Effects of Quantity and Quality of Feed on Gastric Secretion in
the Sheep
L.M. McLeay and D.A. Titchen
Department of Veterinary Preclinical Sciences, University of
Melbourne, Australia
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Proceedings of the New Zealand Society of Animal Production. 1973, 33: 158-163
Gastric secretion from fundic pouches of the abomasa was studied
in sheep. The subjects included animals with simple fundic pouches and
others which had in addition an antral pouch or antrectomy. All showed
continuous secretion which decreased on restriction of their feed
intake. Increases in the volume of secretion, its acid concentration (by
as much as 15 m-equiv H+/I) and output of pepsin, occurred
when the diet was changed to lucerne hay from mixtures of lucerne and
wheaten hays. The changes were reversible. Increases when additional
feed or better quality feed were made available occurred within 48
hours. More delayed responses were also noted, occurring up to 10 days
after better quality feed was provided. The demonstrations of these
changes in animals with a pouch of the pyloric antrum and an antrectomy
emphasize the importance of stimuli other than those derived from the
antrum in the stimulation of gastric secretion and in contributing to
secretory responses to changes in diet.
Keywords: NZSAPAB;
Last Updated 24-08-2000
