Reference : Effects of age on plasma metabolites and hormones in finishing Belgian Blue double-muscl...
Scientific journals : Article
Life sciences : Animal production & animal husbandry
http://hdl.handle.net/2268/8379
Effects of age on plasma metabolites and hormones in finishing Belgian Blue double-muscled cull females
English
Cabaraux, Jean-François mailto [Université de Liège - ULg > Département de productions animales > Ecologie et éthologie vétérinaires >]
Dufrasne, Isabelle mailto [Université de Liège - ULg > Département de productions animales > Nutrition des animaux domestiques >]
Istasse, Louis mailto [Université de Liège - ULg > Département de productions animales > Nutrition des animaux domestiques >]
Hornick, Jean-Luc mailto [Université de Liège - ULg > Département de productions animales > Nutrition des animaux domestiques >]
2004
Animal Science
British Soc Animal Science
78
Part 2
229-235
Yes (verified by ORBi)
International
1357-7298
Penicuik
[en] Belgian Blue ; cows ; hormones ; metabolites
[en] Two groups of 12 Belgian Blue double-muscled cull females were used successively in a 2-year repeated experiment and divided into three groups according to age, allowing four animals per group each year. The aim of the trial was to relate, during the finishing period, the metabolic and endocrine parameters with age. Females were fattened with a diet based on maize silage and were blood sampled on several occasions. The average daily gain (ADG) decreased with the age of the cows. Plasma glucose and triglycerides decreased also with age while the youngest females showed lower concentrations of urea than those older. The composition of plasma non-esterified fatty acids also differed considerably between groups. The hormones that best related with ADG were IGF-1 and insulin. Plasma concentrations of thyroid hormones were lower in the oldest animals. No difference between groups was found for GH. Heifers presented lower concentrations of GH and IGF-1 than those reported elsewhere in fattening bulls of the same breed. It may be concluded that in Belgian Blue double-muscled females, glucose, IGF-1 and insulin are good indicators of the growth potential. Young adult cows presented intermediate characteristics of metabolic and endocrine status that were close either to younger or to older cows.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/8379

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