*Fisheries Officer, Opobo, Eastern Region, Nigeria, W. Africa.
THE FEEDING MECHANISM OF THE FISH SPARISOMA GRETENSE (LINNE)
Article first published online: 21 AUG 2009
1956 The Zoological Society of London
Proceedings of the Zoological Society of London
Volume 127, Issue 1, pages 59–77, September 1956
How to Cite
BOARD, P. A. (1956), THE FEEDING MECHANISM OF THE FISH SPARISOMA GRETENSE (LINNE). Proceedings of the Zoological Society of London, 127: 59–77. doi: 10.1111/j.1096-3642.1956.tb00460.x
- Issue published online: 30 OCT 2009
- Article first published online: 21 AUG 2009
- 13th December 1995
A description is given of structures within the mouth and pharynx of the Parrot Fish, Sparisoma cretense (L.).
Suggestions that the fish is able to ruminate are shown to be unsupported by the facts available.
It is suggested that the fish carries on a type of filter feeding, the filter consisting of the posterior gill-rakers of the second and third gill arches.
Food particles which collect on the filter are scraped off by the anterior portion of the pharyngeal valve.
Particles on the floor of the pharynx behind the last gill slit are pushed backward in a film of mucus by the posterior portion of the valve.
The movements of the pharyngeal valve during feeding are in phase with the backward and forward movements of the superior pharyngeals, except when the particles being dealt with are large enough to demand some adjustment in the movements of the pharyngeal valve. The feeding mechanism can deal with any particle small enough to enter the mouth.