References of "Beckers, Yves"
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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

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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

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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

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See detailAntibodies Dynamics in the Broiler Digestive Tract after Salmonella Typhimurium Oral Challenge
Marcq, Christopher ULg; Cox, Edwin; Thewis, André ULg et al

in Duclos, Michel; Nys, Yves (Eds.) XIIIth European Poultry Conference: Program & Book of Abstracts, World's Poultry Science Journal, Volume 66, Supplement (2010, August)

This study aimed to provide directions for Salmonella challenge experiment conception by offering a better understanding of the relationship between age and mucosal immune responsiveness of chicken ... [more ▼]

This study aimed to provide directions for Salmonella challenge experiment conception by offering a better understanding of the relationship between age and mucosal immune responsiveness of chicken. Intestinal maternal immunity of Salmonella-free chicks was monitored by ELISA analyses at 2, 9 and 16 days of age. At 21 days of age, chicks were orally inoculated with Salmonella Typhimurium. Three inoculum doses (3 x 10E3, 3 x 10E6, 3 x 10E9 cfu/bird) and an uninfected control were then compared concerning mucosal immune status of the small intestine and cecum. Results suggest that difficulties encountered to infect very young chicks can be related, at least partly, to maternal immunity. The relatively low level of intestinal immune defences observed thereafter could indicate a right time to perform an experimental infection of birds and to maximize the spreading of the pathogen during challenge experiment. After infection of 3-week-old chickens, the mucosal immune response was rapid with increased anti-Salmonella Typhimurium IgA titers. There was a linear relationship between specific IgA levels in intestinal and cecal secretions and the challenge dose initially inoculated. [less ▲]

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See detailAlimentation des ruminants
Beckers, Yves ULg

Conference given outside the academic context (2010)

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See detailMesure de l'ingestion des fourrages chez le ruminant
Beckers, Yves ULg

Scientific conference (2010, April 14)

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See detailSalmonella in chicken : Current and developing strategies to reduce contamination at farm level
Vandeplas, Sabrina ULg; Dubois Dauphin, Robin ULg; Beckers, Yves ULg et al

in Journal of Food Protection (2010), 73(4), 774-785

Salmonella sp. is a human pathogen that frequently infects poultry flocks. Consuming raw or undercooked contaminated poultry products can induce acute gastro-enteritis in human. Faced with the public ... [more ▼]

Salmonella sp. is a human pathogen that frequently infects poultry flocks. Consuming raw or undercooked contaminated poultry products can induce acute gastro-enteritis in human. Faced with the public health concern associated with salmonellosis, the European Union (EU) has established a European regulation forcing Member States (MS) to implement control programs aimed at reducing Salmonella prevalence in poultry production, especially at the primary production level. The purpose of the present review article is to summarise the current research and to suggest future developments in the area of Salmonella control in poultry, which may be of value to the industry in the coming years. The review will focus especially on preventive strategies that have been developed and that aim at reducing the incidence of Salmonella colonization in broiler chickens at farm level. Besides the usual preventive hygienic measures, different strategies have been investigated, like feed and drinking water acidification by organic acids and immune strategies based on passive and active immunity. Modulating the diet in terms of ingredient and nutrient composition with the intent of reducing the bird’s susceptibility to Salmonella has also been examined. Because in-ovo feeding has been shown to accelerate small intestinal development and to enhance the epithelial cell function, it could also be an efficient tool to control enteric pathogens. Microflora-modulating feed additives, like antibiotics, prebiotics, probiotics, and synbiotics, represent another field of investigation, whose success depends on the additive used. Finally, recent control methods, such as chlorate products and bacteriophages, have also been studied. [less ▲]

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See detailLa période de tarissement chez la vache laitière
Beckers, Yves ULg

Conference given outside the academic context (2010)

Présentation des éléments historiques et actuels intervenant dans le choix de la durée des périodes tarissement et de lactation chez la vache laitière. Informations sur l'usage de rations acidifiantes en ... [more ▼]

Présentation des éléments historiques et actuels intervenant dans le choix de la durée des périodes tarissement et de lactation chez la vache laitière. Informations sur l'usage de rations acidifiantes en prévention de l'hypocalcémie de lait. [less ▲]

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See detailLogiciel de rationnement
Beckers, Yves ULg

Software (2010)

Les étapes du calcul sont : (i) la caractérisation de la vache laitière, (ii) le calcul des besoins de cet animal, (iii) le choix des aliments disponibles pour constituer la ration, (iiii) la proposition ... [more ▼]

Les étapes du calcul sont : (i) la caractérisation de la vache laitière, (ii) le calcul des besoins de cet animal, (iii) le choix des aliments disponibles pour constituer la ration, (iiii) la proposition de la ration. [less ▲]

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