References of "Beckers, Yves"
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See detailCarbon exchange in a Belgian grassland with cattle
Jerome, Elisabeth ULg; Beckers, Yves ULg; Bodson, Bernard ULg et al

Poster (2011, April 08)

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See detailLogiciel de formulation
Beckers, Yves ULg

Software (2011)

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See detailTarissement court vs long ? Lactation longue vs courte ?
Beckers, Yves ULg

Conference given outside the academic context (2011)

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See detailLes produits du maïs fourrage : comment les réfléchir dans les rations des bovins ?
Beckers, Yves ULg

Conference given outside the academic context (2011)

Présentation des principales caractéristiques des produits du maïs fourrage et des éléments positifs et négatifs de leur introduction dans les rations des bovins.

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See detailAlimentation et définitions des rations dans les exploitations laitières
Beckers, Yves ULg

Scientific conference (2011, February 02)

Présentation des principaux principes du rationnement des vaches laitières

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See detailLes aspects nutritionnels de la betterave fourragère et son intégration dans les rations
Beckers, Yves ULg

Conference given outside the academic context (2011)

Présentation des principales caractéristiques de la betterave fourragère et des éléments positifs et négatifs de son intégration dans les rations des bovins.

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Peer Reviewed
See detailSalmonella Typhimurium oral challenge model in mature broilers: Bacteriological, immunological, and growth performance aspects.
Marcq, Christopher ULg; Cox, Edwin; Szalo, Ioan Mihai ULg et al

in Poultry Science (2011), 90(1), 59-67

In this study, Salmonella enterica serovar Typhimurium challenge models were tested to identify the best conditions under which to perform the experimental infection of 3-wk-old broilers. Such a model ... [more ▼]

In this study, Salmonella enterica serovar Typhimurium challenge models were tested to identify the best conditions under which to perform the experimental infection of 3-wk-old broilers. Such a model would be useful to study the efficiency of therapeutic treatments that could take place at the end of the grow-out period. Salmonella-free chicks were obtained from a breeder flock vaccinated with Salmonella. Intestinal maternal immunity was monitored by ELISA analyses at 2, 9, and 16 d of age. Data indicated that protection of maternal origin was not maintained over time and was drastically reduced at 9 d of age (P < 0.01). At 21 d of age, chickens were orally inoculated with Salmonella Typhimurium. The effects of the oral challenge dose (0, 3 x 10(3), 3 x 10(6), and 3 x 10(9) cfu/bird) and vancomycin pretreatment (no administration or 25 mg/bird) on intestinal immune responses, growth performance, and Salmonella colonization of chickens were investigated. After infection, the mucosal immune response was rapid, with increased (P < 0.01) anti-Salmonella Typhimurium IgA titers measured at 8 d postinfection in intestinal contents. A linear relationship (P < 0.05) existed between specific IgA levels in intestinal and cecal contents and the challenge dose inoculated. None of the challenge protocols caused mortality or clinical symptoms after infection. Nevertheless, the experimental infection induced a significant deterioration of growth performance. The pretreatment with 25 mg of vancomycin at 3 h before Salmonella inoculation was able to establish stable infection rates among the population of 3-wk-old infected chickens. Nevertheless, Salmonella shedding was not stable over the rearing period, and the bacteria seemed to be naturally eliminated from most birds at 22 d postinfection. This natural clearance of the gut, which was related, at least in part, to the intestinal immune response, should limit the usability of the created mature challenge model within 1 to 2 wk after inoculation. [less ▲]

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See detailPartial replacement of fish meal with Azola meal in diets for Nile tilapia (Oreochromis niloticus L.) affects growth and whole body fatty acid composition
Abou, Youssouf; Adite, Alphonse; Ibikounle, Moudachirou et al

in International Journal of Biological and Chemical Sciences (2011), 5(6), 2224-2235

The replacement of fishmeal (FM) with Azolla meal (AM) in diets on growth and fatty acid in Nile tilapia, Oreochromis niloticus (initial mean weight: 16.4 g) was studied. Fish were fed with six ... [more ▼]

The replacement of fishmeal (FM) with Azolla meal (AM) in diets on growth and fatty acid in Nile tilapia, Oreochromis niloticus (initial mean weight: 16.4 g) was studied. Fish were fed with six isonitrogenous (29.2% CP) and isoenergetic (16.9 kJ.g-1) diets containing 0%, 10%, 20%, 30%, 40% and 50% AM respectively, as partial FM substitute. Diet A0 acted as a control. The final weight (51.0-88.3 g), the weight gain (210.8-438.3%) and the SGR (1.3-1.9%day-1) decreased when AM level higher than 10% in diets (P < 0.05). The FCR (1.44 to 2.35) significantly increased when AM level exceeded 20% (P < 0.05). The protein efficiency ratio and the apparent net protein utilization decreased consequently. The fatty acids in the whole fish were significantly influenced by the diets. The replacement of FM by AM produced fish with lower (n-3) highly unsaturated fatty acids mainly docosahexaenoic acid, and higher arachidonic acid (P < 0.05). The n-3/n- 6 fatty acid ratio ranged from 0.08 to 0.17, and was lower in fish fed A40 and A50 (P < 0.05). The findings suggest that high AM in diets affects Nile tilapia growth and the fern could be incorporated in diets up to 30% without any adverse effect on fish fatty acid composition. However, alternative additional source of lipid must be used to improve the quality of fish fed AM-diets. [less ▲]

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See detailInfluência da modalidade de apresentação do trigo
Piron, Fabien ULg; Philippart de Foy, Martin; Thewis, André ULg et al

Article for general public (2011)

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See detailApproximate compositional values and tissue fatty acid profiles of Nile Tilapia (Oreachromis niloticus L.) fed azolla-diets in earthen ponds
Abou, Youssouf; Fiogbé, Emile Didier; Beckers, Yves ULg et al

in Food and Nutrition Sciences (2011), 2

The approximate general composition and the fatty acid profile of Nile tilapia fed Azolla-diets in ponds were studied for 90 days. Six isonitrogenous (29.2% CP) and isoenergetic (16.9 kJ·g−1) diets were ... [more ▼]

The approximate general composition and the fatty acid profile of Nile tilapia fed Azolla-diets in ponds were studied for 90 days. Six isonitrogenous (29.2% CP) and isoenergetic (16.9 kJ·g−1) diets were formulated to contain 0% (A0), 10% (A10), 20% (A20), 30% (A30), 40% (A40) and 50% (A50) of Azolla meal (AM), as partial fish meal (FM) substitutes. Diet A0 without AM served as a control. Fish growth decreased as AM level exceeded 20% in diets (P < 0.05). Dry matter and crude protein showed no significant differences (P > 0.05). Crude lipid was significantly lower in fish fed A50 and significant differences were also found in crude ash (P < 0.05). Linolenic acid (LLA) decreased significantly when AM level in diets increased (P < 0.05). In contrast, arachidonic acid (ARA), eicosapentaenoic acid (EPA) and docosahex- aenoic acid (DHA) showed significantly higher values in fish fed high AM (P < 0.05). The n − 3/n − 6 ratio ranged from 0.35 to 0.49, with values being significantly higher in fish fed A20, A30 and A50. High level of the fern reduces growth without negatively affecting fatty acid in fish. Fish PUFA, especially the (n − 3) fatty acids, are affected posi- tively, even when fed 50% AM, which is good for the quality of the fish produced in regard to the benefits for the health of consumers. [less ▲]

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See detailPotential mineral deficiencies for Ndama cattle grazing Urochloa sp. based tropical pastures in the Bas-Congo province of the Democratic Republic of Congo
Picron, Pascale ULg; Goubau, Amaury ULg; Lecomte, Thomas et al

in Advances in Animal Biosciences (2011), 2(2), 388

Artificial pastures are used to increase carrying capacity in the wet tropics by supplying higher quality forage (energy and protein) to the animals all year long. Sowing pastures is labour-intensive so ... [more ▼]

Artificial pastures are used to increase carrying capacity in the wet tropics by supplying higher quality forage (energy and protein) to the animals all year long. Sowing pastures is labour-intensive so to be profitable all other possible growth limiting factors, especially minerals, should be alleviated. We studied nutrients intake (energy, protein and minerals) in cattle grazing Urochloa sp. pastures in Western DRC. Three Urochloa ruziziensis and 3 U. decumbens pastures in Kolo-Fuma (Bas-Congo, DRC) were studied. Three Ndama steers and 3 cows grazing each pasture consecutively during the short rainy and dry seasons were followed by handplucking and samples were analysed for energy, crude protein and ash to calculate energy value (fodder units, FU) and digestible crude protein content (DCP) of the diets. NIRS was used on faeces to determine dry matter (DM) intake and ICP-AES to determine mineral content of the diets. Intake levels reached 66 ± 4.3 g kg-1LW0.75, nutritive value of forage was 0.701 ± 0.036 FU and 4.78 ± 1.04 % DCP, allowing daily weight gains > 550 g for steers and > 350 g for cows. P, Ca, Mg, K, Mn & Fe were provided above requirements by the pasture. Na, Cu and Zn were deficient, especially during the short dry season for Cu and Zn. U. ruziziensis pastures tended to provide more minerals, especially during the rainy season. A mineral supplement providing Na, Cu and Zn is required to reach the daily weight gains allowed by energy and protein supplies. The supplement could reasonably be similar for U. decumbens and U. ruziziensis pastures, but the dry season formula should provide more Cu and Zn than the rainy season formula [less ▲]

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See detailKeep bacteria under control: Dietary modulation of gut microflora in farm animals by use of hen egg yolk antibodies
Marcq, Christopher ULg; Thewis, André ULg; Portetelle, Daniel ULg et al

E-print/Working paper (2010)

This review article focuses on the use of IgY in therapy or prophylaxis of diseases in veterinary medicine as well as in the context of functional foods to modulate microflora in animal.

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See detailLes produits du maïs fourrage : comment les réfléchir dans les rations des bovins ?
Beckers, Yves ULg

Conference given outside the academic context (2010)

Présentation des principales caractéristiques des produits du maïs fourrage et des éléments positifs et négatifs de leur intégration dans les rations des bovins

Detailed reference viewed: 11 (3 ULg)
See detailLes produits du maïs fourrage : comment les réfléchir dans les rations des bovins ?
Beckers, Yves ULg

Conference given outside the academic context (2010)

Présentation des principales caractéristiques des produits du maïs fourrage et des éléments positifs et négatifs de leur intégration dans les rations des bovins

Detailed reference viewed: 12 (3 ULg)
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See detailLes aspects nutritionnels de la betterave fourragère et son intégration dans les rations
Beckers, Yves ULg

Conference given outside the academic context (2010)

Présentation des principales caractéristiques de la betterave fourragère et des aspects positifs et négatifs de son intégration dans les rations des bovins

Detailed reference viewed: 16 (4 ULg)