References of "Evrard, Pierre"
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See detailGrowth, body development and reproduction in Belgian Blue cattle as influenced by management
Evrard, Pierre; de Behr, Vanessa; 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)

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See detailAnimal performance, plasma hormones and metabolites in Holstein and Belgian Blue growing-fattening bulls.
Istasse, Louis ULg; Van Eenaeme, Christian ULg; Evrard, Pierre et al

in Journal of Animal Science (1990), 68(9), 2666-73

Six Holstein (light-muscled type) and six Belgian Blue bulls (double-muscled type) were fed a finishing diet. Average daily gain was 1.36 kg for the Holstein bulls vs 1.24 kg for the Belgian Blue bulls (P ... [more ▼]

Six Holstein (light-muscled type) and six Belgian Blue bulls (double-muscled type) were fed a finishing diet. Average daily gain was 1.36 kg for the Holstein bulls vs 1.24 kg for the Belgian Blue bulls (P less than .05). Holstein bulls consumed more feed (2.3 vs 1.8 kg/100 kg body weight, P less than .001) than the Belgian Blue bulls. The dressing percentage (55.4 vs 65.8%, P less than .001) and the proportion of muscle (56.1 vs 71.3%, P less than .001) in the carcass were less, whereas the proportions of adipose tissue (28.3 vs 15.4%, P less than .001) and bone (15.7 vs 13.4%, P less than .05) were higher in the Holstein bulls. Plasma creatinine determined in samples obtained once a week was lower (11.0 vs 20.3 mg/liter, P less than .001) in the Holstein bulls. In contrast, Holstein bulls tended to produce more triiodothyronine (2.3 vs 1.8 nM, P less than .10), tetraiodothyronine (71.9 vs 54.7 nM, P less than .10) and insulin-like growth factor I (IGF-I; 340 vs 205 ng/ml, P less than .20) than the Belgian Blue bulls. Growth hormone, insulin, IGF-I and testosterone were measured at 20-min intervals during two 24-h periods. In wk 6, Holstein bulls tended to produce more growth hormone than the Belgian Blues, as indicated by higher total peak area (3,185 vs 2,431 ng), peak amplitude (34.1 vs 22.6 ng/ml, P less than .10) and baseline (4.6 vs 3.3 ng/ml, P less than .20). In wk 27, the trends were opposite.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

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See detailEffect of trenbolone acetate associated with 17á-oestradiol on reproductive performances of young growing fattening bulls
Istasse, Louis ULg; Evrard, Pierre; Hanzen, Christian ULg et al

in Journal of Animal Physiology & Animal Nutrition (1988), 59

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See detailTrenbolone acetate in combination with 17 beta-estradiol: influence of implant supports and dose levels on animal performance and plasma metabolites.
Istasse, Louis ULg; Evrard, Pierre; Van Eenaeme, Christian ULg et al

in Journal of Animal Science (1988), 66(5), 1212-22

Twelve (Exp. 1) and 24 (Exp. 2) young growing bulls were used to compare the effects of long-acting, cholesterol-based implants with short-acting, lactose-based implants. Each implant contained 200 mg of ... [more ▼]

Twelve (Exp. 1) and 24 (Exp. 2) young growing bulls were used to compare the effects of long-acting, cholesterol-based implants with short-acting, lactose-based implants. Each implant contained 200 mg of trenbolone acetate and 40 mg of 17 beta-estradiol. The long-acting, cholesterol-based implants were applied once either 18 wk (early implantation) or 12 wk (late implantation) before slaughter. The lactose-based pellets were implanted once (6 wk before slaughter), twice (12 and 6 wk) or three times (18, 12 and 6 wk) before slaughter. Treated animals had higher live weight gains, a lower feed conversion ratio, a higher proportion of lean meat and a lower proportion of adipose tissue than control animals. In Exp. 1 live weight gain of bulls implanted early with a single cholesterol-based implant was similar to the gain of animals treated three times with a lactose-based implant, but in Exp. 2 the effects of the long-acting implants given early were not sustained. In Exp. 3, 24 young growing bulls were used in a 3 X 2 factorial design to compare the effects of three dose levels of trenbolone acetate (100, 200 and 300 mg) and two levels of 17 beta-estradiol (40 and 60 mg). There were no significant differences between treatment groups, but highest live weight gains were observed in animals implanted with 300 mg of trenbolone and 60 mg of estradiol. This group also yielded the highest proportion of lean meat and the lowest proportion of adipose tissue. There was a decrease in plasma urea concentration after each implantation. It appeared also that plasma trenbolone was higher with implants containing 60 mg of estradiol. There were no differences between groups in growth hormone response to arginine stimulation. [less ▲]

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See detailEffect of trenbolone acetate associated with 17ß-oestradiol on reproductive performances of young growing fattening bulls
Istasse, Louis ULg; Evrard, Pierre; Coignoul, Freddy ULg et al

in Journal of Animal Physiology & Animal Nutrition (1988), 59

Bulls were implanted with an ear pellet of trenbolone acetate and oestradiol in association. Some treated bulls produced a sperm without spermatozoa but there were no significant differences in ... [more ▼]

Bulls were implanted with an ear pellet of trenbolone acetate and oestradiol in association. Some treated bulls produced a sperm without spermatozoa but there were no significant differences in spermatozoa concentration and sperm quality between treated animals which produced a sperm with spermatozoa and control bulls. The scrotal circumference of the treated animals did not change over the experimental period while that of control bulls regularly increased. After a dynamic stimuation with luteinzing hormone releasing hormone, the luteinizing hormone concentrations did not change in the treated animals and the testosterone kinetic profiles were characterized by a low basal concentration and small peak heights. The microscopic evaluation of the testicles indicated a reduction in the percentage of seminiferous tubules with mature spermatozoa and a reduction in the number of Leydig cells in the islets. [less ▲]

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