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The effects of monensin on the pool size and turnover rate of protozoa in the rumen of sheep

Published online by Cambridge University Press:  27 March 2009

R. A. Leng ,
J. V. Nolan ,
G. Cumming ,
S. R. Edwards  and
C. A. Graham
R. A. Leng
Affiliation:
Department of Biochemistry and Nutrition, University of New England, Armidale 2351, Australia
J. V. Nolan
Affiliation:
Department of Biochemistry and Nutrition, University of New England, Armidale 2351, Australia
G. Cumming
Affiliation:
I.C.I. Australia Pty Ltd, Merrindale Research Station, P.O. Box 141, Croydon 3136, Australia
S. R. Edwards
Affiliation:
I.C.I. Australia Pty Ltd, Merrindale Research Station, P.O. Box 141, Croydon 3136, Australia
C. A. Graham
Affiliation:
I.C.I. Australia Pty Ltd, Merrindale Research Station, P.O. Box 141, Croydon 3136, Australia
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Summary

The effects of including monensin in the diet on the dynamics of protozoa in the rumen of sheep were investigated using injections of protozoa labelled with 14C-choline.

The half time of rumen fluid was higher in sheep receiving monensin but neither the pool size nor the composition of protozoa species (mainly smaller entodiniomorph ciliates) was significantly affected.

More protozoa passed out of the rumen as liquid outflow rate increased and there was a tendency for the apparent production rate of protozoa to be higher with the resulting increase in washout of protozoa.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 102 , Issue 3 , June 1984 , pp. 609 - 613
Copyright
Copyright © Cambridge University Press 1984

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