References of "Hornick, Jean-Luc"
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See detailEffect of methionine supplementation in the fattening diet of Belgian Blue double muscled cull cows
Cabaraux, Jean-François ULg; Cremer, Véronique; Hornick, Jean-Luc ULg et al

in Book of abstracts of the 51st Annual Meeting of the European Association for Animal Production (2000)

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See detailEffect of energy under- and protein normonutrition in the fattening of Belgian Blue double muscled cull cows
Cremer, Véronique; Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg et al

in Book of abstracts of the 51st Annual Meeting of the European Association for Animal Production (2000)

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See detailEstimation de la composition de la carcasse de vaches de réforme Blanc Bleu à l'engraissement par méthode échographique
Cremer, V.; Hornick, Jean-Luc ULg; Clinquart, Antoine ULg et al

in 6èmes Rencontres Recherches Ruminants (1999)

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See detailGrazing managements with Belgian blue growing bulls before an indoors finishing
Dufrasne, Isabelle ULg; Clinquart, Antoine ULg; Hornick, Jean-Luc ULg et al

in Book of Abstract of the 50th Annual Meeting of the European Association for ANimal Production (1999)

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See detailDifferent periods of feed restriction before compensatory growth in Belgian Blue bulls: II. Plasma metabolites and hormones
Hornick, Jean-Luc ULg; Van Eenaeme, Christian ULg; Diez, Marianne ULg et al

in Journal of Animal Science (1998), 76(1), 260-271

Plasma metabolites and hormones were studied in 16 double-muscled Belgian Blue bulls maintained at low growth (.5 kg/d) for 114 (G2), 243 (G3), or 419 (G4) d (low growth period, LGP) before fattening ... [more ▼]

Plasma metabolites and hormones were studied in 16 double-muscled Belgian Blue bulls maintained at low growth (.5 kg/d) for 114 (G2), 243 (G3), or 419 (G4) d (low growth period, LGP) before fattening (rapid growth period, RGP). Animals from the control group (CG) were fed a diet high in energy and protein. The animals from G2, G3, and G4 were fed a restricted amount of a diet low in energy and protein during LGP and the same diet as CG during RGP. Plasma glucose, alpha-amino nitrogen (AAN), NEFA, urea, creatinine, thyroxine (T4), 3,3',5'-triiodothyronine (T3), and IGF-I were measured in blood samples taken fortnightly. Plasma GH and insulin (I) profiles were measured in serial blood samples obtained at three times during growth. The RGP was characterized by an initial compensatory growth, by higher plasma glucose, AAN, and urea levels, and by lower plasma NEFA and creatinine levels. Plasma GH concentration decreased after refeeding. Plasma T4 increased linearly during refeeding, as opposed to T3, which showed a different profile in each group. Plasma IGF-I showed a curvilinear increase during RGP and reached a plateau after 3 mo in each compensating group. In G4, changes of plasma metabolites and hormones differed often distinctly from G2 or G3. During refeeding, higher nutrient supply improved the functionality of the somatotropic axis and increased the concentration of anabolic hormones, allowing rapid muscle deposition. However, animals underfed the longest period behaved differently from the other groups, possibly because they reached a more complete sexual maturity. [less ▲]

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See detailCompensatory growth in Belgian Blue bulls previously maintained at two growing rates on pasture: animal performance and meat characteristics
Hornick, Jean-Luc ULg; Raskin, Pascale; Clinquart, Antoine ULg et al

in Animal Science (1998), 67(3), 427-434

A comparison was made between finishing systems with Belgian Blue bulls of the double-muscle type, in order to assess the response in terms of compensatory growth when bulls were grazed at a high stocking ... [more ▼]

A comparison was made between finishing systems with Belgian Blue bulls of the double-muscle type, in order to assess the response in terms of compensatory growth when bulls were grazed at a high stocking rate. Two groups of 8 bulls (256.5 kg liveweight) were grazed on Lolium perenne and Trifolium repens pasture during an initial period of 135 days (period I). One group grazed at a stocking rate of 6/ha allowing for normal growth at pasture (NGP); the other group grazed at a stocking rate of 10/ha (low growth at pasture, LGP). Both groups were then finished indoors (period II) with a concentrate based on dried sugarbeet pulp. Eight control bulls were also finished indoors on the concentrate diet during periods I and II (CG). Bulls were slaughtered according to a similar finishing state. Liveweight gains were 1.47, 1.10 and 0.52 kg daily (P<0.001) during period I in CG, NGP and LGP groups respectively. Corresponding liveweight gains during period II were 1.22, 1.37 and 1.50 kg daily. The LGP group had lower feed conversion ratios, slaughter weights (P<0.05) and dressing proportions (P<0.01). The meat from the grazed bulls had lower cooking losses (P<0.05) and tended to have lower drip losses and higher tenderness. It also had a higher cholesterol (P<0.05) content. Large differences were observed in the fatty acid composition according to fat location (subcutaneous, intermuscular or intramuscular). The proportions of mono and polyunsaturated acids increased in the adipose tissue of those previously grazed. [less ▲]

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See detailQuel avenir pour la production de viande de bœuf?
Hornick, Jean-Luc ULg

Scientific conference (1998)

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See detailFeed restriction in young bulls alters the onset of puberty in relationship with plasma insulin-like growth factor-I (IGF-I) and IGF-binding proteins
Portetelle, Daniel ULg; Massart, Serge; Van Eenaeme, Christian ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1998), 2(special issue), 70

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See detailInfluence du caractere culard sur la production et la qualité de la viande des bovins Blanc Bleu Belge
Clinquart, Antoine ULg; Hornick, Jean-Luc ULg; Van Eenaeme, Christian ULg et al

in Productions Animales (1998), 11(4), 285-297

When compared to animals of the dual purpose type in the same breed, Belgian Blue double muscled bulls exhibit, at least, similar average daily gain with lower feed intake. The higher feed efficiency in ... [more ▼]

When compared to animals of the dual purpose type in the same breed, Belgian Blue double muscled bulls exhibit, at least, similar average daily gain with lower feed intake. The higher feed efficiency in the double muscled type is mainly explained by the composition of the weight gains, the muscle content is minimum 60 kg higher and the fat content 30 kg lower than in the dual purpose type when slaughtered at a similar liveweight. In both types, the dressing percentage and the lean meat proportion in the carcass increase with final liveweight.The chemical composition and the sensory characteristics of meat are also influenced by double muscling. The fat content is reduced and the polyunsaturated fatty acids proportion is increased in the double muscled type, resulting in a nutritional advantage. The difference in sensory characteristics could be, only partially, explained by the faster post mortem pH drop. The paler meat is mainly related to the myoglobin content. The advantage of the double muscled type in terms of tenderness, due to a low collagen content, is not exhibited in a "choice" cut of the carcass with a low level of collagen. Finally, according to most of the available data, the water holding capacity of meat of double muscled animals seems not very different.The concentrations of several blood metabolites indicate a partition of the absorbed nutrients propitious to protein deposition and unpropitious to fat deposition in double muscled animals. During the fattening period, this specific partition can be related to endocrine characteristics, mainly growth hormone and insulin. [less ▲]

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See detailEffects of a dietary vitamin E supplementation on performance and meat characteristics in fattening bulls from the Belgian Blue breed
Dufrasne, Isabelle ULg; Marche, Christian; Clinquart, Antoine ULg et al

in Livestock Production Science (1998), 65(1/2), 197-201

An experiment was conducted to study effects of dietary vitamin E supplementation on animal performance, slaughter characteristics and meat quality traits in Belgian Blue double-muscled bulls. Two groups ... [more ▼]

An experiment was conducted to study effects of dietary vitamin E supplementation on animal performance, slaughter characteristics and meat quality traits in Belgian Blue double-muscled bulls. Two groups of six bulls each (404 kg) were offered (close to ad libitum) a fattening diet based on sugar beet pulp for 154 days, at which time they were slaughtered. The diet given to the control group (CG) contained 12.5 mg vitamin E/kg concentrate. The vitamin E-treated group (VG) received the same concentrate plus a supplement of 1000 mg vitamin E per bull daily. Steaks from m. longissimus thoracis were used to determine meat quality characteristics, α tocopherol concentration and thiobarbituric acid reactive substances content (TBARS), an indicator of oxidation rancidity. Supplementation had no influence on performance or carcass characteristics. The main findings were that vitamin E doubled the muscle alpha tocopherol level (1.9 vs. 0.9 mg/kg; P<0.001), lipid oxidation was suppressed as indicated by TBARS values (P<0.01 at days 7, 9, 11 and 14 after slaughter), but muscle colour was not significantly affected although a* (redness) tended to be higher for VG. [less ▲]

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See detailThe influence of sugar-beet fibre, guar gum and inulin on nutrient digestibility, water consumption and plasma metabolites in healthy Beagle dogs.
Diez, Marianne ULg; Hornick, Jean-Luc ULg; Baldwin, Paule ULg et al

in Research in Veterinary Science (1998), 64(2), 91-6

The aim of the present study was to evaluate the effects of three fibres (sugar-beet fibre, guar gum and inulin) incorporated in the basal diet of healthy dogs at 7 per cent of dry matter (DM). Parameters ... [more ▼]

The aim of the present study was to evaluate the effects of three fibres (sugar-beet fibre, guar gum and inulin) incorporated in the basal diet of healthy dogs at 7 per cent of dry matter (DM). Parameters examined included stool output, water consumption, nutrient digestibility and fasting and postprandial plasma metabolites. All fibres increased wet faecal output; an increase in faecal DM output being observed with sugar-beet fibre only. Sugar-beet fibre and inulin increased daily water consumption. Sugar-beet fibre and guar gum decreased DM digestibility. The three fibres diminished organic matter and crude protein digestibility while ether extract digestibility was decreased by guar gum and inulin. Guar gum induced lower postprandial insulin, alpha-amino-nitrogen and urea plasma concentrations. Guar gum also lowered fasting cholesterolaemia. Sugar-beet fibre and inulin showed no metabolic effects. These physiological properties suggest that guar gum would be a suitable ingredient for dietary therapy of chronic diseases such as diabetes mellitus or hyperlipidaemia in the dog. [less ▲]

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See detailEffect of energy under- and protein overnutrition on meat deposition in cull cows
Van Eenaeme, Christian ULg; Hornick, Jean-Luc ULg; Raskin, Pascale et al

in Book of abstracts of the 49th annual meeting of the European association for animal production (1998)

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See detailEffect of age, feeding level and supplementation with methionine on plasma GH, IGF-1, T3 and T4 concentrations in Belgian Blue double muscled fattening females
Hornick, Jean-Luc ULg; Van Eenaeme, Christian ULg; Evrard, Pierre et al

in Symposium on growth in ruminants: basic aspects, theory and practice for the future (1998)

Detailed reference viewed: 10 (2 ULg)