Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-12-03T13:40:46.707Z Has data issue: false hasContentIssue false
  • English
  • Français

Endoscopic observation of the reticulo-omasal orifice of cattle

Published online by Cambridge University Press:  27 March 2009

B. W. McBride ,
L. P. Milligan  and
B. V. Turner
B. W. McBride
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
L. P. Milligan
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
B. V. Turner
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
Get access Rights & Permissions [Opens in a new window]

Extract

A variety of factors influence the voluntary intake of ruminants including reticulo-rumen fill or distension (Campling & Balch, 1961; Welch, 1967; Grovum, 1979) and rate of passage of digesta through the gastrointestinal tract (Bines & Davey, 1970). The exit point of the reticulo-rumen, the reticulo-omasal orifice, potentially serves as a control site in regulation of particle movement from the rumen.

However, little definitive information on the functional behaviour of this anatomical location is available. Therefore, a fibre-optic endoscopic technique was designed to allow visual observation of the reticulo-omasal orifice in conscious, fed cattle.

America, New Hyde Park, NY) and a 35 mm camera (Olympus 0M-2N with 1–9 focusing screen) was attached. Photographs were taken at a shutter speed of 1/30 or 1/60 sec. The film used was Kodak (ASA 160) tungsten balanced slide film. Prints were generated from slides using the Cibachrome P30 process. An Olympus CLK-3 cold light source, having a colour temperature of 3200 °K, provided the illumination for projection through the endoscope. Opening and closing of the reticuloomasal orifice were photographed using this procedure.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 101 , Issue 3 , December 1983 , pp. 749 - 751
Copyright
Copyright © Cambridge University Press 1983

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Balch, C. C., Kelly, A. & Heim, G. (1951). Factors affecting the utilization of food by dairy cows. 4. The action of the reticulo-omasal orifice. British Journal of Nutrition 5, 207–216.Google Scholar
Bines, J. A. & Davey, A. W. F. (1970). Voluntary intake, digestion, rate of passage, amount of material in the alimentary tract and behaviour in cows receiving complete diets containing straw and concentrates in different proportions. British Journal of Nutrition 24, 1013–1028.CrossRefGoogle ScholarPubMed
Campling, R. C. & Balch, C. C. (1961). Factors affecting the voluntary intake of food by cows. 1. Preliminary observations on the effect, on the voluntary intake of hay, of changes in the amount of the reticulo-ruminal contents. British Journal of Nutrition 15, 523–530.CrossRefGoogle Scholar
Dougherty, R. W. (1981). Fistulas and pouches in ruminants. In Experimental Surgery in Farm Animals, 27 pp. Ames, Iowa: Iowa State University Press.Google Scholar
Grovum, W. L. (1979). Factors affecting the voluntary intake of food by sheep. 2. The role of distension and tactile input from compartments of the stomach. British Journal of Nutrition 42, 425–436.CrossRefGoogle ScholarPubMed
Poppi, D. P., Norton, B. W., Minson, D. J. & Hendricksen, R. E. (1980). The validity of the critical size theory for particles leaving the rumen. Journal of Agricultural Science, Cambridge 94, 275–280.Google Scholar
Smith, L. W., Waldo, D. R., Moore, L. A., Lefeel, E. C. & Van Soest, P. J. (1967). Passage of plant cell wall constituents in sheep. Journal of Dairy Science 50, 990.Google Scholar
Van Soest, P. J. (1966). Forage intake in relation to chemical composition and digestibility: some new concepts. Proceedings 23rd Southern Pasture Forage Crop Improvement Conference, Blacksburg, Virginia, pp. 24–36.Google Scholar
Welch, J. G. (1967). Appetite control in sheep by indigestible fibers. Journal of Animal Science 26, 849–854.CrossRefGoogle ScholarPubMed