Abstract
1. 1. Electroretinogram (ERG) and motor activity circadian rhythms in crayfish under constant environmental conditions were recorded. 2. 2. Changes on the circadian parameters induced by application of a single light stimulus of 2000 Ix and 10 min duration on either the eyestalk or the 6th abdominal ganglion were analyzed. 3. 3. The synchronization ability exerted by the caudal photoreceptors on the ERG and on motor circadian rhythms is discussed. 4. 4. In gangliectomized crayfish, there is a phase inversion in ERG circadian rhythm and an increment of the total amount of activity in motor circadian rhythm, but there is no evidence of synchronization when a single stimulus is applied on the place occupied by the removed 6th abdominal ganglion. 5. 5. It is proposed that extraocular photoreceptors can participate in the entrainment by light of the circadian rhythms of crayfish.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Comparative Biochemistry and Physiology Part A: Physiology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
