Effects of intra-duodenal infusions of fat on the fool intake of sheep

D.A. Titchen, C.S.W. Reid and P. Vlieg

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Proceedings of the New Zealand Society of Animal Production. 1966, 26: 36-51

The intra-duodenal infusion of 100 to 150 ml of peanut oil over 17 hours depressed food intake in seven sheep and also caused a reduction in stomach movements and led to diarrhoea. The reduced food intake preceded the other effects. Fifty millilitres of peanut oil infused into the duodenum over 17 hours did not have any of these effects.

More rapid infusions of smaller amounts of peanut oil. olive oil, soya bean oil, a hydrolysate of peanut oil and of oleic acid (11.5 or 23 ml over 30 minutes) led to a reduction in the movements of both the reticulum and rumen. "B sequences" of rumen contractions were less affected than were "A sequences". A depression of food intake was also observed on some occasions with the more rapid infusions. The hydrolysate of peanut oil and oleic acid both had more profound effects than did peanut oil or olive oil. Intra-duodenal infusions of 100ml heavy liquid paraffin B.P. over 17 hours failed to depress the food intake, reduce the motility of the reticulum or rumen or to produce diarrhoea. More rapid infusions of paraffin appeared to increase the frequency of reticulum and rumen movements.

The significance of these observations in relation to food intake regulation is discussed.

Keywords: NZSAPAB;

Last Updated 24-08-2000