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See detailL'élevage des ruminants, un élément clé de notre territoire
Hautier, Louis; Campion, Morgane; Ninane, Maxime ULg et al

in Centre wallon de Recherches agronomiques (Ed.) 19ème Carrefour des Productions Animales "La viande bovine remise en question : de sa production à sa consommation", Gembloux, le 19 février 2014 (2014)

Parallèlement à l'extension de l'agriculture, l'élevage s'est développé pour la fourniture de produits alimentaires (lait, viande) et non alimentaires (cuir, laine) mais également par l'apport de la ... [more ▼]

Parallèlement à l'extension de l'agriculture, l'élevage s'est développé pour la fourniture de produits alimentaires (lait, viande) et non alimentaires (cuir, laine) mais également par l'apport de la traction animale aux agriculteurs et la restitution d'éléments fertilisants. Ceci a notamment contribué, dans nos régions, au développement du système à jachère et culture attelée. Au cours des dernières décennies, l'agriculture s'est fortement intensifiée grâce à l'énergie fossile utilisée pour la production d'intrants, de concentrés, la mécanisation et le transport des produits alimentaires. Cette intensification de l'agriculture au niveau mondial a conduit à la spécialisation des exploitations avec une dissociation de l'élevage et de la culture en bassins de production avec des conséquences très dommageables sur l'environnement. De nos jours, les productions bovines représentent 54 % des principales orientations technico-économiques en Wallonie, selon la nouvelle classification européenne (OTEX). L'élevage bovin en production est composé de 500 601 têtes : 41 % de laitières et 59 % d'allaitantes. Il est fortement basé sur la valorisation des prairies permanentes qui occupent plus de 45 % de la surface agricole utile et concerne plus de 86 % des exploitations agricoles wallonnes sur les 13 301 recensées en 2012.Toutefois, l'élevage est de plus en plus critiqué par la société à cause de ses impacts négatifs sur l'environnement et de considérations liées au bien-être animal.De plus, dans certaines exploitations, mise en concurrence des zones de grandes cultures avec les zones herbagères pour la production de lait et viande, difficultés et contraintes du métier d'éleveur. L'arrêt de cette activité pose la question du devenir de la surface agricole qui lui était allouée. Dans ce contexte, il paraît important de passer ici en revue les principaux services liés à l'élevage de ruminants en Wallonie afin d'identifier par la suite les conditions qui permettent l'optimisation de ces derniers tout en limitant les nuisances connexes et ceci dans le but d'objectiver la situation. [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 detailL'élevage du barbeau en Wallonie
Gennotte, Vincent ULg; Prignon, Christian ULg

Book published by Les Presses Agronomiques de Gembloux (2016)

Ce document décrit les techniques d’élevage du barbeau, parcourant la reproduction, l’élevage larvaire et le grossissement des juvéniles, dans différentes conditions de production. Il constitue la ... [more ▼]

Ce document décrit les techniques d’élevage du barbeau, parcourant la reproduction, l’élevage larvaire et le grossissement des juvéniles, dans différentes conditions de production. Il constitue la synthèse des résultats d’un programme de recherche mené par le Centre de Formation et de Recherche en Aquaculture (CEFRA, Université de Liège), et financé par le Service Public de Wallonie et le Fonds Européen pour la Pêche, visant à développer les techniques d’élevage de cette espèce dans le cadre d’un programme plus vaste de restauration des populations piscicoles patrimoniales de Wallonie. Ces résultats ont été complétés par les connaissances issues de recherches antérieures pour constituer un guide technique le plus complet possible, destiné au pisciculteur intéressé par la production de nouvelles espèces. [less ▲]

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See detailL'élevage du gibier en Belgique
Bourguignon, J.-M.; Burny, Philippe ULg; Michel, P.

in Boyazoglu, Jean; Hetényi, Ladislav (Eds.) Game Farming in Europe : proceedings of the technical consultation, Nitra, Slovakia, 14-17 September, 1993 (1994)

A l'heure actuelle, on recense un seul élevage professionnel, quelques élevages semi-professionnels et parcs à gibiers. Concernant l'élevage du cervidé, la législation belge reste floue et ne distingue ... [more ▼]

A l'heure actuelle, on recense un seul élevage professionnel, quelques élevages semi-professionnels et parcs à gibiers. Concernant l'élevage du cervidé, la législation belge reste floue et ne distingue pas les cervidés sauvages et élevés, ces derniers étant en nombre très limité. Les importations et les produits de la chasse constituent les principales sources d'approvisionnement du pays en grand gibier. Cette offre de viande est écoulée vers le consommateur par l'intermédiaire des bouchers, de grossistes, de la grande distribution ou encore via le secteur HORECA. La viande des cervidés est bien connue et appréciée par le consommateur, particulièrement celle de chevreuil, biche et faon. Cependant, elle est considérée comme un produit de luxe, relativement cher, préparé, durant la saison de chasse, à l'occasion d'une fête surtout au restaurant mais aussi à domicile. Enfin, un programme de recherche devrait s'intéresser aux techniques d'élevage et à la qualité de la carcasse en vue d'optimiser sa commercialisation. [less ▲]

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See detailL'élevage du hotu en Wallonie
Gennotte, Vincent ULg; Prignon, Christian ULg

Book published by Les Presses Agronomiques de Gembloux (2016)

Ce document décrit les techniques d’élevage du hotu, parcourant la reproduction, l’élevage larvaire et le grossissement des juvéniles, dans différentes conditions de production. Il constitue la synthèse ... [more ▼]

Ce document décrit les techniques d’élevage du hotu, parcourant la reproduction, l’élevage larvaire et le grossissement des juvéniles, dans différentes conditions de production. Il constitue la synthèse des résultats d’un programme de recherche mené par le Centre de Formation et de Recherche en Aquaculture (CEFRA, Université de Liège), et financé par le Service Public de Wallonie et le Fonds Européen pour la Pêche, visant à développer les techniques d’élevage de cette espèce dans le cadre d’un programme plus vaste de restauration des populations piscicoles patrimoniales de Wallonie. Ces résultats ont été complétés par les connaissances issues de recherches antérieures pour constituer un guide technique le plus complet possible, destiné au pisciculteur intéressé par la production de nouvelles espèces. [less ▲]

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See detailElevage et gaz à effet de serre : le bilan des émissions de l'animal à la filière
Dumortier, Pierre ULg; Rabier, Fabienne; Beckers, Yves ULg et al

Scientific conference (2013, February 20)

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See detailElevage intensif et bien-être
Nicks, Baudouin ULg; Dechamps, P.

in Cahiers d'Ethologie Appliquée (1989), 9

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See detailLes élevages intensifs: sources d'empoisonnement?
Thewis, André ULg

Learning material (1999)

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See detailElevated amh Gene Expression in the Brain of Male Tilapia (Oreochromis niloticus) during Testis Differentiation
Poonlaphdecha, S.; Soler, P.; Sheng-Hui, H. et al

in Sexual Development (2011), 5(1), 33-47

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See detailElevated anti-alpha-galactosyl antibody titres. A marker of progression in autoimmune thyroid disorders and in endocrine ophthalmopathy?
Etienne-Decerf, J.; Malaise, Michel ULg; Mahieu, P. et al

in Acta Endocrinologica (1987), 115(1), 67-74

The titres of anti-alpha-galactosyl antibodies were measured by passive haemagglutination in 50 control subjects and in 128 patients presenting with various thyroid disorders. Titres of control subjects ... [more ▼]

The titres of anti-alpha-galactosyl antibodies were measured by passive haemagglutination in 50 control subjects and in 128 patients presenting with various thyroid disorders. Titres of control subjects ranged from 1/10 to 1/80, regardless of age and blood group. Elevated titres (greater than 1/80) were constantly noted in 6/6 patients with progressive exophthalmos, in 5/5 patients with untreated Graves' disease, and in 11/12 patients with progressive nontoxic goitre. By contrast, the titres were within the normal range in primary myxoedema (17 patients) and in residual exophthalmos (11 patients), whereas they were only erratically increased in 1/31 patients with treated or cured Graves' disease and in 5/36 patients with nonprogressive nontoxic goitre. Finally, elevated titres were also found in 3/7 patients presenting with autoimmune thyroiditis. No correlations could be established between elevated titres and the thyrotropin binding inhibiting immunoglobulin activity, the antithyroglobulin antibody titres or the antimicrosomal antibody titres. As in the control subjects, the anti-alpha-galactosyl antibodies mainly belonged to the IgG class. Affinity purified anti-alpha-galactosyl antibodies were capable of binding to trypsinized human and porcine thyroid cells in culture, as shown by indirect immunofluorescence. On the other hand, they were not able to react with untreated thyroid cells. The data show that the measurement of anti-alpha-galactosyl antibody titres could represent an easy and useful tool to determine whether an autoimmune thyroid disorder is in progression. Besides, they suggest that some of the antigenic determinants implicated in the enhanced production of anti-alpha-galactosyl antibodies are present, but normally hidden, within the cell surface of thyroid cells. [less ▲]

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See detailElevated antigalactosyl antibody titers reflect renal injury after gold or D-penicillamine in rheumatoid arthritis
Malaise, Michel ULg; Davin, J. C.; Mahieu, P. R. et al

in Clinical Immunology and Immunopathology (1986), 40(2), 356-364

Titers of circulating antigalactosyl antibodies (a-Gal Ab) were assessed by passive hemagglutination using rabbit red blood cells in 40 normal subjects, in 14 patients with immunodeficient states, in 47 ... [more ▼]

Titers of circulating antigalactosyl antibodies (a-Gal Ab) were assessed by passive hemagglutination using rabbit red blood cells in 40 normal subjects, in 14 patients with immunodeficient states, in 47 patients with active rheumatoid arthritis (RA), and in 15 patients with an Henoch-Schonlein disease (HS). Titers of controls ranged from 1:16 to 1:64. All immunodeficient patients exhibited very low titers (1:1). On the contrary, the existence of an enhanced humoral immune response status, as observed in RA, was not reflected by a parallel increase of a-Gal Ab titers. However, in this disease, a strong relationship existed between titers exceeding control values (greater than 1:64) and the prior occurrence of renal injury under gold or D-penicillamine therapy. Lastly, the discovery of elevated titers (greater than 1:64) in HS only when renal involvement occurred further suggests that such antibodies reflect a renal injury. [less ▲]

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See detailElevated atmospheric CO2 in open top chambers increases net nitrification and potential denitrification
Carnol, Monique ULg; Hogenboom, L.; Jach, M. E. et al

in Global Change Biology (2002), 8

The control of soil nitrogen (N) availability under elevated atmospheric CO2 is central to predicting changes in ecosystem carbon (C) storage and primary productivity. The effects of elevated CO2 on ... [more ▼]

The control of soil nitrogen (N) availability under elevated atmospheric CO2 is central to predicting changes in ecosystem carbon (C) storage and primary productivity. The effects of elevated CO2 on belowground processes have so far attracted limited research and they are assumed to be controlled by indirect effects through changes in plant physiology and chemistry. In this study, we investigated the effects of a 4-year exposure to elevated CO2 (ambient + 400 mumol mol(-1) ) in open top chambers under Scots pine (Pinus sylvestris L) seedlings on soil microbial processes of nitrification and denitrification. Potential denitrification (DP) and potential N-2 O emissions were significantly higher in soils from the elevated CO2 treatment, probably regulated indirectly by the changes in soil conditions (increased pH, C availability and NO3 (-) production). Net N mineralization was mainly accounted for by nitrate production. Nitrate production was significantly larger for soil from the elevated CO2 treatment in the field when incubated in the laboratory under elevated CO2 (increase of 100%), but there was no effect when incubated under ambient CO2 . Net nitrate production of the soil originating from the ambient CO2 treatment in the field was not influenced by laboratory incubation conditions. These results indicate that a direct effect of elevated atmospheric CO2 on soil microbial processes might take place. We hypothesize that physiological adaptation or selection of nitrifiers could occur under elevated CO2 through higher soil CO2 concentrations. Alternatively, lower microbial NH4 assimilation under elevated CO2 might explain the higher net nitrification. We conclude that elevated atmospheric CO2 has a major direct effect on the soil microbial processes of nitrification and denitrification despite generally higher soil CO2 concentrations compared to atmospheric concentrations. [less ▲]

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See detailElevated atmospheric CO2 influences ammonia oxidiser community structure and net nitrification
Carnol, Monique ULg; Malchair, Sandrine ULg

in International Symposium: Structure and Function of Soil Microbiota, Philipps-University Marburg, Germany, September 18-20, 2003 (2003)

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See detailElevated atmospheric CO2 influences ammonia oxidiser community structure and net nitrification
Carnol, Monique ULg; Malchair, Sandrine ULg

Conference (2003, September)

The control of soil nitrogen (N) availability under elevated atmospheric CO2 is central to predicting changes in ecosystem carbon storage and primary productivity. The effects of elevated CO2 on ... [more ▼]

The control of soil nitrogen (N) availability under elevated atmospheric CO2 is central to predicting changes in ecosystem carbon storage and primary productivity. The effects of elevated CO2 on belowground processes have so far attracted limited research and they are assumed to be controlled by indirect effects through changes in plant physiology and chemistry. In this study, we investigated the effects of a 4-year exposure to elevated CO2 (ambient + 400 μmol mol-1) in open top chambers under Scots pine (Pinus sylvestris L.) on net nitrification and the community of ammonia-oxidising bacteria. Net nitrate production was significantly increased for soil from the elevated CO2 treatment in the field when incubated in the laboratory under elevated CO2, but there was no effect when incubated under ambient CO2. Net nitrate production of the soil originating from the ambient CO2 treatment in the field was not influenced by laboratory incubation conditions. These results indicate that a direct effect of elevated atmospheric CO2 on soil microbial processes might take place. Molecular analysis of the ammonia-oxidising bacteria from the same soils before laboratory incubation was investigated using a PCR-based approach targeting the 16S rRNA gene of beta-subgroup ammonia oxidisers. After specific PCR, DGGE (Denaturing Gradient Gel Electrophoresis) and sequence analysis were used to determine ammonia-oxidiser community structure. First results indicate the disappearance of Nitrosospira clusters I, II and III under elevated CO2 but also call for systematic analysis of replicates to take into account methodological and sample variability. [less ▲]

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See detailElevated carbon dioxide concentration reduces alarm signaling in aphids
Boullis, Antoine ULg; Fassotte, Bérénice ULg; Sarles, Landry ULg et al

in Journal of Chemical Ecology (2017), 43

Insects often rely on olfaction to communicate with surrounding conspecifics. While the chemical language of insects has been deciphered in recent decades, few studies have assessed how changes in ... [more ▼]

Insects often rely on olfaction to communicate with surrounding conspecifics. While the chemical language of insects has been deciphered in recent decades, few studies have assessed how changes in atmospheric greenhouse gas concentrations will impact pheromonal communication by insects. Here, we hypothesize that changes in the concentration of atmospheric carbon dioxide (CO2) affect the whole dynamics of alarm signaling in aphids, including: (1) the production of the active compound (E)-β-farnesene (Eβf), (2) emission behavior when under attack, (3) perception by the olfactory apparatus, and (4) the escape response. We reared two strains of the pea aphid Acyrthosiphon pisum under ambient and elevated CO2 concentrations for several generations. We found that an increase in CO2 concentration reduced the production (i.e., individual content) and emission of Eβf (released under predation events). While no difference in Eβf neuronal perception was observed, we found that an increase in CO2 strongly reduces the escape behavior expressed by an aphid colony following exposure to natural doses of the alarm pheromone. In conclusion, our results confirm that changes to greenhouse gases do impact chemical communication in insects, and could potentially have a cascade effect on interactions with higher trophic levels. [less ▲]

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See detailElevated GH and normal IGF-1
Beckers, Albert ULg

in Acromegaly Consensus (2009)

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See detailElevated GH and normal IGF-1 : Discrepant biochemical results
Beckers, Albert ULg

Scientific conference (2009)

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See detailElevated heart rate at 24-36 h after admission and in-hospital mortality in acute in non-arrhythmic heart failure
Lancellotti, Patrizio ULg; ANCION, Arnaud ULg; Magne, Julien et al

in International journal of cardiology (2015), 182C

BACKGROUND: Elevated resting heart rate is associated with worse outcomes in chronic heart failure (HF) but little is known about its prognostic impact in acute setting. The main aim of the present study ... [more ▼]

BACKGROUND: Elevated resting heart rate is associated with worse outcomes in chronic heart failure (HF) but little is known about its prognostic impact in acute setting. The main aim of the present study was to examine the relationship between resting heart rate obtained 24-36h after admission for acute non-arrhythmic HF and in-hospital mortality. METHODS AND RESULTS: We examined the association of heart rate with in-hospital mortality in a cohort of 712 patients admitted for acute HF. None of the patients had significant arrhythmias, required invasive ventilation, or presented with acute coronary syndrome or primary valvular disease. Forty patients (5.6%) died during the hospital stay. Those patients were significantly older (78+/-9 vs. 72+/-12years; p=0.0021), had higher heart rate (92+/-22 vs. 78+/-18bpm; p<0.0001), NT pro-BNP (p=0.0005), creatinine (p=0.023), were often diabetics (p=0.026) and had lower systolic and diastolic blood pressures (p<0.05). There was a significant graded relationship between the increase in mortality rate and tertile of heart rate (p<0.01). With multivariable analysis, age (p=0.037), heart rate (p<0.0001), diastolic blood pressure (p<0.001), prior ischemic heart disease (p=0.02) and creatinine (p=0.019) emerged as independent predictors of in-hospital mortality. After adjusting for predictors of poor prognosis, patients in the highest heart rate tertile had worst outcomes when compared with those in the lowest heart rate group (p=0.007). CONCLUSIONS: Higher heart rate 24-36h after admission for acute non-arrhythmic HF is associated with increased risk of in-hospital mortality. Early targeting of elevated heart rate might represent a complementary therapeutic challenge. [less ▲]

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See detailElevated MMP-12 protein levels in induced sputum from patients with COPD
Demedts, Inge K.; Morel-Montero, A.; Lebecque, S. et al

in Thorax (2006), 61(3), 196-201

Background: Several matrix metalloproteinases ( MMPs) are involved in the pathogenesis of chronic obstructive pulmonary disease ( COPD). In mice, MMP-12 plays a crucial role in the development of ... [more ▼]

Background: Several matrix metalloproteinases ( MMPs) are involved in the pathogenesis of chronic obstructive pulmonary disease ( COPD). In mice, MMP-12 plays a crucial role in the development of cigarette smoke induced emphysema. A study was undertaken to investigate the role of MMP-12 in the development of COPD in human smokers. Methods: Induced sputum samples were collected from patients with stable COPD (n = 28), healthy smokers ( n = 14), never smokers ( n = 20), and former smokers ( n = 14). MMP-12 protein levels in induced sputum were determined by ELISA and compared between the four study groups. MMP-12 enzymatic activity in induced sputum was evaluated by casein zymography and by cleaving of a fluorescence quenched substrate. Results: Median (IQR) MMP-12 levels were significantly higher in COPD patients than in healthy smokers, never smokers, and former smokers (17.5 (7.1 - 42.1) v 6.7 (3.9 - 10.4) v 4.2 (2.4 - 11.3) v 6.1 (4.5 - 7.6) ng/ml, p = 0.0002). MMP-12 enzymatic activity was significantly higher in patients with COPD than in controls (4.11 (1.4 - 8.0) v 0.14 (0.1 - 0.2) mu g/ml, p = 0.0002). Conclusion: MMP-12 is markedly increased in induced sputum from patients with stable COPD compared with controls, suggesting a role for MMP-12 in the development of COPD in smokers. [less ▲]

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