References of "Philippe, François-Xavier"
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See detailReview on greenhouse gas emissions from pig houses: Production of carbon dioxide, methane and nitrous oxide by animals and manure
Philippe, François-Xavier ULg; Nicks, Baudouin ULg

in Agriculture, Ecosystems & Environment (2015)

The environmental impacts of livestock production are attracting increasing attention, especially the emission of greenhouse gases (GHGs). Currently, pork is the most widely consumed meat product in the ... [more ▼]

The environmental impacts of livestock production are attracting increasing attention, especially the emission of greenhouse gases (GHGs). Currently, pork is the most widely consumed meat product in the world, and its production is expected to grow in the next few decades. This paper deals with the production of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) by animals and by manure from pig buildings, with a focus on the influence of rearing techniques and nutrition. GHG emissions in piggeries originate from animals through CO2 exhalation and CH4 enteric fermentation, and from manure through the release of CO2, CH4 and N2O. The level of the CO2 exhalation (E-CO2, pig) depends on the physiological stage, the body weight (BW), the production level and the feed intake of the animals concerned. Enteric CH4 (E-CH4, pig) is principally related to dietary fibre intake and the fermentative capacity of the pig’s hindgut. Based on a review of the literature, the following equations are proposed in order to estimate E-CO2, pig (in kg day_1) and E-CH4,pig (in g day_1) for fattening pigs: E-CO2, pig = 0.136 _ BW0.573; E-CH4,pig = 0.012 _ dRes; with BW (in kg) and dRes for digestible residues (in g day_1). Numerous pathways are responsible for GHG production in manure. In addition, the microbial, physical and chemical properties of manure interact and modulate the level of emissions. Influencing factors for removal systems for both liquid and solid fractions of manure have been investigated. A large range of parameters showing an impact on the level of GHG production from pig houses has been reported. However, few of these can be considered unquestionably as GHG mitigation techniques because some strategies have shown contradictory effects depending on the gas, the circumstances and the study. Nevertheless, frequent manure removal seems to be an efficient means to reduce concurrently CO2-, CH4- and N2O-emissions from pig buildings for both slatted and bedded floor systems. Manure removal operations may be associated with specific storage conditions and efficient treatment in order to further reduce emissions. Several feeding strategies have been tested to decrease GHG emissions but they seem to be ineffective in reducing emissions both significantly and durably. In general, good management practices that enhance zootechnical performance will have beneficial consequences on GHG emission intensity. Taking into account the results described in the literature regarding CO2-, CH4- and N2O-production from animals and manure in pig houses, we estimate total GHG emissions to 448.3 kg CO2equiv. per slaughter pig produced or 4.87 kg CO2equiv. per kg carcass. The fattening period accounts for more than 70% of total emissions, while the gestation, lactation and weaning periods each contribute to about 10% of total emissions. Emissions of CO2, CH4 and N2O contribute to 81, 17 and 2% of total emissions from pig buildings, representing 3.87, 0.83 and 0.11 kg CO2equiv. per kg carcass, respectively. [less ▲]

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See detailPONTE ET QUALITÉ D’OEUFS DE CAILLES ÉLEVÉES EN CONDITIONS SEMI INTENSIVES DANS L’EST ALGÉRIEN
Moula, Nassim ULg; Philippe, François-Xavier ULg; Ait Kaki, Asma et al

in Archivos de Zootecnia (2014), 63(244), 693-696

This work investigates laying performances and egg quality of 200 quails during 266 laying days. The first collected 240 eggs, for the periods: 12, 16, 20, 24, 28, 32, 36, 40, 44 weeks were used in this ... [more ▼]

This work investigates laying performances and egg quality of 200 quails during 266 laying days. The first collected 240 eggs, for the periods: 12, 16, 20, 24, 28, 32, 36, 40, 44 weeks were used in this study. The average laying rate calculated over a period of 37 weeks is 74.44 %. All studied eggs quality parameters were significantly (p<0.001) influenced by the age of the quail. The average weight of the whole egg (13.66 g), yolk (3.99 g) and shell (2.28 g) reach their maximum value at the 40th week. The maximum albumen average weight (7.45 g) was observed at 32nd week. Albumen (12.02) and yolk (48.72) indices recorded their highest values at the 12th and the 16th weeks, respectively. The eggs freshness, expressed here by Haugh units decreased with age. They range from 89.56 at the 12th week to 83.71 at the 44th week of age. Yolk color registered values with irregular fluctuations (7.12 to 9.33) in a colorimetric scale of 15 ladders. Highly significant and positive correlations (p<0.001) and were recorded between the whole egg weight and the weight of albumen, yolk and shell. To conclude, the quail age affects significantly the various egg quality parameters. [less ▲]

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See detailÉmissions gazeuses en production porcine
Philippe, François-Xavier ULg

Conference (2014, November 04)

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See detailThe effect of the inclusion of Urtica dioica leaves meal in diets on growth performances and carcass characteristics of broiler
Moula, Nassim ULg; Philippe, François-Xavier ULg; Michaux, Charles ULg et al

Poster (2014, October 17)

The objective of this study was to evaluate the effects of the inclusion of Urtica dioica leaves meal in diets on growth performances and carcass characteristics of broiler chicken. The study was ... [more ▼]

The objective of this study was to evaluate the effects of the inclusion of Urtica dioica leaves meal in diets on growth performances and carcass characteristics of broiler chicken. The study was conducted from May to June 2014 in the area of Chemini (Algeria). In a completely randomized design, a total of 100 one-day-old broilers (industrial strain) were divided into 2 groups and 2 repetitions with 25 chickens each. Group 1 was the control group fed a standard commercial diet based on corn and soybean purchased on the local market, whereas the birds in group 2 were fed the nettle diet (control diet with addition of 2% of nettle). The animals were housed inside in experimental pens and fed ad libitum. The results showed that nettle inclusion significantly promotes growth performance of broilers at 42 days of age (1644.8 ± 45.5 vs. 1565.1 ± 45.5g; P<0.05). The broilers fed the nettle diet had higher thigh yield (26.0 ± 0.3 vs. 25.2 ± 0.3%; P<0.05) but lower abdominal fat yield (4.39 ± 0.16 vs. 3.90 ± 0.16%; P<0.05). No significant effect of the diet was observed for carcass yield (around 71.1%) and breast percentage (around 32.40%). The overall mortality was not significantly different (P>0.05) for any of the dietary regimens (around 20%). Feed conversion ratio of the two groups were very close (around 2.17). This experiment showed that dietary inclusion of Urtica dioica has positive effects on growth performance and carcass quality of broilers. [less ▲]

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See detailLocal goat in Kabylie (Chemini and Bouzeguene)
Moula, Nassim ULg; Michaux, Charles ULg; Philippe, François-Xavier ULg et al

Poster (2014, October 17)

The livestock sector plays a dynamic role in the economic development of rural areas in Algeria. Due to its adaptation to harsh environments, goat breeding is practiced in many areas of the country. To ... [more ▼]

The livestock sector plays a dynamic role in the economic development of rural areas in Algeria. Due to its adaptation to harsh environments, goat breeding is practiced in many areas of the country. To the north, it is confined to mountainous areas, but the bulk of the workforce is left in the steppe and semi-desert areas. The goat population in Algeria reached 3.8 million heads, ranking second after sheep. The present work contributes to a better characterisation of local goat in Kabylie for production and reproduction traits. The study was conducted in the regions of Chemini (Bejaia province) and Bouzeguene (Tizi-Ouzou province). A survey was conducted in 29 herds. The results revealed that the overall mean of goats per households was 6.69 ± 2.97. The purposes of keeping goat in Chemini and Bouzguene was private consumption of milk (82.76%) and meat (68.97%) as well as for commercial exchange (62.07%). The Kabyle goat is small (male: 62.23 cm and female: 58.41 cm) with long hair. Its ears are drooping, its convex profile has a slightly pronounced nasal split and its coat colour ranges from dark brown to black. However, the crossbreeding with exotic breeds (mainly with Saanen goat), controlled or uncontrolled, increased the frequency of white coat. The average age at puberty in males was 6.93 ± 1.04 and 7.38 ± 0.94 months in females. The reported age at first kidding and kidding interval were 13.03 ± 0.87 months and 7.83 ± 1.29 months, respectively. [less ▲]

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See detailEstimation of inbreeding rates and extinction risk of forty one Belgian chicken breeds in 2005 and 2010
Moula, Nassim ULg; Philippe, François-Xavier ULg; Antoine-Moussiaux, Nicolas ULg et al

in Archivos de zootecnia (2014), 63(2),

In Belgium, as generally in Europe, the dominant position of the high producing commercial strains specialized in meat or eggs production threats of extinction the local traditional breeds. In this work ... [more ▼]

In Belgium, as generally in Europe, the dominant position of the high producing commercial strains specialized in meat or eggs production threats of extinction the local traditional breeds. In this work, a follow up of the changes in populations size, and the rates of inbreeding of the Belgian poultry breeds, has been carried out in 2005 and 2010. About forty breeds were concerned. The Belgian hen breeds being overwhelmingly under threat of extinction, because of the low number of individuals by breed. For each of these breeds, various criteria were considered, risk status, breeding male to breeding female ratio, effective population size, effective population size to actual size ratio and rate of inbreeding. [less ▲]

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See detailEgg and meat production performances of two varieties of the local Ardennaise poultry breed: silver black and golden black
Moula, Nassim ULg; Michaux, Charles ULg; Philippe, François-Xavier ULg et al

in Animal Genetic Resources = Resources Génétiques Animales = Recursos Genéticos Animales (2013), 53(2), 57-67

The Ardennaise breed is emblematic of the Belgian poultry diversity. We compared two varieties of the breed, the golden black and the silver black. The comparison encompassed: (i) the morphology of adult ... [more ▼]

The Ardennaise breed is emblematic of the Belgian poultry diversity. We compared two varieties of the breed, the golden black and the silver black. The comparison encompassed: (i) the morphology of adult birds, (ii) the growth, carcass characteristics and meat quality of broilers 22 weeks old, (iii) the laying rate during 52 weeks and the egg quality. Significant differences were observed in the size of mature males and females: body weight, diameter and length of the tarsus, size of the comb and wattles. The two varieties did not differ concerning the carcass and meat quality traits. The golden black has a higher laying rate and a higher yolk / albumen ratio, but lays lighter eggs. It could be interesting to complete this study by molecular markers analysis to evaluate the degree of genetic diversity between the two varieties. [less ▲]

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See detailLes ressources génétiques ovines en Algérie
Moula, Nassim ULg; Tennah, Safia ULg; Philippe, François-Xavier ULg et al

Poster (2013, November 30)

Avec un cheptel avoisinant les 19 millions de têtes, l'élevage ovin occupe une place importante en Algérie. Outre sa contribution de plus de 50 % dans la production nationale de viandes rouges et de 10 à ... [more ▼]

Avec un cheptel avoisinant les 19 millions de têtes, l'élevage ovin occupe une place importante en Algérie. Outre sa contribution de plus de 50 % dans la production nationale de viandes rouges et de 10 à 15% dans le produit intérieur brut agricole, l’élevage ovin joue un rôle socioculturel important. Il se pratique dans toutes les zones climatiques, depuis la côte méditerranéenne jusqu'aux oasis du grand Sahara. Cette diversité pédoclimatique du plus grand pays africain offre à l’Algérie une extraordinaire diversité de races ovines, avec huit races caractérisées par une rusticité remarquable, adaptées à leurs milieux respectifs. Avec 63% du cheptel ovin total, la race Ouled Djellal, aussi appelée la race Blanche, est la plus importante race ovine algérienne. Elle est exploitée principalement pour la production de viande. La race Berbère représentant un quart du cheptel ovin national, est considérée comme la plus ancienne race algérienne. Elle est menacée par les croisements non-contrôlés avec d’autres races pour l’amélioration de son potentiel productif. La troisième race ovine très importante est la Rmbi avec 11,1% du cheptel national, considérée comme la plus lourde race ovine en Algérie avec des poids avoisinants les 90 kg chez le bélier et 60kg chez la brebis. Les races Hamra, Barbarine, D'man, Sidahou et Tazegzawt représentent ensemble moins de 1% du cheptel ovin algérien. Le déclin de ces populations illustre l’érosion dramatique que subit cette richesse exceptionnelle, appelant à la mise en place d’un plan national de gestion et de conservation des ressources génétiques. [less ▲]

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See detailPerformances de production de la population de poules locales de la Wilaya de Bejaia
Ait Kaki, Asma ULg; Moula, Nassim ULg; Antoine-Moussiaux, Nicolas ULg et al

Poster (2013, November 30)

Cette étude a pour objectif d’évaluer le potentiel productif de la population de poules locales de la Wilaya de Bejaia, en caractérisant d’une part les performances de croissance, et d’autre part les ... [more ▼]

Cette étude a pour objectif d’évaluer le potentiel productif de la population de poules locales de la Wilaya de Bejaia, en caractérisant d’une part les performances de croissance, et d’autre part les performances de ponte. Le suivi de la croissance des poulets a été effectué sur 204 poussins durant 17 semaines d’élevage (de mars à juin 2011). A 12 semaines d’âge, le taux de mortalité était de 9,31 % et l’indice de consommation était de 4,03. La modélisation de la courbe de croissance au moyen des équations de Gompertz a permis d’obtenir les relations suivantes : pour les mâles : Y(g)=2409e^((-3,68)〖 e〗^((-0,0260 t) ) ) pour les femelles : Y(g)=1835e^((-3,71)〖 e〗^((-0,0294 t) ) ) avec y, le poids corporel en grammes et t, l’âge des animaux en jours. Les performances de ponte ont été étudiées chez 38 poules durant 52 semaines (d’août 2011 à août 2012). En moyenne, la ponte débute à l’âge de 166 jours à un poids corporel de 1334g. La poule pond en moyenne 173 œufs par an d’un poids moyen variant avec l’âge de la poule, de 44 à 53g. Au vu de ces résultats, il apparaît que les poules locales de Bejaia constituent un réservoir génétique prometteur tant pour leurs performances de croissance que de ponte. Les données obtenues dans cette étude permettent d'envisager un usage des poules locales dans le cadre d'une production de qualité différenciée, en élevage pur ou en croisement. La selection de ce réservoir génétique permettra de produire une véritable race sur base de la population locale, ayant fixés les caractères désirés et reconnus par les éleveurs comme étant propres à la poule locale. [less ▲]

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See detailDiversité des races de poules locales dans trois régions du monde: Bejaia (Algérie), le Nord du Vietnam et le Bas-Congo (République Démocratique de Congo)
Moula, Nassim ULg; Antoine-Moussiaux, Nicolas ULg; Philippe, François-Xavier ULg et al

Conference (2013, November 30)

La gestion des ressources génétiques animales est capitale pour le développement de filières de production durables. En production avicole, une érosion graduelle et régulière des ressources génétiques est ... [more ▼]

La gestion des ressources génétiques animales est capitale pour le développement de filières de production durables. En production avicole, une érosion graduelle et régulière des ressources génétiques est observée à l'échelle mondiale. Parmi les causes de cette érosion, on retrouve principalement un abandon progressif, volontaire ou contraint, de ces races par les éleveurs. D'autres facteurs aggravant sont les épidémies, les catastrophes naturelles, les conflits et la dégradation de l’habitat de ces animaux. Néanmoins, les races de poules traditionnelles contribuent significativement à la production de viande et d’œufs. Les races indigènes représentent plus de 80 % de la population de volaille mondiale. Cependant, la majorité de ces races n’ont pas été décrites et sont mal connues. La gestion efficace des ressources génétiques animales en général et aviaires en particulier nécessite une identification précise des races concernées, la connaissance des effectifs (taille des populations) et leur distribution géographique, permettant la caractérisation de leur habitat. L’objectif de ce travail est par conséquent de caractériser les races de poules locales dans trois régions du monde : Bejaia (Algérie), le Nord du Vietnam et le Bas-Congo (République Démocratique de Congo) par une description phénotypique, une évaluation des performances zootechniques et une étude des différentes pratiques d’élevage. Une grande diversité phénotypique a été révélée dans chaque région d'étude. Les objectifs d'élevage sont multiples (alimentaire, financier et socioculturel) et variables d’un pays à un autre. Les femmes et les enfants jouent un rôle important dans l'aviculture familiale, quoique variable entre les régions d'étude. Ainsi, les solutions visant à la promotion des races de poules locales doivent être adaptées à la spécificité de chaque contexte. [less ▲]

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See detailCaractérisation de la race ovine Tazegzawth en Algerie: description morpho-biométrique et détermination d’une formule barymétrique
Moula, Nassim ULg; Philippe, François-Xavier ULg; Do Duc, Luc ULg et al

Poster (2013, October 11)

Le mouton Azegzaw est de robe blanche avec des taches noires à reflets bleuâtres sur le chanfrein, le pourtour des yeux et le lobe des oreilles. Non répertoriée par le standard des races ovines ... [more ▼]

Le mouton Azegzaw est de robe blanche avec des taches noires à reflets bleuâtres sur le chanfrein, le pourtour des yeux et le lobe des oreilles. Non répertoriée par le standard des races ovines algériennes, cette race présente pourtant des qualités intéressantes d'adaptation aux régions montagneuses de Kabylie, ce qui justifie la mise en œuvre d’un programme de conservation de ce patrimoine génétique original. L’objectif de cette étude, est (1) de caractériser la morpho-biométrie de moutons de race Tazegzawth et (2) de déterminer des équations barymétriques destinées à l’estimation du poids vif (PV) au départ des mensurations corporelles (périmètre thoracique: PT ; longueur du corps: LDC ; hauteur au garrot : HG ; hauteur à la croupe : HC). Au total, 89 sujets adultes (12 mâles, 77 femelles) sont concernés par cette étude. Les mensurations corporelles moyennes observées sont : - PV: 41,53±0,53 kg (mâle: 46,71kg et femelle: 40,72kg) ; - PT: 73,52±0,45 cm (mâle: 78,37cm et femelle: 72,77cm) ; - LDC: 89,10±0,44 cm (mâle: 93,82cm et femelle: 88,37cm) ; - HG: 71,40±0,43 cm (mâle: 76,06cm et femelle: 70,68cm); - HC: 70,14±0,42 (mâle: 74,80cm cm et femelle: 69,42). Les formules retenues pour l’estimation du PV sont: - Tous sexes confondus : PV=-0,025 HG2 + 4,78HG-169,88 (R2=0,87) - Femelles : PV = -0,038HG2 +6,58HG-232,39 (R2=0,84) - Mâles : PV = -0,16LDC2+0,21 HC2+284,92 (R2=0,99) En dépit de l’échantillon réduit dans l’étude, celui-ci a révélé des caractéristiques relativement homogènes. La détermination d’une formule barymétrique pourra venir en soutien d’une sélection incluant un objectif de croissance. [less ▲]

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See detailContinuous odour measurement from fattening pig units
Romain, Anne-Claude ULg; Nicolas, Jacques ULg; Cobut, Pierre et al

in Atmospheric Environment (2013), 77

A study in experimental slatted-system fattening pig units was conducted with the aim of estimating the odour emission factor (in ou/s.pig), which can subsequently be used in dispersion models to assess ... [more ▼]

A study in experimental slatted-system fattening pig units was conducted with the aim of estimating the odour emission factor (in ou/s.pig), which can subsequently be used in dispersion models to assess the odour annoyance zone. Dynamic olfactometry measurements carried out at different development stages of pigs showed a logical trend of the mean predicted odour emission factor with the pig weight. However, the variation within the same weight class was much larger than variation between classes. Possible causes of such variation were identified as the evolution of ventilation rate during the day and the circadian rhythm of pig. To be able to monitor continuously the daily variation of the odour, an electronic nose was used with suitable regression model calibrated against olfactometric measurements. After appropriate validation check, the electronic nose proved to be convenient, as a complementary tool to dynamic olfactometry, to record the daily variation of the odour emission factor in the pig barn. It was demonstrated that, in the controlled conditions of the experimental pens, the daily variation of the odour emission rate could be mainly attributed to the sole influence of the circadian rhythm of pig. As a consequence, determining a representative odour emission factor in a real case cannot be based on a snapshot odour sampling. [less ▲]

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See detailInfluence of permanent use of feeding stalls as living area on ammonia and greenhouse gas emissions for group-housed gestating sows kept on straw deep-litter
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Livestock Science (2013), 155

In pig production, the interest for litter systems in relation with animal welfare and the ban by 2013 in the EU of individual accommodations for gestating sows could promote the group-housing of ... [more ▼]

In pig production, the interest for litter systems in relation with animal welfare and the ban by 2013 in the EU of individual accommodations for gestating sows could promote the group-housing of gestating sows on deep-litter. However, compared to slatted-floor systems, few data are available on the gaseous emissions associated with the different modalities of rearing sows on deep-litter. In this study, two modalities were compared: group housing on a 3 m2/sow deep-litter or on a 1.8 m2/sow deep-litter plus 1.2 m2/sow concrete floor. In both cases, sows were fed in individual feeding stalls (1.2 m2/stall) but the access was limited at feeding time in the first case and permanent in the second one. Three successive batches of 10 gestating sows were used. Each batch was divided into 2 homogeneous groups randomly allocated to one of two treatments: fully (3 m2/sow) or partly (1.8 m2/sow) straw-based deep-bedded floor. The groups were kept separately in two identical rooms with same volume and same surface, equipped with five individual feeding stalls in contact with a pen of either 9 or 15 m2 deep-litter. The feeding stalls were equipped with front feeding troughs and rear gates allowing or not permanent access to the stalls outside of feeding times. Between each batch, the pens were cleaned. In both rooms, ventilation was automatically adapted to maintain a constant ambient temperature. The gas emissions (nitrous oxide, methane, carbon dioxide, ammonia and water vapour) were measured 3 times (weeks 2, 5 and 8 of stay) during 6 consecutive days by infrared photoacoustic detection. Sow performance was not significantly affected by floor type. With sows kept on partly bedded floor, gaseous emissions were significantly greater for methane (12.76 vs. 9.90 g/d.sow; P<0.001), carbon dioxide (3.12 vs. 2.90 kg/d.sow; P<0.01) and water vapour (4.70 vs. 4.03 kg/d.sow; P<0.001), and significantly lower for nitrous oxide (3.14 vs. 6.12 g/d.sow; P<0.001) and CO2 equivalents (1.24 vs. 2.10 kg/d.sow; P<0.001) compared to sows housed on fully bedded floor. There was no significant difference for ammonia emissions (8.36 vs. 7.45 g/d.sow; P>0.05). From the present trial in experimental rooms, it can be concluded that keeping group-housed gestating sows on partly straw bedded floor with permanent access to the concrete feeding stalls compared to fully straw bedded floor did not significantly influence animal performance and NH3-emissions, and decreased CO2eq-emissions (-40%). This decrease was observed owing to an important decrease of N2O-emissions (-49%). [less ▲]

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See detailEmissions of ammonia, nitrous oxide and methane from pig houses: Influencing factors and mitigation techniques
Philippe, François-Xavier ULg; Nicks, Baudouin ULg

in Reconciling livestock management to the environment - Applying Best Available Technique (BAT): From the lab to the farm (2013)

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See detailCaractérisation des performances d’élevage et de production de deux variétés de la race Ardennaise
Moula, Nassim ULg; Michaux, Charles ULg; Philippe, François-Xavier ULg et al

Poster (2012, October 19)

La poule Ardennaise est une race emblématique de la biodiversité avicole belge. Dans un contexte mondial favorable à la conservation des races locales d’animaux domestiques, cette étude est consacrée à la ... [more ▼]

La poule Ardennaise est une race emblématique de la biodiversité avicole belge. Dans un contexte mondial favorable à la conservation des races locales d’animaux domestiques, cette étude est consacrée à la comparaison de deux variétés de la race Ardennaise (Noire dorée et Noire Argentée). La comparaison est réalisée par le biais de trois études: (1) caractérisation morpho-biométrique des deux variétés; (2) caractérisation de la croissance et de la qualité de la carcasse et de la viande; (3) suivi du taux de ponte pendant 52 semaines et l’étude de la qualité des œufs à 30, 45, 60 et 75 semaines d’âge. Des différences significatives ont été enregistrées au niveau des poids corporels, du grand diamètre du tarse, de la longueur du tarse et de la taille de la crête des deux variétés. La variété de la poule Ardennaise n’influence pas significativement les caractères quantitatifs et qualitatifs de production de viande (rendement, poids après abattage, pH, couleur de la viande). Elle influence cependant significativement le poids de l’œuf entier, le poids du blanc, le pourcentage du blanc, le pourcentage du jaune, le rapport jaune/blanc et le pH du blanc (p<0,05). Pour plusieurs caractères morphologiques, d’engraissement et de ponte, les deux variétés ne présentent aucune différence significative. Il serait intéressant de compléter cette étude par une analyse moléculaire permettant de préciser le degré de similitude génétique entre les deux variétés et éventuellement avec les autres variétés de la race. [less ▲]

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See detailQuality characteristics of marketed eggs in Basse Kabylie (Algeria)
Moula, Nassim ULg; Philippe, François-Xavier ULg; Ait Kaki, Asma ULg et al

Poster (2012, October 19)

Quality variations of retailed eggs are widely reported. This study aims at assessing the quality of eggs according to the marketing channel in the department of Bejaia (Algeria). In spring and summer ... [more ▼]

Quality variations of retailed eggs are widely reported. This study aims at assessing the quality of eggs according to the marketing channel in the department of Bejaia (Algeria). In spring and summer 2012, a total of 3330 eggs were bought in 30 stores divided into 3 categories: 10 supermarkets (1146 eggs), 10 public markets (1048 eggs), and 10 shops (1136 eggs). The eggs weights differed significantly with the marketing channel with 58.9±0.14, 61.2±0.13 and 62.8±0.13 g for public markets, shops and supermarkets, respectively (p<0.001). Although the shell thickness was similar for all marketing channels, the proportion of damaged eggs was higher in public markets (9.0%), intermediate in shops (7.3%) and lower in supermarkets (5.7%; p<0.05). The yolk/albumen ratio was significantly higher for eggs from supermarkets (48.1%) compared to the other channels (around 47.4%; p<0.05). The freshness of the eggs, measured by the Haugh method, was lower in public markets (74.3 units), intermediate in shops (77.6 units) and higher in supermarkets (79.9 units; p<0.05). The price of eggs, expressed in Algerian Dinar (AD) per kg, was significantly lower in public markets (124 AD/kg) compared to the two other channels (around 131 AD/kg; p<0.05). One can conclude that egg quality in Basse Kabylie differs significantly between marketing channels with higher quality observed in supermarkets. The lower quality of eggs in public markets is associated with lower price. Eggs from shops present an intermediate quality. A one-year study would allow studying both the potential seasonal effect and compare intrinsic variability across marketing channels. [less ▲]

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Full Text
See detailGaseous emissions from fattening pigs offered an ad libitum high-fibre diet and kept on fully slatted floor: preliminary results
Philippe, François-Xavier ULg; Laitat, Martine ULg; wavreille, José et al

in Proceedings of the 2nd Scientific Meeting of the Faculty of Veterinary Medicine (Liège – Belgium) (2012)

According to the literature, the diet composition of livestock can influence polluting gas emissions from agriculture. The aim of this preliminary study was to measure gaseous emissions from fattening ... [more ▼]

According to the literature, the diet composition of livestock can influence polluting gas emissions from agriculture. The aim of this preliminary study was to measure gaseous emissions from fattening pigs offered an ad libitum high-fibre diet (HFD) and kept on fully slatted floor. A batch of 24 fattening pigs was divided into two homogeneous groups randomly allocated to a treatment: conventional cereals-based diet or sugar beet pulpbased diet (HFD). With HFD, a significant decrease of animal performance was observed (837 vs. 962 g for the average daily gain). With pigs offered HFD, gaseous emissions per pig were significantly lower for NH3 (-30%, 6.64 vs. 9.47 g/d; P<0.05) and significantly greater for CH4 (+40%, 6.46 vs. 4.60 g/d; P<0.05). The emissions of N2O (0.34 g/d), CO2equivalent (0.27 kg/d), CO2 (1.68 kg/d) were not significantly influenced by the diet. Due to a more important microbial activity with HFD, the lower NH3-emissions could be attributed to the shift of a part of excreted nitrogen from urine (as urea) to faeces (as protein form), and to a lower slurry pH explained by the increase of volatile fatty acid content. The higher CH4-emissions could be explained by a greater production in the digestive tract and in the slurry due to fibre fermentations. In conclusion, HFD allowed decreasing NH3- and increasing CH4-emissions. However, in terms of climate change, this increase was offset by the decrease of indirect N2O-emissions due to NH3-emission decrease, as indicated by the similar CO2equivalent-emissions in the two groups. [less ▲]

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Peer Reviewed
See detailGaseous emissions from fattening pigs offered an ad libitum high-fibre diet and kept on fully slatted floor: preliminary results
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Proceedings of the International Symposium on Emissions of Gas and Dust from Livestock (2012)

Detailed reference viewed: 7 (1 ULg)