The relationship between appetite and plasma non-esterified fatty acid levels in housed calves.
Vet Res Commun
; 15(2): 127-33, 1991.
Article
em En
| MEDLINE
| ID: mdl-2068796
ABSTRACT
Non-esterified fatty acid (NEFA) levels in housed, 3-month-old calves were monitored in two experiments designed to establish (i) the effect of diet and time of sampling in relation to feeding on blood levels; and (ii) the relationship between appetite and plasma NEFA in animals on chopped hay. In the first experiment, a significant drop in NEFA levels was recorded after feeding. Furthermore, the NEFA levels of calves maintained on concentrate were significantly lower than those on hay throughout the post-feeding period. In the second study, a significant negative correlation was established between NEFA levels and intake of chopped hay in (i) ad-lib-fed calves infected with the abomasal nematode Ostertagia ostertagi; (ii) worm-free animals pair-fed with those in group (i); and (iii) ad-lib-fed worm-free calves. Regression analysis of raw and transformed data from all three groups combined also yielded significant correlations. It is suggested that the measurement of blood NEFA may be a useful indirect indicator of feed intake in conditioned housed calves offered hay diets.
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Base de dados:
MEDLINE
Assunto principal:
Apetite
/
Bovinos
/
Ácidos Graxos não Esterificados
Idioma:
En
Ano de publicação:
1991
Tipo de documento:
Article