References of "Hornick, Jean-Luc"
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See detailFATTY ACIDS PROFILE OF THE DROMEDARY HUMP FAT IN ALGERIA
Sahraoui, Naima; Errahmani, Mohamed Brahim; Dotreppe, Olivier et al

in Journal of Camel Practice and Research (2015), 22(1), 27-32

The fatty acid composition of hump fat stemming from 43 Algerian camels (Camelus dromedarius), 1 to 13 years old, both sexes, belonging to Sahraoui and Tergui breeds, was determined. Saturated fatty acids ... [more ▼]

The fatty acid composition of hump fat stemming from 43 Algerian camels (Camelus dromedarius), 1 to 13 years old, both sexes, belonging to Sahraoui and Tergui breeds, was determined. Saturated fatty acids (SFA) represented 64.4% (weight basis) of total fatty acids, while the monounsaturated (MFA) and polyunsaturated (PUFA) fractions accounted for 33.1 and 2.5%, respectively. The main saturated fatty acids, namely palmitic and stearic acids represented 49.6% and 38.8 % of SFA (31.5% and 25.5% of total fatty acids). Unsaturated fatty acids (UFA) were mainly represented by oleic acid, 78.1% of MFA (25.9% of total fatty acids), linoleic acid which accounted for 88.5% of omega 6 (1.17% of total fatty acids) and linolenic acid accounting for 63.9% of ω3 (0.42% out of total fatty acids). SFA/PUFA was 0.039 and ω6/ω3, 2.81. The levels of fatty acids, SFA and MFA were significantly higher in females, while the contents in ω6, ω3, CLA, PUFA, as well as the PUFA / SFA and ω6/ω3 ratio were comparable in relation to both sexes. When reported to the breeds, the contents in MFA, PUFA and ω6 was higher in Sahraoui, as the ω6/ω3 ratio was. The percentage of SFA, however, was higher in Tergui. [less ▲]

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See detailCorrelation between levels of β-hydroxybutyrate and fatty acids in blood and milk and its impact on ketosis diagnosis in dairy cows
Lessire, Françoise ULiege; Knapp, Emilie ULiege; Dotreppe, Olivier et al

Poster (2015, April 16)

SKC at herd level is difficult to diagnose. Poor production and reproduction performances are usually observed as an increased incidence of periparturient diseases in the herd (Suthar et al., 2013 ... [more ▼]

SKC at herd level is difficult to diagnose. Poor production and reproduction performances are usually observed as an increased incidence of periparturient diseases in the herd (Suthar et al., 2013). Diagnosis methods include determination of beta-hydroxybutyrate (BHB) and increased non-esterified fatty acids (NEFA) resulting from body fat mobilization. BHB and NEFA could be dosed in blood of animals in late gestation and in early lactation. Post calving, cows presenting BHB over 1. 2-1.4 mmol/L are considered SCK-cows while those presenting NEFA over 0.6 mg/L are labelled fat mobilising cows. Development of non-invasive diagnosis techniques could be interesting to sample animals at a larger scale with lesser stress. The aim of this study was to verify whether blood and milk BHB values were correlated and whether diagnostic methods by milk analysis could be developed. Seventy -five cows out of 8 selected Walloon dairy herds were followed up monthly from calving to pregnancy diagnosis regarding production and reproduction. At each visit (V), BHB and NEFA levels were determined in milk and blood. A maximum of 5 V was made. BHB was determined in blood using a cow-side test and in milk by a colorimetric test . Blood NEFA and milk fatty acids were determined by gas chromatography (GC). Statistical analysis was performed by SAS 9.1. BHB levels in blood and milk were highly correlated (r= 0.86), indicating the possibility of diagnosis of SCK by milk sampling. The earliest the samples have been taken, the better the correlation is (r=0.95 V1; r = 0.91 V2). Comparison of BHB with NEFA demonstrated a better correlation with milk BHB than with blood BHB (respectively 0.51 and 0.53 in milk vs 0.41 and 0.48 in blood for the V1 and V2 respectively). After the 2d V, the correlation dropped to 0.38 (V3) and -0.14 (V4).To conclude, dosage of milk BHB could be a good indicator for ketosis diagnosis taking into account that correlation with blood BHB and with NEFA is time-related. [less ▲]

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See detailImpact d’une supplémentation en P. acidilactici sur le profil des acides gras du sérum de poulets de chair
Sahraoui, Naima; Brahim Errahmani, Mohamed; Dotreppe, Olivier et al

in Pratiques en nutrition (2015), 42

This study was conducted to determine the effect of probiotic Pediococcus acidilactici on the fatty acid profile of the serum of broilers. In the experimental group chicks received an additional ... [more ▼]

This study was conducted to determine the effect of probiotic Pediococcus acidilactici on the fatty acid profile of the serum of broilers. In the experimental group chicks received an additional Pediococcus acidilactici added to drinking water. The results showed that probiotics can be used to improve the profile in acid fatty in meat of broilers. [less ▲]

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See detailRumination time, milk yield, milking frequency of grazing dairy cows milked by a mobile automatic system during mild heat stress
Lessire, Françoise ULiege; Hornick, Jean-Luc ULiege; Minet, Julien ULiege et al

in Advances in Animal Biosciences (2015), 6(01), 12-14

Grazing dairy cows milked by an automatic system (AS) experienced mild heat stress (HS) periods, twice during the summer. The daily temperature humidity index (THI) during these periods were higher than ... [more ▼]

Grazing dairy cows milked by an automatic system (AS) experienced mild heat stress (HS) periods, twice during the summer. The daily temperature humidity index (THI) during these periods were higher than 72. Milk production, as well as milking frequency, rumination time and milk fat to protein ratio (F/P) during these periods were compared to adjacent periods with mean THI of 61. The daily milking frequency, the total number of visits to AS and the milk production were significantly higher in HS periods (2.12 vs 1.97, 2.99 vs 2.69, and 19.7 vs 18.5 kg milk per cow, respectively). There were significant interactions between times and periods for milking frequency and number of visits, while the daily rumination time was significantly lower (339 vs 419 min) and the F/P in milk tended to be decreased (1.17 vs 1.23). These results could be explained by changes in cow behaviour during HS periods. [less ▲]

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See detailEffect of Improved Feeding and Housing, Friesian Blood Level and Parity on Milk Production of Ankole x Friesian Crossbred Cows
Kibwana, D. K.; Makumyaviri, A. M.; Hornick, Jean-Luc ULiege

in Pakistan Veterinary Journal (2015), 35(1), 76--80

In North Kivu, D.R. Congo, cattle are raised in extensive systems based on local breeds and crossbreds. This farming method affects the performance of dairy animals and mortgages the level of milk ... [more ▼]

In North Kivu, D.R. Congo, cattle are raised in extensive systems based on local breeds and crossbreds. This farming method affects the performance of dairy animals and mortgages the level of milk consumption in population. An improved farming system, including feed supplementation, Friesian cross-breeding and the sheltering of animals in stalls at night, was studied to evaluate its effect on milk production by Ankole x Friesian crossbreds. The study was performed in Beni, D.R. Congo, on two groups of 15 animals (control group-CoG and improved group-IG), homogeneous according to Friesian blood and parity levels. The improved system, Friesian blood and parity levels increased significantly milk production (P<0.001). Farming system increased milk production by 1.6 l/d (5.2 l/d vs 6.8 l/d respectively in CoG and IG). Milk production ranged from 5.3±0.04 l/d to 6.6±0.02 l/d and from 4.9±0.02 l/d to 7.2±0.02 l/d according, respectively, to Friesian blood level and parity. A significant interaction was observed between farming system and Friesian blood level, and between farming system and parity (P<0.001). The two groups were characterized by a fair adaptation to forage availability associated to climatic factors. The study showed the importance of genetic and environmental factors on the milk production of crossbred dairy cows of the region. [less ▲]

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See detailEffect of complementation of Setaria palidefusca and Imperata cylindrica with Adenodolichos rhomboideus, Stylosanthes guianensis or Leucaena leucocephala on growth of local goat at Lubumbashi
Muamba, Innocent Tshibangu; Mangueye, Honoré Kiatoko; Hornick, Jean-Luc ULiege

in Livestock Research for Rural Development (2015), 27(03),

The feeding of ruminants in the Democratic Republic of Congo is based on the use of natural vegetation. This vegetation is characterised by grasses and rarely legumes. In addition to this, the lack of ... [more ▼]

The feeding of ruminants in the Democratic Republic of Congo is based on the use of natural vegetation. This vegetation is characterised by grasses and rarely legumes. In addition to this, the lack of legumes in the southern part of the country means that the dry season becomes longer (over 6 months). This leads farmers with the financial means, to use commercial foods, most of which are imported. Grasses which form the basis of forage remain as straws in the dry season. They have a digestibility of less than 45%, and are very low in nitrogen and phosphorus, as well as other minerals, which further limits their feed intake (Chenost and Kayouli 1997; Jarrige 1987). The use of locally available protein banks to supplement poor foods is therefore essential. In the same region, soils are increasingly contaminated with heavy metals from mining activities. The choice of sustainable and high protein plant species should be dictated by their adaptation to environmental conditions, including high levels of heavy metals in soil. They must also be adapted to the long dry season and provide fodder throughout the year. Among the species encountered, Adenodolichos rhomboideus is the most resistant to drought and is widespread in the region (INEAC 1954). It grows on normal soil or that contaminated by heavy metals (Faucon 2009; Meerts 2008 and Tshibangu et al 2014c). Two other species, Leucaena leucocephala and Stylosanthes guianensis are durable and are used in ruminant diets, but are neither widespread nor adapted to the contaminated soil Tshibangu et al 2014ab. The objective of this study was to compare the use of A. rhomboideus, L. leucocephala and S. guianensis forage as a complement to grass hay on the growth of local goats at Lubumbashi. [less ▲]

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See detailEffect of complementation of Setaria palidefusca and Imperata cylindrica with Adenodolichos rhomboideus, Stylosanthes guianensis or Leucaena leucocephala on growth of local goat at Lubumbashi
Tshibangu Muamba, Innocent; Kiatoko Mangueye, Honoré; Hornick, Jean-Luc ULiege

in Livestock Research for Rural Development (2015), 27(3), 1-7

Hays of graminaceous species (I. cylindrica and S. palidefusca) of low quality (30g/kg dry matter (DM) Crude Protein (CP) was offered to 16 goats (8 males, 8 females), alone or with one of three tropical ... [more ▼]

Hays of graminaceous species (I. cylindrica and S. palidefusca) of low quality (30g/kg dry matter (DM) Crude Protein (CP) was offered to 16 goats (8 males, 8 females), alone or with one of three tropical leguminous plants (153g/kg, 104g/kg and 305,6g/kg DM respectively). The supplementation increased total DM, energy and CP intakes and consequently allowed the weight of the goats to increase. The fodder of L. leucocephala gave the best results, while that of S. guianensis gave the lowest. Fodder of A. rhomboideus is a potential nitrogen-source supplement for poor fodder in the dry season for ruminants. [less ▲]

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See detailMeat composition and quality of young growing Belgian Blue bulls offered a fattening diet with selenium enriched cereals
Mehdi, Youcef ULiege; Clinquart, Antoine ULiege; Hornick, Jean-Luc ULiege et al

in Canadian Journal of Animal Science (2015), 95(3), 465-473

The objective of this study was to evaluate the effects of selenium (Se) enrichment of cereals on Belgian Blue bulls performance, on meat quality and chemical composition. Twenty three bulls were used in ... [more ▼]

The objective of this study was to evaluate the effects of selenium (Se) enrichment of cereals on Belgian Blue bulls performance, on meat quality and chemical composition. Twenty three bulls were used in the present study. Twelve bulls were offered a control diet containing Se at a basal concentration of 58 µg kg-1 of dry matter (DM) and the other 11 bulls given a diet containing 173 µg kg-1DM of Se by means of Se enriched spelt and barley. The Se enrichment of the diet did not affect either the growth performance, the slaughter data or meat quality (p>0.05). There were no effects of Se on tenderness, oxydative rancidity and water losses. However, there were some effects of Se enrichment on the meat chemical composition. The ether extract was decreased from 2.1 to 1.7% DM (p<0.05). There were also significant Se enrichment (p < 0.001) in Longissimus thoracis muscle (177 vs 477 ng g1-DM) and organs: liver (474 vs 1126 ng g1-DM) and kidney (4956 vs 5655 ng g1-DM), Under such condition, the human consumption of a piece of such meat or liver can cover a large part of the recommended daily Se intake estimated between 30 to 57%. [less ▲]

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See detailEffect of improved feeding and housing, Friesian blood level and parity on milk production of Ankole x Friesian cows
Kibwana, Denise Katungu; Makumyaviri, A.M.; Hornick, Jean-Luc ULiege

in Pakistan Veterinary Journal (2015), 35(1), 76-80

In North Kivu, D.R. Congo, cattle are raised in extensive systems based on local breeds and crossbreds. This farming method affects the performance of dairy animals and mortgages the level of milk ... [more ▼]

In North Kivu, D.R. Congo, cattle are raised in extensive systems based on local breeds and crossbreds. This farming method affects the performance of dairy animals and mortgages the level of milk consumption in population. An improved farming system, including feed supplementation, Friesian cross-breeding and the sheltering of animals in stalls at night, was studied to evaluate its effect on milk production by Ankole x Friesian crossbreds. The study was performed in Beni, D.R. Congo, on two groups of 15 animals (control group-CoG and improved group-IG), homogeneous according to Friesian blood and parity levels. The improved system, Friesian blood and parity levels increased significantly milk production (P<0.001). Farming system increased milk production by 1.6 l/d (5.2 l/d vs 6.8 l/d respectively in CoG and IG). Milk production ranged from 5.3±0.04 l/d to 6.6±0.02 l/d and from 4.9±0.02 l/d to 7.2±0.02 l/d according, respectively, to Friesian blood level and parity. A significant interaction was observed between farming system and Friesian blood level, and between farming system and parity (P<0.001). The two groups were characterized by a fair adaptation to forage availability associated to climatic factors. The study showed the importance of genetic and environmental factors on the milk production of crossbred dairy cows of the region. [less ▲]

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See detailEffect of bovine colostrum on growth and survival in Red kids during the first year of life.
Abdou, Harouna ULiege; Marichatou, Hamani; Beckers, Jean-François ULiege et al

Poster (2014, October 17)

The aim of this work was to measure the effect of supplementation with bovine colostrum among newborn Red goats breastfed in breeding conditions for semi-intensive type of Niger. The study was conducted ... [more ▼]

The aim of this work was to measure the effect of supplementation with bovine colostrum among newborn Red goats breastfed in breeding conditions for semi-intensive type of Niger. The study was conducted in Secondary Goat Breeding Center of Maradi (SGBCM). Forty newborn kids, regardless of sexe, were divided randomly into two groups: a "T-Control " group receiving only breast milk per feeding (n = 20) and a "C-Colostrum" group having the same diet but supplemented with bovine colostrum thawed (50 ml the first day of life, then 25 ml in 2 meals/ day between the ages of 2 and 15d, n = 20). The results indicate that supplementation with bovine colostrum in the first 15 days of life, increases the growth of kids until weaning (P<0.001), modifie some barymetric changes some settings improves health status and reduces the mortality rate. To our knowledge, in the studied environment, this work is original and seems to bring new knowledges likely to have practical applications in areas with farming conditions quite difficult. [less ▲]

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See detailEffects of concentrate level on milk production and traffic of grazing cows milked by a mobile automatic milking system on pasture
Lessire, Françoise ULiege; Hornick, Jean-Luc ULiege; Dufrasne, Isabelle ULiege

in Hopkins, Alan; Collins, Rosemary; Fraser, Marieacia (Eds.) et al EGF at 50: The future of European Grasslands (2014, September 10)

Cows milked by an automatic milking system in pastures were assigned in 2 groups receiving different amounts of concentrates (2.1 kg vs 4.1 kg). The effect of concentrates’ level on milk yield (MY) and ... [more ▼]

Cows milked by an automatic milking system in pastures were assigned in 2 groups receiving different amounts of concentrates (2.1 kg vs 4.1 kg). The effect of concentrates’ level on milk yield (MY) and returns to the robot was assessed. Concentrates’ level had a positive influence on daily milk production over the grazing period as cows of low concentrates group produced 21.43 ± 0.62 kg compared with 24.33 ± 0.62 kg in high concentrates group. However this effect was modulated subsequently to grass quality and availability. Regarding daily voluntary returns to the robot, high concentrates group showed higher frequency (3.66 ± 0.05, compared with 3.22 ± 0.04 in low concentrates group) demonstrating positive impact of complement distribution on cows’ traffic. [less ▲]

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See detailEffects of mild heat stress periods on milk production, milking frequency and rumination time of grazing cows milked by an automatic milking system
Lessire, Françoise ULiege; Hornick, Jean-Luc ULiege; Dufrasne, Isabelle ULiege

in Hopkins, A; Collins, Rosemary; Fraser, Mariecia (Eds.) et al EGF at 50: The future of European grasslands (2014, September 10)

Grazing dairy cows milked by an automatic system (AS) experienced mild heat stress (HS) periods, twice during the summer. The daily temperature humidity index (THI) during these periods were higher than ... [more ▼]

Grazing dairy cows milked by an automatic system (AS) experienced mild heat stress (HS) periods, twice during the summer. The daily temperature humidity index (THI) during these periods were higher than 72. Milk production, as well as milking frequency, rumination time and milk fat to protein ratio (F/P) during these periods were compared to adjacent periods with mean THI of 61. The daily milking frequency, the total number of visits to AS and the milk production were significantly higher in HS periods (2.12 vs 1.97, 2.99 vs 2.69, and 19.7 vs 18.5 kg milk per cow, respectively). There were significant interactions between times and periods for milking frequency and number of visits, while the daily rumination time was significantly lower (339 vs 419 min) and the F/P in milk tended to be decreased (1.17 vs 1.23). These results could be explained by changes in cow behaviour during HS periods. [less ▲]

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See detailGestión por los actores locales de los recursos físicos, vegetales y animales, para el desarrollo sostenible y la calidad de vida. Una experiencia interdisciplinaria en el valle del Draa, Marruecos
Hornick, Jean-Luc ULiege

Scientific conference (2014, September 08)

In 2001, an interdisciplinary team, composed of 22 scientists, developed a methodology aiming at analyzing problems of water resources in Vallée du Draa (Morocco). The issue was studied through 4 points ... [more ▼]

In 2001, an interdisciplinary team, composed of 22 scientists, developed a methodology aiming at analyzing problems of water resources in Vallée du Draa (Morocco). The issue was studied through 4 points of view: (i) disponibility of water, according to a hydrogeological evaluation of the region, (ii) mechanic, technic and physic access to water, taking into account political, cultural and financial sovereign, allowing to guarantee access to water at the levels of nation, region, locality, family and individual, (iii) quality of water and its evolution – rainy, superficial, underground, residual water, water for agriculture and breeding, (IV) efficiency and profitability of water. Water needs appeared to be higher that available resources. Rainy and superficial water supplies appeared to be weak and poorly distributed in time. Strong seasonal change in the level of phreatic layer suggested an overexploitation of aquifers. Valleys were characterized by sedimentation of irrigation canals, exploitation of underground water, remoteness and dispersion of agricultural areas. Social and gender equitability in water distribution and access were poor, leading to desertion and emigration. Water quality was considered as poor. It can be concluded that palm groves allows populations to maintain in an area. Sustainability of the system depend on water access, water quality and profitability. Survival of the system depends on irrigation, rights to water access, and presence of water of quality. [less ▲]

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See detailProduction of animal protein in the Congo Basin, a challenge for the future of people and wildlife
Moula, Nassim ULiege; Hornick, Jean-Luc ULiege; Ruppol, Patrick ULiege et al

in RAMMELOO, J.; VAN DE VIJVER, B.; GOYENS, P. (Eds.) International Conference ‘Nutrition and Food Production in the Congo Basin’. Brussels, Belgium (2014)

Protein needs are considerable in the Congo Basin, a vast territory dominated by forest and inhabited by tens of millions of people. Whereas over 85% of the DRC’s population of the Basin live in the ... [more ▼]

Protein needs are considerable in the Congo Basin, a vast territory dominated by forest and inhabited by tens of millions of people. Whereas over 85% of the DRC’s population of the Basin live in the forest, the situation is different in other countries where the majority is urban (Cameroon, Central African Republic, Congo and Gabon). This paper presents several achievements of the Centre for Tropical Agriculture and Veterinary Medicine in Kinshasa (CAVTK), which aims since 2001 to conduct pilot projects in animal husbandry and agriculture, highlighting the skills of the Belgian universities, breeders and entrepreneurs. Different production runs are presented, going from the cattle ranching operations in Katanga, poultry breeding in Bas-Congo, through rabbits in Butembo, mini-livestock and insects. [less ▲]

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See detailToxicité et détoxification biologique du tourteau de Jatropha curcas L. pour une utilisation en alimentation animale : Synthèse bibliographique
Nesseim, T.D.T.; Dieng, A.; Mergeai, Guy ULiege et al

in Revue Africaine de Santé et de Productions Animales (2014), 12(3-4), 143-149

The Jatropha curcas L. non edible oïl seeds for biofuel production results in the generation of large amounts of cake. The latter is an excellent source of dietary nutrients that contains between 45.8 and ... [more ▼]

The Jatropha curcas L. non edible oïl seeds for biofuel production results in the generation of large amounts of cake. The latter is an excellent source of dietary nutrients that contains between 45.8 and 63,8 % crude proteins compared to the dry matter. However, it contains toxic components (curcin and phorbol esters) and anti-nutrients (protein inhibitors trypsin, phytates and saponins) that limit its use in animal nutrition. Different methods have been used to detoxify the meal including thermal and chemical processes based on various alcoholic solvents. However, the implementation of biological processes trough the use of fungi, bacteria or enzyme complexes, allows not only a significant reduction of toxics and anti-nutritionnals compounds, but in most cases, improves the nutritional value of the cake and therefore its use in animal feed. [less ▲]

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See detailCharacterization of fatty acids camel meat in Algeria
Sahraoui, Naima; Dotreppe, Olivier; Errahmani, M. B. et al

in Cahiers de Nutrition et de Diététique (2014), 49(15), 231-234

The fatty acids of camel meat were characterized by 54.6% of saturated fatty acids (SFA), 35.0% of mono-unsaturated fatty acids (MFA) and 10.4% of polyunsaturated fatty acids (PUFA). The polyunsaturated ... [more ▼]

The fatty acids of camel meat were characterized by 54.6% of saturated fatty acids (SFA), 35.0% of mono-unsaturated fatty acids (MFA) and 10.4% of polyunsaturated fatty acids (PUFA). The polyunsaturated/saturated ratio was found equal to 0.25, that of ω6/ω3 equal to 4.1. The comparison by age showed no significant effect on the contents of FA, SFA, MFA, PUFA, ω6 and ω3 (P > 0.05). The comparison by gender and race has revealed highly significant effectsalmost on all studied parameters. Thus, the contents of the FA, SFA, MFA, PUFA, ω6 and ω3 werefound significantly higher in the Sahrawi males (P < 0.05). The females, Sahrawi as well as Tergui, have exhibited PUFA/SFA and ω6/ω3 ratios significantly higher than males (P < 0.05), but alsorelatively low levels of lipids and ω6/ω3 ratios deemed favorable. These results suggest betteroverall nutritional characteristics, essentially in females, and the importance of promoting thismeat for products of particular nutritional characters. [less ▲]

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See detailSelenium status in cattle herds in Wallonia (Belgium): overview and health management
Mehdi, Youcef ULiege; Cabaraux, Jean-François ULiege; Hornick, Jean-Luc ULiege et al

in Veterinary World (2014), 7(12), 1144-1149

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