Effect of defaunation on utilisation of poor quality tropical feed by sheep
There are conflicting Reports in the literature about the benefits of defaunation, the removal of ciliate protozoa from the rumen, in ruminant production. Ciliate protozoa are not essential for proper functioning of the rumen nor for the life of the host and that their contribution to microbial prot...
| Autores principales: | , , , , |
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| Formato: | Conference Paper |
| Lenguaje: | Inglés |
| Publicado: |
British Society of Animal Science
1999
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/50433 |
| _version_ | 1855531176905670656 |
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| author | Teferedegne, B. Osuji, P.O. Odenyo, A.A. Wallace, R.J. Newbold, C.J. |
| author_browse | Newbold, C.J. Odenyo, A.A. Osuji, P.O. Teferedegne, B. Wallace, R.J. |
| author_facet | Teferedegne, B. Osuji, P.O. Odenyo, A.A. Wallace, R.J. Newbold, C.J. |
| author_sort | Teferedegne, B. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | There are conflicting Reports in the literature about the benefits of defaunation, the removal of ciliate protozoa from the rumen, in ruminant production. Ciliate protozoa are not essential for proper functioning of the rumen nor for the life of the host and that their contribution to microbial protein flowing to the lower gut is small (Williams and Coleman, 1992). Protozoa ingest and digest bacteria in the rumen decreasing the flow of microbial protein from the rumen, and inserting an energy wasting step in the net synthesis of bacterial protein in the rumen (Williams and Coleman, 1992). However, protozoa also play an active role in ruminal fibre digestion and up to 50 percent of ruminal carboxymethylcellulase activity is associated with the protozoal fraction (Williams and Colemans, 1992). Thus the effect of defaunation on animal productivity will be a balance between the increase in the supply of microbial protein leaving the rumen and any decrease in ruminal fibre digestion. The aim of this work was to determine the effect of defaunation on microbial protein supply and fibre digestion in sheep fed a poor quality tropical diet. |
| format | Conference Paper |
| id | CGSpace50433 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1999 |
| publishDateRange | 1999 |
| publishDateSort | 1999 |
| publisher | British Society of Animal Science |
| publisherStr | British Society of Animal Science |
| record_format | dspace |
| spelling | CGSpace504332016-05-30T17:53:03Z Effect of defaunation on utilisation of poor quality tropical feed by sheep Teferedegne, B. Osuji, P.O. Odenyo, A.A. Wallace, R.J. Newbold, C.J. sheep ciliophora protozoa feed quality feed conversion efficiency rumen digestibility degradation hay There are conflicting Reports in the literature about the benefits of defaunation, the removal of ciliate protozoa from the rumen, in ruminant production. Ciliate protozoa are not essential for proper functioning of the rumen nor for the life of the host and that their contribution to microbial protein flowing to the lower gut is small (Williams and Coleman, 1992). Protozoa ingest and digest bacteria in the rumen decreasing the flow of microbial protein from the rumen, and inserting an energy wasting step in the net synthesis of bacterial protein in the rumen (Williams and Coleman, 1992). However, protozoa also play an active role in ruminal fibre digestion and up to 50 percent of ruminal carboxymethylcellulase activity is associated with the protozoal fraction (Williams and Colemans, 1992). Thus the effect of defaunation on animal productivity will be a balance between the increase in the supply of microbial protein leaving the rumen and any decrease in ruminal fibre digestion. The aim of this work was to determine the effect of defaunation on microbial protein supply and fibre digestion in sheep fed a poor quality tropical diet. 1999 2014-10-31T06:09:13Z 2014-10-31T06:09:13Z Conference Paper https://hdl.handle.net/10568/50433 en Limited Access British Society of Animal Science |
| spellingShingle | sheep ciliophora protozoa feed quality feed conversion efficiency rumen digestibility degradation hay Teferedegne, B. Osuji, P.O. Odenyo, A.A. Wallace, R.J. Newbold, C.J. Effect of defaunation on utilisation of poor quality tropical feed by sheep |
| title | Effect of defaunation on utilisation of poor quality tropical feed by sheep |
| title_full | Effect of defaunation on utilisation of poor quality tropical feed by sheep |
| title_fullStr | Effect of defaunation on utilisation of poor quality tropical feed by sheep |
| title_full_unstemmed | Effect of defaunation on utilisation of poor quality tropical feed by sheep |
| title_short | Effect of defaunation on utilisation of poor quality tropical feed by sheep |
| title_sort | effect of defaunation on utilisation of poor quality tropical feed by sheep |
| topic | sheep ciliophora protozoa feed quality feed conversion efficiency rumen digestibility degradation hay |
| url | https://hdl.handle.net/10568/50433 |
| work_keys_str_mv | AT teferedegneb effectofdefaunationonutilisationofpoorqualitytropicalfeedbysheep AT osujipo effectofdefaunationonutilisationofpoorqualitytropicalfeedbysheep AT odenyoaa effectofdefaunationonutilisationofpoorqualitytropicalfeedbysheep AT wallacerj effectofdefaunationonutilisationofpoorqualitytropicalfeedbysheep AT newboldcj effectofdefaunationonutilisationofpoorqualitytropicalfeedbysheep |