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Studies on the Diet, Feeding Mechanism and Alimentary Tract in Two Closely Related Teleosts, the Freshwater Cottus gobio L. and the Marine Parenophrys bubalis Euphrasen
Author(s) -
Western J. R. H.
Publication year - 1969
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1969.tb00540.x
Subject(s) - biology , cottus , zoology , anatomy , predatory fish , predation , fish <actinopterygii> , ecology , fishery
The diet and feeding mechanism in Cottus gobio and Parenophrys bubalis are described, together with the morphology and histology of the alimentary tract. Both species are sluggish bottom dwelling, carnivorous fish, and are capable of catching and swallowing relatively large prey. The gut is fully differentiated into esophagus, stomach, intestine with pyloric ceca, and rectum. The liver is morphologically separate from the pancreas, and separate bile and pancreatic ducts open into the base of one of the pyloric ceca. The organisation of the gut is well suited to the fishes' mode of life, showing adaptations for taking large meals which may be at irregular intervals.