Laboratorium voor Morfologie en Systematiek der Dieren, Ledeganckstraat 35, B-9000 Ghent, Belgium. Peter Aerts is a senior research assistant of the Belgium National Fund for Scientific Research.
Variability of the fast suction feeding process in Astatotilapia elegans (Teleostei: Cichlidae): a hypothesis of peripheral feedback control
Article first published online: 23 MAR 2009
Journal of Zoology
Volume 220, Issue 4, pages 653–678, April 1990
How to Cite
Aerts, P. (1990), Variability of the fast suction feeding process in Astatotilapia elegans (Teleostei: Cichlidae): a hypothesis of peripheral feedback control. Journal of Zoology, 220: 653–678. doi: 10.1111/j.1469-7998.1990.tb04741.x
- Issue published online: 23 MAR 2009
- Article first published online: 23 MAR 2009
- Accepted 17 May 1989
Movement analysis of the ‘volume suction’ feeding type in Astarotilapia elegans suggests the existence of an inhibiting peripheral feedback control on the fast movements of the head parts, apparently triggered by the food items entering through the mouth aperture. As soon as the prey passes the mouth, rostral expansion of the buccopharyngeal cavity stops. On the basis of a mathematical model and physiological evidence, respectively, visual and chemical perception must probably be excluded as the initial stimulus of the feedback control. The simulation of the hydrodynamic characteristics of the suction flow at the level of the gape reveals sudden changes in the pressure and acceleration waves coupled to the moment of prey uptake. These fluctuations are premised to generate the triggering signal. The possibility of modulation entails re-evaluation of the neuro-motoric preprogamming concept.