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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
13/02/1997 |
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Data da última atualização: |
13/02/1997 |
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Autoria: |
LITTLE, D. A.; MORRIS, J. G. |
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Afiliação: |
C.S.I.R.O. Division of Animal Physiology, Cunningham Laboratory, Mill Road, St Lucia, Queensland. Animal Research Institute, Yeerongpilly. |
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Título: |
Prediction of the body composition of live cattle. |
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Ano de publicação: |
1972 |
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Fonte/Imprenta: |
Journal of Agricultural Science, v.78, p.505-508, 1972. |
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Idioma: |
Inglês |
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Conteúdo: |
Two methods of determining body composition in live cattle have been compared with the composition of the cattle as determined by chemical analysis. Total body water (TBW) was estimated from tritiated water (TOH) dilution, and circulating red cell volume (RCV) estimated from measurements of plasma volume and haematocrit. TBW was very closely related to fat-free weight and fat weight as a percentage of live weight (LW) in eight cattle ranging from 3 to 34% fat. TOH space was more precise than RCV in the estimation of the various chemical fractions of the animal. TOH injected intravenously equilibrated with ruminal water in 8-10 h; one could be confident that equilibrium had occurred 10 h after injection, and equilibration time was not affected by previous restriction of feed and water. The mean biological half life of TOH was 4.2+-0.4 days. Equations are presented for the practical determination of the various compartments. |
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Palavras-Chave: |
Composicao do corpo; Prediccao. |
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Thesagro: |
Análise Química; Gado. |
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Thesaurus Nal: |
body composition; cattle; chemical analysis; prediction. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01529naa a2200229 a 4500
001 1790545
005 1997-02-13
008 1972 bl --- 0-- u #d
100 1 $aLITTLE, D. A.
245 $aPrediction of the body composition of live cattle.
260 $c1972
520 $aTwo methods of determining body composition in live cattle have been compared with the composition of the cattle as determined by chemical analysis. Total body water (TBW) was estimated from tritiated water (TOH) dilution, and circulating red cell volume (RCV) estimated from measurements of plasma volume and haematocrit. TBW was very closely related to fat-free weight and fat weight as a percentage of live weight (LW) in eight cattle ranging from 3 to 34% fat. TOH space was more precise than RCV in the estimation of the various chemical fractions of the animal. TOH injected intravenously equilibrated with ruminal water in 8-10 h; one could be confident that equilibrium had occurred 10 h after injection, and equilibration time was not affected by previous restriction of feed and water. The mean biological half life of TOH was 4.2+-0.4 days. Equations are presented for the practical determination of the various compartments.
650 $abody composition
650 $acattle
650 $achemical analysis
650 $aprediction
650 $aAnálise Química
650 $aGado
653 $aComposicao do corpo
653 $aPrediccao
700 1 $aMORRIS, J. G.
773 $tJournal of Agricultural Science$gv.78, p.505-508, 1972.
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Registro original: |
Embrapa Pantanal (CPAP) |
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