The Circadian System of Crustaceans
- 1 January 1993
- journal article
- review article
- Published by Taylor & Francis in Chronobiology International
- Vol. 10 (1), 1-19
- https://doi.org/10.3109/07420529309064477
Abstract
Crustaceans exhibit a variety of overt circadian rhythms. Observations on intact animals suggest the existence of more than one circadian pacemaker in the nervous system. Ablation experiments so far have been inconclusive in pinpointing the location of putative pacemakers. However, various structures, most notably the optic peduncle, have been shown to sustain circadian rhythmicity in vitro. Retinal sensitivity and neurosecretory activity display circadian rhythms in the isolated optic peduncle, but they are also responsive to synchronizing influences from other regions of the central nervous system, most notably the supra-esophageal ganglion. A model based on a number of circadian pacemakers distributed in the central nervous system best fits the experimental results at present. Coupling of rhythmicity between independent circadian pacemakers is likely to occur, and a neuroendocrine stage of integration has been proposed for several rhythms. Various entraining agents have been identified, and more than one may play a part in the synchronization of a given rhythm.Keywords
This publication has 49 references indexed in Scilit:
- Contributions Made to Chronobiology by Studies of Fiddler Crab RhythmsChronobiology International, 1991
- Comparative studies of tidal rhythms. III. Spontaneous splitting of the peaks of crab locomotory rhythmsMarine Behaviour and Physiology, 1987
- Phase-Responsiveness of the Circatidal Locomotor Activity Rhythm of Hemigrapsus Edwardsi (Hilgendorf) to Simulated High TideJournal of the Marine Biological Association of the United Kingdom, 1984
- Correlation between motor and electroretinographic circadian rhythms in the crayfish Procambarus bouvieri (ortmann)Comparative Biochemistry and Physiology Part A: Physiology, 1980
- Entrainment of the circadian locomotor activity rhythm in crayfishJournal of Comparative Physiology A, 1972
- Comparative Studies of Circadian Locomotory Rhythms in Four Species of Terrestrial CrabsThe American Midland Naturalist, 1971
- Circadian rhythm of responsiveness in crayfish visual unitsJournal of Neurobiology, 1969
- Effects of Eyestalk Removal On Rhythmic Locomotor Activity in CarcinusJournal of Experimental Biology, 1968
- Influence of Temperature Fluctuations on the Diurnal Melanophore Rhythm of the Fiddler Crab UcaPhysiological Zoology, 1957
- Studies of the Daily Rhythmicity of the Fiddler Crab, Uca. Modifications by LightPhysiological Zoology, 1949