Influence of Ruminal, Abomasal and Intestinal Fistulation on Digestion in Steers1,2

Hayes, B. W.; Little, C. O.; Mitchell, G. E.

doi:10.2527/jas1964.233764x

Cited by 28 publications

(15 citation statements)

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“…Two studies by Forbes (unpublished data) in Oklahoma, one with fistulated and nonfistulated cattle grazing Bothriochloa caucasica pastures and the other with fistulated and nonfistulated sheep fed Medicago sativa hay, showed no differences in faecal N concentration between fistulated and non-fistulated animals. The results of the ADF analysis suggest that there was no difference between the fistulated and non-fistulated animals in their digestive efficiency, in accord with the evidence that ruminal, abomasal or intestinal fistulae and cannulae have little effect on diet digestion (Drori and Loosli, 1959;Hayes et al, 1964;MacRae and Wilson, 1977).…”

Section: Discussionsupporting

confidence: 81%

Comparative studies of ingestive behaviour and diet composition in oesophageal‐fistulated and non‐fistulated cows and sheep

Forbes

Beattie²

1987

Grass and Forage Science

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A series of comparisons was made of the bite rates of fistulated and non-fistulated cattle and sheep, grazing four grassy hill plant communities over four years. Both bite rates and grazing times were recorded on two occasions. Comparative observations were also made on faecal cuticle concentrations on one grassy and one dwarf shrub community and on faecal ash, nitrogen (N) and acid detergent fibre (ADF) concentrations throughout one year.Faecal N concentrations were slightly but consistently higher in fistulates than in nonfistulates, but faecal ADF and ash concentrations and the relative proportions of faecal cuticle fragments were similar and did not indicate differences in either diet composition or digestive efficiency. Bite rates did not differ significantly between fistulates and non-fistulates, except on the two occasions when fistulates carried Vibracorders to measure grazing time without preliminary training, and grazing times did not differ significantly. There were significant differences between cattle and sheep in most variables.On the basis of this evidence, there is no reason to expect that fistulated and non-fistulated animals of similar history and nutritional background will differ in grazing behaviour or diet composition.

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Section: Discussionsupporting

confidence: 81%

Comparative studies of ingestive behaviour and diet composition in oesophageal‐fistulated and non‐fistulated cows and sheep

Forbes

Beattie²

1987

Grass and Forage Science

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“…Moreover results of indirect studies are conflicting. Evidence that digestibility performances of young and mature cattle (Drori & Loosli, 1959;Ridley, Lesperance, Jensen & Bohman, 1963;Hayes, Little & Mitchell, 1964;Putman & Davis, 1965) and sheep (Macrae & Wilson, 1977) were not affected by cannulation of the rumen, abomasum or small intestine was not supported by findings of other studies (Connor, Bohman, Lesperance & Kinsinger, 1963;. Inserting re-entrant cannulas into the duodenum J. W. SISSONS AND R. H. SMITH of sheep did not permanently affect appetite or weight gains (Harris & Phillipson, 1962), but did lead to depression in wool growth (Macrae & Wilson, 1977); although wool growth was not affected in animals fitted with rumen or duodenal T-piece cannulas.…”

Section: Introductionmentioning

confidence: 99%

Effect of duodenal cannulation on abomasal emptying and secretion in the preruminant calf.

Sissons¹,

Smith²

1982

The Journal of Physiology

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SUMMARY1. The effect of re-entrant cannulation of the duodenum on digesta flow from, and secretion into, the abomasum of the preruminant calf was studied.2. Calves fitted with abomasal cannulas and, at the same time or later, with re-entrant duodenal cannulas were given, by abomasal infusion, test feeds containing glucose and minerals. Net volumes of secretary fluids entering the abomasum and amounts of digesta flowing to the duodenum were estimated from changes in concentrations of water soluble markers (phenol red and polyethylene glycol) in digesta samples collected from an abomasal cannula.3. Amounts of abomasal contents, net volumes of secretary fluids and digesta flow to the duodenum for calves fitted with only an abomasal cannula did not differ significantly from those obtained for animals with abomasal and re-entrant duodenal cannulas.4. Collecting digesta from a re-entrant cannula and returning it promptly to the animal did not affect net volumes of secretary fluids. Under these conditions with cannulas open to the atmosphere, rather than being connected together, the amounts of digesta entering the duodenum increased slightly but differences were not significant.5. Weight gains of calves fitted with abomasal and duodenal cannulas were similar to those of intact animals.6. It is concluded that in calves receiving liquid feeds duodenal re-entrant cannulation is a suitable preparation for investigating digestive processes of the abomasum.

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“…Despite these apparent influences of intestinal cannulas on motility, changes in digestibility following intestinal cannulation have not been reported. Hayes et al (1964) compared data from intact steers with data from their twin siblings cannulated in the abomasum or intestine and found no differences in digestibility of feed. Similarly, MacRae (1975) reported no differences in digestibility by intact sheep compared to sheep with duodenal and ileal reentrant or simple-T cannulas.…”

Section: Effects On Digestion and Motilitymentioning

confidence: 99%

Considerations for gastrointestinal cannulations in ruminants.

Harmon

Richards

1997

Journal of Animal Science

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The complexity of ruminant digestion necessitates a greater variety and complexity of experimental methods than with any other species. The fact that dietary ingredients are first subjected to microbial fermentation requires elaborate measures to ascertain nutrients presented for absorption. Numerous approaches have been attempted to obtain representative samples of digesta at sites throughout the gastrointestinal tract. The choices of a researcher before an experiment include animal(s), site(s) for cannula placement, style of cannula, cannula material, and numerous other more subtle factors that may contribute to the success of an experiment. This review compares the advantages and disadvantages of various approaches, cannula types, and cannula materials that should be considered before experiments are conducted.

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Influence of Ruminal, Abomasal and Intestinal Fistulation on Digestion in Steers1,2

Cited by 28 publications

References 0 publications

Comparative studies of ingestive behaviour and diet composition in oesophageal‐fistulated and non‐fistulated cows and sheep

Comparative studies of ingestive behaviour and diet composition in oesophageal‐fistulated and non‐fistulated cows and sheep

Effect of duodenal cannulation on abomasal emptying and secretion in the preruminant calf.

Considerations for gastrointestinal cannulations in ruminants.

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