SHORT COMMUNICATION
A new method for recording mastication during eating
and ruminating in sheep
1
Department of Animal and Veterinary Basic Sciences, The Royal Veterinary and Agricultural University,
Bülowsvej 13, DK-1870 Frederiksberg, Denmark
2
Department of Natural Sciences,
The Royal Veterinary and Agricultural University,
Bülowsvej 13, DK-1870 Frederiksberg, Denmar
Publication date: 2004-08-30
Corresponding author
P. Nørgaard
Department of Animal and Veterinary Basic Sciences, The Royal Veterinary and Agricultural University, Bülowsvej 13, DK-1870 Frederiksberg, Denmark
Department of Animal and Veterinary Basic Sciences, The Royal Veterinary and Agricultural University, Bülowsvej 13, DK-1870 Frederiksberg, Denmark
J. Anim. Feed Sci. 2004;13(Suppl. 1):171-174
KEYWORDS
ABSTRACT
A new method for recording jaw movements (JM) oscillations (JMO) in sheep is described. The
principle used to record JMO is the changing position of the magnetic field from a magnet relative
to a small Hall sensor, when both were positioned in a soft tube surrounding the mouth. The signal
was sampled at 20 Hz by a logger hanged in a wheel joint allowing the sheep to move around freely
in a small pen. The individual JM were identified and clustered into cycles. Recorded JMO, JM and
cycles are presented from an ewe eating and ruminating grass silage.
CITATIONS (12):
1.
Evaluation of physical structure value in spring-harvested grass/clover silage and hay fed to heifers
A. K. S. Schulze, P. Nørgaard, M. V. Byskov, M. R. Weisbjerg
animal
A. K. S. Schulze, P. Nørgaard, M. V. Byskov, M. R. Weisbjerg
animal
2.
Effects of chopping grass silage and mixing silage with concentrate on feed intake, dietary selection, chewing activity and faecal particle size of ewes in late pregnancy and early lactation
Carl Helander, Peder Nørgaard, Ali Reza Jalali, Elisabet Nadeau
Livestock Science
Carl Helander, Peder Nørgaard, Ali Reza Jalali, Elisabet Nadeau
Livestock Science
3.
Effects of feeding level and NDF content of grass-clover silages on chewing activity, fecal particle size and NDF digestibility in dairy heifers
A. K. S. Schulze, M. R. Weisbjerg, P. Nørgaard
animal
A. K. S. Schulze, M. R. Weisbjerg, P. Nørgaard
animal
4.
Effect of harvest time of red and white clover silage on chewing activity and particle size distribution in boli, rumen content and faeces in cows
L. F. Kornfelt, P. Nørgaard, M. R. Weisbjerg
animal
L. F. Kornfelt, P. Nørgaard, M. R. Weisbjerg
animal
5.
Effect of feed type and essential oil product on equine chewing activity
C. Brøkner, P. Nørgaard, H. H. Hansen
Journal of Animal Physiology and Animal Nutrition
C. Brøkner, P. Nørgaard, H. H. Hansen
Journal of Animal Physiology and Animal Nutrition
6.
Effects of physical form and stage of maturity at harvest of whole-crop barley silage on intake, chewing activity, diet selection and faecal particle size of dairy steers
B.-O. Rustas, P. Nørgaard, A. R. Jalali, E. Nadeau
animal
B.-O. Rustas, P. Nørgaard, A. R. Jalali, E. Nadeau
animal
7.
Recording rumination time by a rumination monitoring system in Jersey heifers fed grass/clover silage and hay at three feeding levels12
M. V. Byskov, A. K. S. Schulze, M. R. Weisbjerg, B. Markussen, P. Nørgaard
Journal of Animal Science
M. V. Byskov, A. K. S. Schulze, M. R. Weisbjerg, B. Markussen, P. Nørgaard
Journal of Animal Science
8.
Forage fiber effects on particle size reduction, ruminal stratification, and selective retention in heifers fed highly digestible grass/clover silages1
A. K. S. Schulze, M. R. Weisbjerg, A. C. Storm, P. Nørgaard
Journal of Animal Science
A. K. S. Schulze, M. R. Weisbjerg, A. C. Storm, P. Nørgaard
Journal of Animal Science
9.
Effect of harvest time and physical form of alfalfa silage on chewing time and particle size distribution in boli, rumen content and faeces
L. Kornfelt, M. Weisbjerg, P. Nørgaard
animal
L. Kornfelt, M. Weisbjerg, P. Nørgaard
animal
10.
Effect of stage of maturity of grass at harvest on intake, chewing activity and distribution of particle size in faeces from pregnant ewes
A. Jalali, P. Nørgaard, M. Weisbjerg, E. Nadeau
animal
A. Jalali, P. Nørgaard, M. Weisbjerg, E. Nadeau
animal
11.
Mouthing off about fish capture: Jaw movement in pinnipeds reveals the real secrets of ingestion
N. Liebsch, R.P. Wilson, H. Bornemann, D. Adelung, J. Plötz
Deep Sea Research Part II: Topical Studies in Oceanography
N. Liebsch, R.P. Wilson, H. Bornemann, D. Adelung, J. Plötz
Deep Sea Research Part II: Topical Studies in Oceanography
12.
Effect of forage quality on intake, chewing activity, faecal particle size distribution, and digestibility of neutral detergent fibre in sheep, goats, and llamas
A.R. Jalali, P. Nørgaard, M.R. Weisbjerg, M.O. Nielsen
Small Ruminant Research
A.R. Jalali, P. Nørgaard, M.R. Weisbjerg, M.O. Nielsen
Small Ruminant Research
| ISSN: | 1230-1388 |
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