Synopsis
Two of the most important factors governing gastric emptying are meal volume and food composition. These factors have also been demonstrated to influence the secretion of gastric acid, digestive enzymes and gut hormones in both fish and mammals. In mammals, feedback loops involving gastrointestinal hormones have been implicated in the control of gastric motility and enzyme secretion. These findings are briefly reviewed and it is demonstrated how the functioning of the feedback loops could lead to changes in gastric emptying patterns. A simulation exercise was carried out incorporating these physiological observations into the emptying model. The results predicted that an exponential function would best describe the emptying of small, easily digested low energy food particles from the stomach, but that a linear expression would give a better fit to the emptying data when food consisted of high energy large sized particles. These predictions were supported by results obtained in a number of experimental studies. These results are discussed in terms of selecting methods for the estimation of daily food consumption of fish species.
Keywords
Myth (mith) n., a traditional story offering an explanation of some fact or phenomenon; a story with a veiled meaning; a figment. Adj., mythical: relating to myths; fabulous; untrue. (Gr. mythos)
Chambers 20th Century English Dictionary
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Jobling, M. (1986). Mythical models of gastric emptying and implications for food consumption studies. In: Simenstad, C.A., Cailliet, G.M. (eds) Contemporary studies on fish feeding: the proceedings of GUTSHOP ’84. Developments in environmental biology of fishes, vol 7. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1158-6_3
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