References of "Leroy, Pascal"
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See detailEffect of somatic growth, strain and sex on double-chamber plethysmographic respiratory function values in healthy mice
Flandre, Thierry; Leroy, Pascal ULg; Desmecht, Daniel ULg

in Journal of Applied Physiology (2003), 94

Double-chamber plethysmography has been recognized since 1979 as a reference technique to measure pulmonary function values in guinea pigs, but it has not gained attention for use in mice. Theoretically ... [more ▼]

Double-chamber plethysmography has been recognized since 1979 as a reference technique to measure pulmonary function values in guinea pigs, but it has not gained attention for use in mice. Theoretically, however, this technique combines the advantages of single-chamber plethysmography with a quantitative assessment of flow and/or volume and a calculated resistance, the interpretation of which in terms of bronchoconstriction is not disputed. Here we show that, when appropriately preconditioned, mice are able to gradually grow accustomed to the apparatus and display extremely stable nasal and thoracoabdominal flow tracings. Overall, strain, sex, and somatic growth had a significant effect on pulmonary function values. The changes in specific airway resistance (sRaw) and enhanced pause (Penh) values were never in the same direction, indicating that they measure different things. The respiratory frequency was far higher in C57BL/6 compared with BALB/c mice. Peak flows, minute volume, specific tidal and minute volumes, and sRaw were also higher, but Penh was smaller. Males breathed at a higher frequency than females, leading to a higher minute volume. Nevertheless, the specific volumes were considerably higher among females. Penh was lower in males, whereas sRaw was identical in both sexes. Changes associated with somatic growth were rapid and important between 5 and 9 wk, then slowed down between 9 and 12-13 wk and became almost imperceptible after. [less ▲]

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See detailPrédiction de la composition de la carcasse et de la qualité de viande du Piétrain stress négatif par ultrasonographie en temps réel
Youssao, A. K. I.; Verleyen, Vincent ULg; Michaux, Charles ULg et al

in Annales de Médecine Vétérinaire (2003), 147(6), 403-410

The lean meat proportion and longissimus thoracis intramuscular fat percentage were predicted in negative-stress Pietrain pigs by real-time ultrasound using Pie Medical 200. The optimal probing site for ... [more ▼]

The lean meat proportion and longissimus thoracis intramuscular fat percentage were predicted in negative-stress Pietrain pigs by real-time ultrasound using Pie Medical 200. The optimal probing site for the estimation of carcass lean content percentage was first identified. The models for the prediction of carcass lean content proportion by ultrasound measurement were developed. Comparisons between Fat Lean Meter, ultrasonic device Piglog 105 and Pie Medical 200 were made for lean meat proportion estimation in Pietrain carcasses. The intramuscular fat percentage was predicted from the white pixel percentage in the longissimus thoracis ultrasound image [less ▲]

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See detailLa filière Porc Fleuri : vers une appellation d'origine protégée
Berti, Fabio ULg; Beduin, Jean-Marie ULg; Verleyen, Vincent ULg et al

in Huitième Carrefour des Productions animales "L'avenir des filières de qualité différenciées" (2003)

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See detailEvaluation par ultrasonographie en temps réel de la teneur en gras intramusculaire du porc Piétrain
Youssao, A. K. I.; Verleyen, Vincent ULg; Michaux, Charles ULg et al

in Annales de Médecine Vétérinaire (2002), 146(4), 249-255

Real-time ultrasound data collection, consisting specifically of longissimus thoracis muscle echogenicity, was carried out on 80 Pietrain pigs (42 gilts and 34 barrows) using the Pie Medical scanner 200 ... [more ▼]

Real-time ultrasound data collection, consisting specifically of longissimus thoracis muscle echogenicity, was carried out on 80 Pietrain pigs (42 gilts and 34 barrows) using the Pie Medical scanner 200 equipped with an ASP-18 probe and 3.5 MHz to predict intramuscular fat. Two ribs thickness (12th and 13th ribs) was excised from the longissimus thoracis muscle for subsequent ether extract value (EE) determination. The percentage of white pixels in the ultrasound image were related to EE percentage. The EE percentages were 1.44, 1.37 and 1.15 % respectively for the homozygous stress-negative Pietrain (CC), heterozygous stress-negative Pietrain (CT) and homozygous stress-positive Pietrain (TT) individuals. The percentage of white pixels in the longissimus thoracis images were 9.98, 8.75 and 7.79 % respectively for CC, CT and TT genotypes. The barrows had an higher intramuscular fat and white pixel percentage than the gilts. The determination coefficient (R 2) of the EE prediction model originating from the white pixels percentage was 0.35 with a root mean squared error of 0.26 %. These performance could be potentially improved using the calibration phantom of the ASP-18 probe, before taking images. [less ▲]

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See detailAmélioration des ovins dans l'Ouémé et le Plateau en République du Bénin. Enjeux des croisements des ovins Djallonké avec les moutons du Sahel
Gbangboche, A. B.; Abiola, F. A.; Laporte, J.-P. et al

in Tropicultura (2002), 20(2), 70-75

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See detailPepsinogen and progesterone concentration during pregnancy in sows.
Banga-Mboko, H.; Thilman, P.; Desbuleux, H. et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2002), 6(1), 12-13

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See detailChoice of probing site for estimation of carcass lean percentage in Piétrain pig using the real-time ultrasound
Youssao, A. K. L.; Verleyen, Vincent ULg; Michaux, Charles ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2002), 6(4), 195-200

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See detailLa conformation bouchère des agneaux. Etude d'après la variabilité génétique entre races
Laville, E.; Bouix, J.; Sayd, T. et al

in INRA Productions Animales (2002), 15(1), 53-66

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See detailEvaluation de la composition de la carcasse et de la qualité de la viande par ultrasonographie chez le porc
Youssao, A. K. L.; Verleyen, Vincent ULg; Leroy, Pascal ULg

in Annales de Médecine Vétérinaire (2002), 146(1), 19-29

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See detailComposition de la carcasse, qualité de viande et exploitation du Piétrain stress négatif
Youssao, A. K. L.; Verleyen, Vincent ULg; Michaux, Charles ULg et al

in Annales de Médecine Vétérinaire (2002), 146(6), 329-338

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See detailPrediction of carcass lean content by real-time ultrasound in Piétrain and negative stress Piétrain
Youssao, A. K. L.; Verleyen, Vincent ULg; Leroy, Pascal ULg

in Animal Science (2002), 75

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See detailJuvenile interphalangeal degenerative joint disease in the ardenner horse: morphometrical evaluation's protocol (part I)
Lejeune, Jean-Philippe ULg; Schneider, Nicole ULg; Duvivier, Dominique Hannia et al

in Annales de Médecine Vétérinaire (2002), 146(2, APR-MAY), 113-120

The observation of a high incidence of juvenile interphalangeal degenerative joint disease in ardenner horses motivated the constitution of a research project at the "Centre Europeen du Cheval de Mont-le ... [more ▼]

The observation of a high incidence of juvenile interphalangeal degenerative joint disease in ardenner horses motivated the constitution of a research project at the "Centre Europeen du Cheval de Mont-le-Soie" (Belgium). Its aim is to study the morphology of the horse, the conformation of its limbs as well as the potential outbreak and evolution of osteoarthritic lesions. Therefore an investigation method composed of morphometric and radiographic evaluation's protocols has been established. The morphometric evaluation's protocol presented here enables to characterise first the general morphology of the horse and second the foot, his asymmetries and his connections with the ground. This protocol is applied to 32 ardenner foals of 250 21 days of age. This group represents 9.3% of the births registered during the year 2000. For general morphometry, different values of the parameters are observed in this group. Only the higher size of the males makes the difference between the two populations (males and females) at this age. The morphometric study of the foot points out a widening of the external part of the hoof and an angle foot/ground too high in comparison with the established standards. Asymmetrical heights of hoof's quarters are also observed. [less ▲]

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See detailProfils de la progestérone des vaches zébu ‘Azawak’ et taurin ‘Gourunsi’ après induction de l’œstrus aux progestagènes combinés à la prostaglandine
Zongo, M.; Pitala, W.; Boly, H. et al

in Tropicultura (2001), 19(3), 131-134

Un dosage radioimmunologique a été utilisé pour mesurer les concentrations de progestérone chez les zébus “Azawak” (Bos indicus, n = 6) et taurins Gourunsi (Bos taurus, n = 5) après induction de l'œstrus ... [more ▼]

Un dosage radioimmunologique a été utilisé pour mesurer les concentrations de progestérone chez les zébus “Azawak” (Bos indicus, n = 6) et taurins Gourunsi (Bos taurus, n = 5) après induction de l'œstrus. Les observations ont été menées sur 11 vaches non gestantes (groupe I composé de 3 zébus Azawak et 3 taurins Gourunsi; groupe II composé de 3 zébus Azawak et 2 taurins Gourunsi), soumises à un traitement hormonal reposant sur l’administration d’un implant de progestagène, d’une injection de prostaglandine F2alpha et, pour une partie des femelles (groupe I), d’une injection de PMSG. Les implants ont été placés sous la peau de la face externe de l’oreille et maintenus pendant une période de 10 jours. Au 8e jour du traitement, les femelles ont reçu une injection intramusculaire de prostaglandine F2 (5 mg/100 kg) et au 10e jour, au moment du retrait, une injection de PMSG (400 UI/300 kg de poids vif) a été pratiquée sur les animaux du groupe I. Chez les taurins Gourunsi et chez les zébus Azawak ayant reçu l’injection de PMSG, le traitement a été suivi d’un œstrus dans 2 cas sur 3. Chez les animaux appartenant au groupe II, l’œstrus ne fut observé chez aucun taurin et seulement chez 1 des 3 zébus. Les concentrations de progestérone mesurées au cours des phases lutéales qui ont suivi sont restées faibles chez les taurins Gourunsi. Chez les zébus Azawak, les concentrations se sont révélées plus élévées chez les femelles ayant reçu l’injection de PMSG (6,0 +/- 1,2 ng/ml) que chez celles qui n’avaient pas reçu (3,2 +/- 0,8 ng/ml). [less ▲]

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See detailInsémination artificielle des vaches ‘Azawak’ et taurin ‘Gourunsi’ au Burkina Faso
Zongo, M.; Boly, H.; Sawadogo, L. et al

in Tropicultura (2001), 19(2), 75-78

La synchronisation des chaleurs et la fertilité en insémination artificielle des zébus ‘Azawak’ (Bos indicus, n = 66) et des taurins ‘Gourunsi’ (Bos taurus, n = 20) ont été appréciées en zone périurbaine ... [more ▼]

La synchronisation des chaleurs et la fertilité en insémination artificielle des zébus ‘Azawak’ (Bos indicus, n = 66) et des taurins ‘Gourunsi’ (Bos taurus, n = 20) ont été appréciées en zone périurbaine soudano-sahélienne de Ouagadougou au Burkina Faso. La synchronisation a été effectuée avec des implants sous cutanés de progestagène placés sous la peau de l’oreille pendant 10 jours. Le traitement a été complété par l’injection de prostaglandine F2 et de PMSG, respectivement au 8ième et au 10ième jours de la pose de l’implant. Le taux d’œstrus induits observés par l’éleveur était de 94,2% dans les 48 heures qui suivaient le retrait de l'implant. Il variait significativement (P<0,05) selon les groupes zébus ‘Azawak’ et taurins ‘Gourunsi’ (100% et 75%, respectivement). Les taux de fertilité, déterminés par palpation rectale chez les zébus ‘Azawak’ et les taurins ‘Gourunsi’, ont été respectivement 24,2% et 10%. La fertilité a varié selon le moment de l’insémination: lorsque les femelles étaient inséminées 36 à 48 heures après le retrait de l’implant, les taux de fertilité ont été faibles (0 à 12,5% chez les taurins ‘Gourunsi’ et les zébus ‘Azawak’, respectivement). Par ailleurs, lorsque les inséminations étaient réalisées 24 à 36 heures après le retrait de l’implant, les taux de fertilité ont été respectivement de 50% et 42,3%. [less ▲]

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See detailL'élevage du "mouton de case" : aspects techniques, socio-économiques et perspectives d'amélioration au Yatenga (Burkina Faso)
Hamidou, B.; Ilboudo, J.-B.; Ouedraogo, M. et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2001), 5(4), 201-208

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See detailSpirometric performance in Belgian Blue calves: I. Effects on economic losses due to the bovine respiratory disease complex.
Bureau, Fabrice ULg; Detilleux, Johann ULg; Dorts, T. et al

in Journal of Animal Science (2001), 79(5), 1301-1304

The aim of this study was to determine whether high spirometric performances in calves are associated with low economic losses due to the bovine respiratory disease complex (BRDC). Five spirometric ... [more ▼]

The aim of this study was to determine whether high spirometric performances in calves are associated with low economic losses due to the bovine respiratory disease complex (BRDC). Five spirometric variables (SV) were measured in 909 double-muscled Belgian Blue calves from 15 to 60 d of age. Afterward, calves were monitored for 6 mo to determine whether they developed BRDC and to determine the costs due to BRDC (i.e., medicine costs and veterinarians' fees, plus estimated financial losses due to mortality in case of death). To analyze the effects of spirometric performances on BRDC cost, a fixed linear model was used for each SV. In addition to SV, each model included the effects of sex, dam's parity, vaccination status, muscular development score, herd-period, and BW. Only herd-period and the maximal ventilation and the vital capacity had significant effects on costs due to BRDC, indicating that these two SV are major physiological determinants of economic losses associated with BRDC. Accordingly, it is assumed that an amelioration of maximal ventilation and vital capacity could result in increased resistance to BRDC in calves. [less ▲]

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See detailSpirometric performance in Belgian Blue calves: II. Analysis of environmental factors and estimation of genetic parameters.
Bureau, Fabrice ULg; Michaux, C.; Coghe, J. et al

in Journal of Animal Science (2001), 79(5), 1162-1165

Genetic parameters and environmental effects for spirometric variables (SV) in calves were estimated using 734 Belgian Blue calves (15 to 297 d of age), sired by 20 AI bulls. For each calf, the following ... [more ▼]

Genetic parameters and environmental effects for spirometric variables (SV) in calves were estimated using 734 Belgian Blue calves (15 to 297 d of age), sired by 20 AI bulls. For each calf, the following SV were measured: 1) the average ventilation (l/min) recorded during the 15 s of maximal ventilatory changes induced by lobeline administration (0.25 mg/kg, i.v.) (15-s MV(L)); 2) the vital capacity, and the maximal peak expiratory and inspiratory flows recorded after lobeline administration; and 3) the ventilatory reserve (15-s MV(L) - ventilation at rest). Analysis of environmental factors showed age of calf, herd, sex, and vaccination status had significant effects on SV. A sire model and a multiple-trait derivative-free REML procedure were used to estimate genetic parameters for SV, body weight, and muscling score. Heritabilities for SV ranged from 0.28 +/- 0.11 to 0.44 +/- 0.16. Genetic correlations among SV varied from 0.76 to 0.98 and environmental correlations from 0.69 to 0.80. Genetic correlations of SV with body weight (0.25 to 0.56) and with muscling score (0.21 to 0.76) were positive, as were environmental correlations of SV with body weight (0.44 to 0.70) and muscling score (0.09 to 0.25). These results suggest that selection may improve SV without impairing other traits of economic importance. [less ▲]

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See detailLa capacité ventilatoire des veaux Blanc-Bleu Belges : relation avec la résistance aux pathologies respiratoires
Jacqmot, Olivier ULg; Bureau, Fabrice ULg; Dorts, T. et al

in Sixième Carrefour des Productions Animales : La Sélection Animale au Service de la Société (2001)

Les performances spirométriques ont un effet sur la morbidité, la mortalité et le coût des maladies respiratoires dans l'espèce bovine. Les veaux Blanc-Bleu Belge se distinguant des autres par de ... [more ▼]

Les performances spirométriques ont un effet sur la morbidité, la mortalité et le coût des maladies respiratoires dans l'espèce bovine. Les veaux Blanc-Bleu Belge se distinguant des autres par de meilleures performances spirométriques sont avantagés du point de vue fonctionnel respiratoire; ils sont plus résistants aux pathologies respiratoires. Parmi les variables, ce sont la capacité ventilatoire et la ventilation maximale qui sont les plus importantes pour améliorer la résistance aux maladies respiratoires. Ces variables sont héritables et cela sans diminution du gain de poids ni du développement musculaire de ces animaux [less ▲]

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See detailLes attentes des consommateurs, des nouveaux critères de sélection porcine
Leroy, Pascal ULg; Verleyen, Vincent ULg; Beduin, J.-M. et al

in Carrefour des productions animales, Gembloux 2001 (2001)

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See detailLes nouveaux critères de sélection porcine
Leroy, Pascal ULg

in Carrefour des Productions animales Gembloux (2001)

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