remained in a dark-adapted condition throughout the two days and displayed no discernible expansion. 3. Results were related with activity rhythms of bluefish and suggested that internal control of a retinomotor rhythm may predispose the eye to environmental changes in light intensity.Keywords
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