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The Location of Circa-Tidal Pacemakers in the Estuarine Amphipod Corophium Volutator Using a Selective Chilling Technique
1 Department of Zoology and Comparative Physiology, University of Birmingham, Birmingham B15 2TT
1. The anatomical location of the control centre(s) for the endogenous tidal rhythm of swimming activity shown by Corophium volutator (Pallas) has been investigated using a selective chilling technique.
2. Rephasing occurred on chilling the whole animal to -3 °C or on chilling either the supra- or sub-oesophageal ganglion alone, whereas cold pulses applied to the telson or mid-body regions were without effect.
3. Ablating the eyes had no effect on the endogenous rhythm.
4. The results are interpreted in terms of two autonomous control centres.
Key words: Amphipod, circa-tidal pacemakers
Accepted on December 12, 1983