References of "Hornick, Jean-Luc"
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See detailGrowth performance, carcass quality characteristics and colonic microbiota profiles in finishing pigs fed diets with different inclusion levels of rice distillers’ by‐product
Nguyen Cong, Oanh ULiege; Taminiau, Bernard ULiege; Pham Kim, Dang et al

in Animal Science Journal (2019)

The aim of this study was to evaluate the effects of diets containing rice distillers’ by-product (RDP) on growth performance, carcass characteristics, meat quality, and gut microbiota of fattening pigs ... [more ▼]

The aim of this study was to evaluate the effects of diets containing rice distillers’ by-product (RDP) on growth performance, carcass characteristics, meat quality, and gut microbiota of fattening pigs. Twenty-four crossbred finishing pigs (Duroc × Landrace × Yorkshire), 56.9 ± 3.1 kg initial body weight, were randomly allocated to three groups. For 56 days, pigs were fed one out of three diets including RDP0 (control), RDP15 (15% RDP in DM) and RDP30 (30% RDP in DM). With RDP level in diet, average daily gain and backfat thickness linearly increased (p < .05), and drip loss tended to increase (p ≤ .08). In addition, 16S ribosomal RNA gene amplicon profiling showed that RDP was associated with modulation of colonic microbiota composition, especially at family and genus levels. Relative abundance of Porphyromonadaceae and Erysipelotrichaceae families in colonic digesta increased with inclusion of RDP, while that of Enterobacteriaceae decreased. The proportion of genera unclassified Erysipelotrichaceae, and Butyrivibrio increased as inclusion of RDP. These results indicate that up to 30% inclusion in diet of finishing pigs, RDP can modulate colonic microbiota composition, and induces an improvement of animal growth and fat deposition. [less ▲]

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See detailDo topography and fruit presence influence occurrence and intensity of crop-raiding by forest elephants (Loxodonta africana cyclotis)?
Ngama, Steeve ULiege; Bindelle, Jérôme ULiege; Poulsen, John R. et al

in PLoS ONE (2019), 14(3), 16

Crop damage by forest elephants (Loxodonta africana cyclotis) and the resulting human-elephant conflict are issues of great concern for both the conservation of the species and the protection of rural ... [more ▼]

Crop damage by forest elephants (Loxodonta africana cyclotis) and the resulting human-elephant conflict are issues of great concern for both the conservation of the species and the protection of rural livelihoods in Central Africa. Addressing these problems requires identifying the factors that facilitate or impede crop-raiding by forest elephants. Yet to date, the environmental or anthropogenic factors that influence the occurrence and intensity of cropraiding by forest elephants are largely unknown. We used a multivariate approach to investigate conditions under which forest elephants raid some fields and not others in the buffer zone of Monts de Cristal National Park (MCNP), Gabon. We first interviewed 121 farmers from 11 villages situated within 10 km of MCNP regarding the occurrence of elephant cropraiding of their fields. We then collected data on 39 explanatory variables to characterize the agricultural fields. Of these, the most important predictors of elephant raid occurrence of crop damage were presence of fruit trees, elephant deterrents (scarecrows, fire, wire string fences and empty barrels), and field topography. We secondly assessed the effect of stage of crop growth, presence of fruit trees, field topography and presence of elephant deterrents on crop-raiding occurrence and intensity by counting raids and measuring areas of crop damage every week in 17 plantations over 19 weeks in the most elephant-impacted zone of the study area. We found that fruit presence and stage of crop growth led to more intense damage to crops, whereas local deterrents did not inhibit raiding events and crop damage by elephants. We report a tradeoff between non-timber forest products (NTFP) services and crop-raiding by elephants. We show for the first time that steep topography impedes elephant damage to crops with no raids recorded in fields with surrounding slopes greater than 25%. We discuss whether farming on steep fields could be used as a strategy for mitigating crop-raiding to favor human-elephant coexistence and enhance elephant conservation. [less ▲]

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See detailIn growing pigs, nutritive value and nutrient digestibility of distillers’ by-products obtained from two varieties of rice
Nguyen Cong, Oanh ULiege; Pham Kim, Dang; Bindelle, Jérôme ULiege et al

in Tropical Animal Health and Production (2019)

In South-East Asia, rice distillers’ by-product (RDP) is a widely abundant feedstuff whose adequate incorporation into pig diets is still questionable. Especially, effects of RDP on nutrient digestibility ... [more ▼]

In South-East Asia, rice distillers’ by-product (RDP) is a widely abundant feedstuff whose adequate incorporation into pig diets is still questionable. Especially, effects of RDP on nutrient digestibility of growing pigs fed corn-soybean meal-based diet are lacking. The objective of this study was to determine nutrient digestibility and energy value of ordinary (ORDP) and glutinous (GRDP) rice distillers’ by-product in growing pigs. Two groups of 12 castrated crossbred barrows (Duroc × Landrace × Yorkshire), about 3 months old, 38 ± 1.04 kg initial body weight, were each allocated to a 15-day experiment in which pigs were divided into three iso-nitrogenous diet-groups. The animals were housed individually in metabolism cages for separated collection of feces and urine. Each diet-group was provided either a control corn-soybean meal diet or a diet in which corn and soybean meal were partly replaced by ORDP or GRDP at 15 or 30% on diet dry matter basis. Glutinous by-product especially showed higher levels in crude protein, neutral/acid detergent fiber, total branched-chain amino acids and butyric acid. When compared to the control diet, ORDP tented to increase DM intake (P = 0.054) but decreased energy (P < 0.001) and crude protein (P < 0.04) digestibility, while GRDP decreased DM intake (P < 0.001). Both GRDP and ORDP products negatively affected digestibility of ether extract. The average digestible and metabolizable energy of ORDP and GRDP were 17.0 and 16.6, and 17.7 and 17.1 MJ/kg DM, respectively. In conclusion, these results show that both RDP, and especially GRDP, are highly valuable protein and energy sources for pig production. [less ▲]

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See detailProductive performance, metabolic, and hematologic parameters of pregnant nulliparous rabbit does according to dietary protein level
Saidj, Dahia; Ainbaziz, Hacina; Iles, Imene et al

in Journal of Advanced Veterinary and Animal Research (2019), 6(1), 18-24

Objective: This study aims at investigating the productive performance, metabolic, and hematological profiles of Algerian local rabbits does during their first pregnancy and according to dietary protein ... [more ▼]

Objective: This study aims at investigating the productive performance, metabolic, and hematological profiles of Algerian local rabbits does during their first pregnancy and according to dietary protein content. Materials and methods: A total of 52 nulliparous rabbit does, 3,116 ± 72.9 g live weight, were allocated individually to three groups (17/18 females per group) being on isoenergetic diets [2,600 kcal Digestible Energy (DE)/kg] that differ in their digestible protein content by 15%, 17%, and 19%, respectively, for L, M, and H diets. All these diets were provided ad libitum. Results: The use of a high protein diet did not affect does weight and feed intake during the pregnancy period. Statistically, no significant difference (p > 0.05) was recorded in born or alive litter size and birth weight. There was no effect of diet and sampling time (p > 0.05) on plasma metabolites but there were significant effects of sampling time (p < 0.0001) on the metabolic parameters studied with prolificacy used as a covariate. Hematologic indices in pregnant rabbits were not affected by the diet exceeded the red blood cells rate that increased significantly (p < 0.05) with the increase in dietary protein content during the different periods of gestation. Conclusion: The use of a high protein diet has no effect on weight during the pregnancy period. No effect of diet and sampling time on plasma metabolites and hematological profiles are recorded; however, significant effects of sampling time are recorded on the metabolic parameters. [less ▲]

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See detailEffects of Opuntia ficus-indica on Growth Performance and Serum Parameters of Broiler Chicken in Algeria
Moula, Nassim ULiege; Humbel, Maïlis ULiege; Leterrier, Mélanie et al

in Tropicultura (2019), 37(1),

Thanks to the wide diversity of soil and climate, Algeria has a substantial number of plants which can be used in animal feed. This work is a part of the barbaric fig cladodes evaluation, widely present ... [more ▼]

Thanks to the wide diversity of soil and climate, Algeria has a substantial number of plants which can be used in animal feed. This work is a part of the barbaric fig cladodes evaluation, widely present in the Algerian rural landscape, as a broiler chicken feed supplement. The aims of this study are to measure the effects of Opuntia ficus-indica (OFI) powder on the growth performances, serum parameters and carcass characteristics of broiler chickens. The experiments were performed in a private poultry farm, located in the Chemini region. In this study, 120-Ross-308 days-old male chicks were monitored. They were divided into three groups according to the specific diet consumed (4 x 10 chicks by group). The group 1 was offered a commercial feed, while groups 2 and 3 received the same feed containing: 5% and 10% of OFI powder respectively. The OFI powder did not show any negative effect on the final body-weight, average daily gain and carcass characteristics. In contrast, it decreased (p < 0.05) some biochemical parameters in blood, like plasma glucose; uremia; cholesterol; and triglycerides. In conclusion, the OFI powder can be used as a potential additive in the commercial feed of broiler chickens which could efficiently reduce their cost sales in the Algerian market. [less ▲]

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See detailChemical composition of spiny cactus cladodes (Opuntia ficus indica f. amyclae) under age and collection period effect in Northern Morocco
El Otmani, Samira ULiege; AYADI, Mohamed; Hornick, Jean-Luc ULiege et al

in Proceedings of the 5th FARAH-Day (2018, October 26)

In Northern Morocco, goat herd is the most dominant. His feeding is based on forest rangelands and characterized by strong seasonal variability responsible of the low productivity. Feed improvement is ... [more ▼]

In Northern Morocco, goat herd is the most dominant. His feeding is based on forest rangelands and characterized by strong seasonal variability responsible of the low productivity. Feed improvement is necessary. Cactus cladodes represent an available resource that can take their place in goat feeding. In order to introduce them, it is necessary to characterize their chemical composition. This work aims to determine the chemical composition of cactus cladodes according to age and collection period. Twenty four samples of young and old cactus were collected in three places in Tangier in four periods (April to June). In the laboratory, measurement parameters of cladodes were determined and samples were dried in oven at 60°C and subsequently ground and sieved to 1 mm diameter. The studied composition parameters were dry matter, ash, crude protein, ether extract, fibers and phenolic compounds. The chemical composition of these samples was determined by the methods of AOAC (1997). From results, age affected morphological measurements with superiority of mature cladodes (P<0.001). Length and width increased significantly with time (P<0.001). However, thickness and weight were similar in all periods. Nutritional quality of cladodes decreased significantly with ageing. Ash and fibers were lower and protein, moisture, fat and phenolic compounds were higher in young cladodes. Collection period affected moisture, protein, crude fiber, ADF and condensed tannins. Except ADF, these affected parameters decreased by time. In conclusion, cladodes have interesting chemical composition especially young cladodes that allowed them to be incorporated in ruminant feed diet. [less ▲]

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See detailNutrient digestibility in Algerian local young rabbits according to dietary energy
Saidj, Dahia; Moula, Nassim ULiege; Kadi et al

in Animal (2018, September 02)

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See detailTeneur en minéraux principaux de la viande cameline en Algérie
Sahraoui, Naima; Moula, Nassim ULiege; Boudjenah, Saliha et al

in Revue d'Élevage et de Médecine Vétérinaire des Pays Tropicaux (2018), 71((4)),

L’objectif de l’étude était de déterminer les concentrations en minéraux et en oligoéléments de la viande de dromadaire en Algérie. Des échantillons de viande de 32 dromadaires ont été recueillis. Les ... [more ▼]

L’objectif de l’étude était de déterminer les concentrations en minéraux et en oligoéléments de la viande de dromadaire en Algérie. Des échantillons de viande de 32 dromadaires ont été recueillis. Les dosages ont été réalisés par spectroscopie d’émission atomique. Les concentrations moyennes (± erreur type) en calcium et en phosphore ont été respectivement de 33,1 ± 6,1 et 655 ± 21,3 mg / 100 g. Les teneurs en oligoéléments ont été de 14 056 ± 831 μg / 100 g pour le zinc, 6100 ± 447 μg / 100 g pour le fer, et 1322 ± 43 μg / 100 g pour le cuivre. Le facteur race a eu un effet très significatif (p < 0,001) sur les teneurs en calcium et en sodium. Aucun effet significatif (p < 0,05) de l’âge n’a été observé sur les différents minéraux étudiés. La viande de dromadaire présente des teneurs en minéraux proches de celles des autres animaux de rente. [less ▲]

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See detailForest and silvopastoral cover changes and its drivers in northern Morocco.
Chebli, Youssef ULiege; Chentouf, Mouad; Ozer, Pierre ULiege et al

in Applied Geography (2018), 101

In northern Morocco, forest and silvopastoral areas have always formed an integral part of goat feeding and consequently of extensive livestock systems. However, it was reported that these areas are now ... [more ▼]

In northern Morocco, forest and silvopastoral areas have always formed an integral part of goat feeding and consequently of extensive livestock systems. However, it was reported that these areas are now going through a gradual degradation mainly due to overgrazing, resulting in land use-land cover (LULC) changes. Doubts persist about actual goat grazing impacts on forest and silvopastoral cover changes. Detecting and understanding drivers of LULC changes has become a central component of current strategies for managing natural resources to implement appropriate development policies. The objectives of this study were to assess the forest and silvopastoral cover changes and transition among five major land cover classes that took place in the last three decades (1984–2014), to verify the hypothesis that goats act as a main driver of forest and silvopastoral de-gradation, and to explore the perception of stakeholders based on remote sensing data, field surveys, and overall statistics. Between 1984 and 2014, forest and silvopastoral areas declined by 25% (matorral included). Farmers and local institutions all agreed that drought, fire, soil erosion, and population growth are the most striking drivers of forest and silvopastoral decreases. One being utilitarian and the other protectionist, they have con-flicting perceptions about the effect of agricultural expansion, authority policy, deforestation, and overgrazing. The forest cover change is impacted by interaction among different change drivers. The levels of forest de-gradation depend on the intensity of this interaction. The outcomes confirm the alarming decrease in the amount of forest and silvopastoral cover. These results can be used as the first guide for future studies and decision-makers, focusing on the real drivers of forest and silvopastoral degradation, so as to develop targeted intervention to secure sustainable and sufficient resources needed for animal and population well-being. [less ▲]

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See detailSpatio-temporal behavior of goats in forest pasture of northern Morocco
Chebli, Youssef ULiege; Chentouf, Mouad; Hornick, Jean-Luc ULiege et al

in FARAH (Ed.) Proceeding of the 5th FARAH-Day (2018)

Grazing is associated with significantly different physical activities compared to confined goats. These activities are rarely studied despite their importance in the management and use of pastoral ... [more ▼]

Grazing is associated with significantly different physical activities compared to confined goats. These activities are rarely studied despite their importance in the management and use of pastoral resources. The purpose of this study was to characterize the spatio-temporal movement and the distance travelled by goats in forest pasture of northern Morocco. To accomplish this work, eight goats were equipped with GPS collars, for 3 days during the spring and summer. The grazing area and distance travelled were estimated higher in summer compared to spring. This can be explained by low forage supply in pasture during drought season. The results obtained will be very useful to the enrichment of our database in order to develop a model for the rational management of silvopastoral resources in northern Morocco. [less ▲]

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See detailDiet composition of goats in forest pasture of northern Morocco.
Chebli, Youssef ULiege; Chentouf, Mouad; Hornick, Jean-Luc ULiege et al

in FARAH (Ed.) Proceeding of the 5th FARAH-Day (2018)

In forest pasture, diet selection of goats is affected by the interaction of several factors such as goat characteristics, climate and existing pastoral species. Understanding the diet composition of ... [more ▼]

In forest pasture, diet selection of goats is affected by the interaction of several factors such as goat characteristics, climate and existing pastoral species. Understanding the diet composition of grazing goat will help to improve their productivity. The aim of this study was thus to determine the forage selection and the diet composition of goats grazing in a silvopastoral area in northern Morocco. Direct observation was used as a technique to evaluate grazing behavior of goats, during three consecutive days for three seasons (autumn, spring and summer). The goats spent more grazing time in autumn and summer. During this period, they performed the highest number of total bites. Intake rate and bite weight of palatable species depended significantly to the pastoral species and the season. The shrub was the most important part of the diet of goats. Goat remains an adapted animal to the seasonality of forest vegetation in northern Morocco. [less ▲]

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See detailZootechnical performance of Girolando cattle at Kpinnou Breeding Farm, South-West of Benin Republic
Alassane, Yacoubou; Ahounou, Serge Gbênagnon; Toleba, Soumanou Seibou et al

in Journal of Advanced Veterinary and Animal Research (2018), 5(2), 123-130

Objective: The aim of the study was to assess the weight and reproductive performances of Girolando cattle at Kpinnou Breeding Farm (KBF) in the south western of Benin Republic. Materials and methods: The ... [more ▼]

Objective: The aim of the study was to assess the weight and reproductive performances of Girolando cattle at Kpinnou Breeding Farm (KBF) in the south western of Benin Republic. Materials and methods: The weight performance and body measurements were taken on a total of 150 Girolando cattle. The study of the reproductive traits was based on the recorded demographic indicators between 2012-2013 of 67 cows. Results: From calving to the age of 3 months, the monthly average weight of calves did not vary with the season of calving (P>0.05). Between the 4th and 9th month, the weight varied with the birth seasons and the sex of the calf. Beyond 9th month, the calf’s average weight was the same regardless the calving season. At the age of 24 months, the highest weight (393.33 kg) was obtained during the long rainy season. The highest average weight was 398.22 Kg for males against 364.25 Kg for females at 24 months. The fertility rates ranged from 91.18% to 100% and the fecundity rate ranged from 85.29% to 103% during the study period. The apparent fertility rate was 91.18%. As for the calving and abortion rates, they were 93.55% and 6.45%, respectively. The mortality rate before weaning was 6.90% while the weaning viability was 93.10%. Calving occurred from January to June and from August to December. Conclusion: In overall, the Girolando performances are satisfactory and show a good adaptation at KBF. [less ▲]

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See detailPerformances of local poultry breed fed black soldier fly larvae reared on horse manure
Moula, Nassim ULiege; Scippo, Marie-Louise ULiege; Douny, Caroline ULiege et al

in Animal Nutrition (2018), 4

In poultry, feed based on maggots, like larvae of Black Soldier fly (Hermetia illucens) is an attractive option to substitute current ingredients which are expensive and often in direct or indirect ... [more ▼]

In poultry, feed based on maggots, like larvae of Black Soldier fly (Hermetia illucens) is an attractive option to substitute current ingredients which are expensive and often in direct or indirect competition with human food. Little information is currently available on the utility of these larvae in poultry feed, so goals of this study were to determine whether larvae could be reared on horse manure under traditional farming conditions and to evaluate the growth performances of a local poultry fed these larvae and the fatty acids profiles of their meat. After freezing and thawing, larvae were introduced in the feed of Ardennaise chickens between 30 and 80 days of age. Birds in the control group received a commercial standard feed while those in the treatment group received the same commercial feed in which 8% was substituted with whole fresh larvae corresponding to 2% on a dry matter basis. Mean ± standard errors of larval length and weight were 20.67 ± 2.21 mm and 0.14 ± 0.02 g, respectively. Mean larval percentages of dry matter and of substances extractable in diethyl ether were 24.6% and 23.1%, respectively. Larval fatty acids profiles were predominantly composed of lauric (28.1%) and palmitic (22.0%) acids. Least squares means of weekly weights of chicken, adjusted for the effects of sex, replication and initial weights, were significantly higher (P < 0.05) by 77.03 ± 53.37 g in larvae-fed than in control chickens. All the other measurements were not statistically different between larvae-fed and control chicken, including fatty acid profiles, protein content and ω6/ω3 ratio. In conclusion, the use of black soldier fly larvae in the diet of local chicken breed may be an alternative to the use of soy. [less ▲]

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See detailBy-product Originating from Artisan Distillers of Rice Alcohol in Northern Vietnam: Production, Use and Nutrient Value for Smallholder Pig Raising
Nguyen Cong, Oanh ULiege; Pham Kim, Dang; Do Duc, Luc et al

in World Journal of Agricultural Research (2018), 2

The objective of this study was to investigate by-product production originating from artisan distillers of rice alcohol and its use as pig feed in three provinces (Hai Duong, Hung Yen and Bac Giang) of ... [more ▼]

The objective of this study was to investigate by-product production originating from artisan distillers of rice alcohol and its use as pig feed in three provinces (Hai Duong, Hung Yen and Bac Giang) of Northern Vietnam. A total of 120 rice alcohol producers classified by production scales (30 producers for Large-L, 45 producers for Medium-M and 45 producers for Small-S) were interviewed from January to August 2015. Additionally, sixty-three rice distiller’s by-product samples were collected from the study areas to determine their daily nutrient content according to one week storage time. The annual dry matter feedstuff production was estimated to 4.8, 3.0 and 2.1 tons per household for L, M and S scales, respectively (p<0.001). Swine herd size increased with the scale of household alcohol production (p<0.05). The proportion of rice distiller’s by-product in diet of swine lowered when turning from pregnant to lactating sows, and varied in fattening pigs. Rice distiller’s by-product was rich in high quality crude protein, copper and lactic acid but poor in dry matter. Its nutritive value remained stable over a week under ambient conditions. In conclusion, rice distiller’s by-product provides significant and stable amounts of nutrients in northern vietnamese pig production [less ▲]

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See detailEffects of Pig Diets Containing By-product of Rice Distiller on Growth Performance, Carcass Characteristics and Meat Quality
Nguyen Cong, Oanh ULiege; Do Duc, Luc; Pham Kim, Dang et al

Scientific conference (2017, October 13)

The aim of this study was to evaluate the effects of fattening pig diets containing rice distiller’s by-product (RDP) on growth performance, carcass characteristics and meat quality. A total of 24 ... [more ▼]

The aim of this study was to evaluate the effects of fattening pig diets containing rice distiller’s by-product (RDP) on growth performance, carcass characteristics and meat quality. A total of 24 castrated male crossbred pigs ♂Duroc ×♀(Landrace × Yorkshire) were used for the experiment. Pigs were divided randomly by weight and litter into 3 diets, with 4 replications of 2 pigs in each pen. Pigs were fed one of 3 diets including DAR0 (control), DAR15 (15% RDP in dry matter) and DAR30 (30% RDP in dry matter) during 8 weeks. The results showed that the diets with RDP tended to affect average daily gain (P=0.09) and feed conversion ratio (P=0.08), while feed cost was decreased (P<0.001). Carcass traits was not significantly different between the diets, however back fat thickness was increased by RDP levels (P=0.03). Drip loss of Longissimus dorsi muscle at 24 and 48 hours was increased (P<0.05), whereas there were not effect on pH value and meat color at 45 min, 24 and 48 hours postmortem. Muscle lipid content was increased (P<0.01), whereas protein content was not influenced by RDP in diets. This suggests that using diet with 30% RDP for fattening pigs can improve lipid content of Longissimus dorsi muscle and reduce feed costs while not affecting growth performance and meat quality. [less ▲]

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See detailComparison of the effects of Opuntia ficus-indica powder on growth performance and serum parameters of the Broiler Chicken in Algeria
Moula, Nassim ULiege; Humbel, Maïlis ULiege; Leterrier, Mélanie ULiege et al

Poster (2017, October 13)

In Algeria, the ingredients used in the broiler feed are exclusively imported from abroad, which affects negatively the production cost of the chicken meat and its sale price in the market at national ... [more ▼]

In Algeria, the ingredients used in the broiler feed are exclusively imported from abroad, which affects negatively the production cost of the chicken meat and its sale price in the market at national level. Because of the wide diversity in soil and climate, Algeria has a substantial number of plants which can be used in animal feed. This work is part of the valuation of the feed potential of the barbaric fig tree, widely present in the Algerian rural landscape, for the broiler chicken. The Opuntia ficus-indica is known for its edible fruits and for use of its fleshy leaves or “racquets” as fodder especially during periods of drought. It is also used to control the water and wind erosion as well as for the protection and improvement of soil fertility in arid and semi-arid regions. The aim of this study was to measure the effects of Opuntia ficus-indica powder on growth performance, serum composition and carcass yield of broiler chickens. The experiments were performed in a private poultry farm in the Chemini region (Wilaya de Bejaia). In this study, 120 Ross-308 day-old male chicks were monitored. They were divided in 3 groups (Group 1, 2 and 3) according to the specific diet (4 x 10 chicks / group). The group 1 was offered commercial feed. The group 2 and group 3 were offered the same commercial feed as group 1 but 5% and 10% of the commercial feed was replaced by the Opuntia ficus-indica powder respectively. The Opuntia ficus-indica powder did not show any negative effect (p>0.05) on the final body-weight, average daily gain and carcass yield. However, it decreased (p<0.05) the biochemical parameters -blood concentration- (plasma glucose, uremia, cholesterol and triglycerides). In conclusion, the Opuntia ficus-indica powder has the potential to be used in poultry feed to reduce the cost of broiler feed in Algeria [less ▲]

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See detailThe effect of concentrate allocation on traffic and milk production of pasture based cows milked by an automatic milking system
Lessire, Françoise ULiege; Froidmont, Eric; Shortall, John et al

in Animal (2017), 11(4), 1-9

Increased economic, societal and environmental challenges facing agriculture are leading to a greater focus on effective way to combine grazing and automatic milking systems (AMS). One of the fundamental ... [more ▼]

Increased economic, societal and environmental challenges facing agriculture are leading to a greater focus on effective way to combine grazing and automatic milking systems (AMS). One of the fundamental aspects of robotic milking is cows’ traffic to the AMS. Numerous studies have identified feed provided, either as fresh grass or concentrate supplement, as the main incentive for cows to return to the robot. The aim of this study was to determine the effect of concentrate allocation on voluntary cow traffic from pasture to the robot during the grazing period, to highlight the interactions between grazed pasture and concentrate allocation in terms of substitution rate and the subsequent effect on average milk yield and composition. Thus, 29 grazing cows, milked by a mobile robot, were monitored for the grazing period (4 months). They were assigned to 2 groups: a low concentrate (LC) group (15 cows) and a high concentrate (HC) group (14 cows) receiving 2 kg and 4 kg concentrate per cow per day respectively. Two allocations per day of fresh pasture were provided at 0700h and 1600h. The cows had to go through the AMS to receive the fresh pasture allocation. The effect of concentrate level on robot visitation was calculated by summing milkings, refusals and failed milkings/cow per day. The impact on average daily milk yield and composition was also determined. The interaction between lactation number and month was used as an indicator of pasture availability. Concentrate allocation increased significantly robot visitations in HC (3.60 ± 0.07 visitations/cow per day in HC - 3.10 ± 0.07 visitations/cow per day in LC; P<0.001) while milkings/cow per day were similar in both groups (LC: 2.37 ± 0.02/day - HC: 2.39 ± 0.02/day; ns). The average daily milk yield over the grazing period was enhanced in HC (22.39 ± 0.22 kg/cow per day in HC- 21.33 ± 0.22 kg/cow per day in LC; P<0.001). However the gain in milk due to higher concentrate supply was limited with regards to the amount of provided concentrates. Milking frequency in HC primiparous compared with LC was increased. In the context of this study, considering high concentrate levels as an incentive for robot visitation might be questioned, as it had no impact on milking frequency and limited impact on average milk yield and composition. By contrast, increased concentrate supply could be targeted specifically to primiparous cows. [less ▲]

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See detailEvaluation of the ruminal function of Belgian dairy cows suspected of subacute ruminal acidosis.
Lessire, Françoise ULiege; Knapp, Emilie; Theron, Léonard et al

in Vlaams Diergeneeskundig Tijdschrift (2017), 86(1), 16-23

Subacute ruminal acidosis (SARA) has been considered a major pathology in high producing dairy herds for years. These findings were corroborated by several studies in Europe. However, different feeding ... [more ▼]

Subacute ruminal acidosis (SARA) has been considered a major pathology in high producing dairy herds for years. These findings were corroborated by several studies in Europe. However, different feeding practices and herds’ production levels are found in Southern Belgium. This study aimed to ascertain whether dairy cows of several herds from the south of Belgium (Wallonia) with a suspicion of SARA really did present too low ruminal pH values. Twenty-four herds were visited and 172 cows were sampled using an oropharyngeal device to collect ruminal fluid, i.e. Geishauser probe. On the samples, three tests were performed: pH measurement, methylene blue reduction test and microscopic evaluation of protozoa vitality. Based on these analyses, no cows demonstrated pH values lower than 5.5 and, only ten cows could be considered at risk for SARA. By contrast, in eightteen cows, pH values higher than 7.0 were measured and ruminal inactivity was suspected. In this study, ruminal alkalosis appeared to be more frequently observed than SARA. [less ▲]

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See detailEffect of Cow Dung and Manure of Laying Hens on Growth and Reproduction of Eudrilus eugeniae
Byambas, Patrick ULiege; Lemtiri, Aboulkacem ULiege; Francis, Frédéric ULiege et al

in International Journal of Agriculture and Biology (2017), 19(4), 921-927

The objective of the current study was to compare the effect of cow dung and manure of laying hens, associated to one of the three carbon substrates, on weight and population of this worm. Each substrate ... [more ▼]

The objective of the current study was to compare the effect of cow dung and manure of laying hens, associated to one of the three carbon substrates, on weight and population of this worm. Each substrate was sown with twenty (20) adult worms, 0.7 to 1 g weight. The weight of worms was collected at the beginning and at the end of breeding. The number was collected weekly until 60 days of breeding. The average number of worms was multiplied by 2.38 (60±6.78 in cow dung, 40±6.81 in manure of laying hens and 43 ± 8.23 in control). The average weight of worms was 27.19±1.21, 24.41±1.20, and 22.41±1.44 g, respectively. These results suggest that cow dung is better than manure of laying hens for vermiculture of E. eugeniae. © 2017 Friends Science Publishers [less ▲]

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