Circa-tidal Pacemakers in the Nervous System of an Amphipod

  • Elfed Morgan
  • Gerard J. Harris
  • Walter F. Holmström
Part of the Satellite Symposia of the IUPHAR 9th International Congress of Pharmacology book series (SSNIC)

Abstract

Control centres for endogenous rhythms of circadian frequency have been located in the pineal gland and in the supra-chiasmatic nucleus of vertebrates (e.g. see this volume), and analagous structures have been identified in the nervous system of invertebrates (see review by Page, 1981). In contrast oscillators controlling the circa-tidal rhythms shown by so many intertidal animals have yet to be located. Naylor and Williams (1968) rephased the tidal activity rhythms of the shore crab Carcinus by chilling the eye stalks alone, thus implicating the x organ/sinus gland complex, but endogenous circatidal periodicity has also been demonstrated in the swimming activity of many sessile eyed crustaceans. The location and nature of the mechanism controlling the rhythmic swimming of one such animal, the estuarine amphipod Corophium volutator is the subject of the present communication.

Keywords

Ethylene Glycol Polystyrene Photography Dian Valinomycin 

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Reference

  1. Harris, G.J. and Morgan, E. (1984a). The effects of ethanol valinomycin and cyclohexamide on the endogenous circa-tidal rhythm of the estuarine amphipod Corophium volutator (Pallas). Mar. Behav. Physiol., 10, 219–233.CrossRefGoogle Scholar
  2. Harris, G.J. and Morgan, E. (1984b). The effects of salinity changes on the endogenous circa-tidal rhythms of the amphipod Corophium volutator (Pallas). Mar. Behav. Physiol., 10, 199–217.CrossRefGoogle Scholar
  3. Harris, G.J. and Morgan, E. (1984c). The location of circa-tidal pacemakers in the estuarine amphipod Corophium volutator (Pallas) using a selective chilling technique. J. exp. Biol. (in press).Google Scholar
  4. Holmström, W.F. and Morgan, E. (1983a). Variation in the naturally occurring rhythm of the estuarine amphipod Corophium volutator (Pallas). J. mar. biol. Ass. U.K., 65, 833–850.CrossRefGoogle Scholar
  5. Holmström, W.F. and Morgan, E. (1983b). The effects of low temperature pulses in rephasing the endogenous activity rhythm of Corophium volutator (Pallas). J. mar. biol. Ass. U.K., 63, 851–860.CrossRefGoogle Scholar
  6. Holmström, W.F. and Morgan, E. (1983c). Laboratory entrainment of the rhythmic swimming activity of Corophium volutator (Pallas) to cycles of temperature and periodic inundation. J. mar. biol. Ass. U.K., 63, 861–870.CrossRefGoogle Scholar
  7. Naylor, E. and Williams, B.G. (1968). Effects of eyestalk removal on rhythmic locomotor activity in Caroinus. J. exp. Biol., 49, 107–116.Google Scholar
  8. Page, T.L. (1981). Neural and endocrine control of circadian rhythmicity in invertebrates. In Handbook of Behavioural Neurobiology. Vol. 4, Biological Rhythms (ed. J. Aschoff) Plenum Press, New York and London.Google Scholar

Copyright information

© The Contributors 1985

Authors and Affiliations

  • Elfed Morgan
  • Gerard J. Harris
  • Walter F. Holmström

There are no affiliations available

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