Morphology and histology of the alimentary tracts of ambassidae (Cuvier) (Teleostei) in relation to feeding

Journal of Morphology
T J Martin, S J M Blaber

Abstract

The gross morphology and histology of the alimentary tracts of three species of glassy perchlet; Ambassis productus, A. natalensis, and A. gymnocephalus from estuaries on the southeast coast of Africa were investigated. The anatomy of the digestive tracts in all three species was found to be similar. Well-developed dentition and pharyngeal teeth together with a distensible stomach and a low relative gut length (RGL) suggest a predatory and carnivorous habit for all three species. The relative gut lengths of Ambassis species from different estuarine systems are compared‥ Differences in RGL for A. productus and A. natalensis from the Kosi and St Lucia systems with fish from Mdloti estuary are discussed. It is suggested that decreased RGL for fish at Mdloti is attributable to decreased food availability and not to a lack in the calorific content of their diet. Histological investigation revealed the presence of the following regions: a pharynx; an oesophagus; a stomach differentiated into cardiac and pyloric regions; a duodenum or upper intestine; an ileum or lower intestine; and a rectum. Pyloric and rectal sphincters are present. The tunics of the above regions are described. The epithelium of the oesophagus contains taste buds ...Continue Reading

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Citations

Jan 18, 2019·Microscopy Research and Technique·Alaa El-Din H SayedFatma Essa
Dec 24, 1997·Anatomia, histologia, embryologia·A M GargiuloV Pedini
May 20, 1998·Anatomia, histologia, embryologia·A M GargiuloV Pedini
Jun 1, 1990·Journal of Morphology·Thomas Caceci, Terry C Hrubec

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