References of "Hornick, Jean-Luc"
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See detailEffect of Dietary Energy on Productive and Reproductive Performance of Algerian Local Rabbit Does and Their Litters
Saidj, Dahia; Ainbaziz, H.; Salhi, O. et al

in Animal Nutrition and Feed Technology (in press)

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See detailĐánh giá tiềm năng bã rượu làm thức ăn chăn nuôi lợn nông hộ tại ba tỉnh phía Bắc
Nguyen Cong, Oanh ULg; Pham Kim, Dang; Vu Dinh, Ton et al

in Journal of Science and Development (2016), 14(1), 79-86

In order to evaluate the potential of the rice distiller’s by-product for use as feed, the chemical composition and nutritive value, and its utilisation in pig production, 120 rice alcohol producers were ... [more ▼]

In order to evaluate the potential of the rice distiller’s by-product for use as feed, the chemical composition and nutritive value, and its utilisation in pig production, 120 rice alcohol producers were surveyed and 18 samples of rice distiller’s by-product were collected from 3 traditional alcohol villages belonging to 3 different provinces in the North of Viet Nam (Hai Duong, Hung Yen and Bac Giang). The study results showed that rice distillers’ by product was produced in large quantity and available the whole year round in households surveyed (8.266 kg DM/household/year). The majority of this by-product was used for pig production. The rice distiller’s by-product use in feed ration varied between 11- 40% DM and 11-50% DM for sows and fattening pigs, respectively. For the sows, this by-product used in diet gradually reduced from pregnancy to milking sows. For the fattening pigs, its by-product is used continuously from piglet to finishing stage. Rice distiller’s by-product was high in protein, NDF (% DM) and energy (28.18%, 29.93% and 4.866,67 kcal/kg, respectively) but low in dry matter (DM) (11.04%). The low pH value (3.19) and high lactic acid ratio (2.31 g/100 g sample) might help improve digestive health and prevent intestinal diseases. [less ▲]

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See detailMilk production, milking frequency and rumination time of grazing dairy cows milked by a mobile milking robot.
Lessire, Françoise ULg; Hornick, Jean-Luc ULg; Minet, Julien ULg et al

in Conington, J; Klopcic, M; Lauridsen, C (Eds.) et al Book of abstracts of the 66th Annual meeting of the European Federation of animal science (2015, September 28)

In Europe, analysis of meteorological data shows that the average temperature has increased by ~1°C over the past hundred years (IPCC, 2013). Heat stress periods are thus expected to be more frequent even ... [more ▼]

In Europe, analysis of meteorological data shows that the average temperature has increased by ~1°C over the past hundred years (IPCC, 2013). Heat stress periods are thus expected to be more frequent even in temperate areas. The use of an automatic milking system (AMS) implies the need to stimulate cows’ traffic to the robot, especially with grazing cows. Describing how heat stress influenced cows’ traffic to the robot is the aim of this study. Grazing dairy cows milked by an automatic system (AMS) experienced heat stress (HS) periods, twice during the summer 2013 in July (J) and August (A). The daily temperature humidity index (THI) during these periods were higher than 75. Each HS period was compared with a “normal period”(N), presenting the same number of cows, similar lactation number, days in milk, distance to come back to the robot and an equal access to water. The first HS period of 5 days with a mean THI of 78.4 was chosen in J, and a second that lasted for 6 days in A with a THI value of 77.3. Heat stress periods were cut off with the same duration of days with no stress (N) and mean THI <70. Milk production, milkings and refusals to the robot during HS were compared with N periods. Milkings and refusals were significantly more numerous in HS periods in July (HS: 2.54 ± 0.11 vs N: 2.19 ± 0.08, 1.87 ± 0.20 vs 0.72 ± 0.16) but milk production dropped from 21.8 ±0.6 kg per cow and per day during N periods to 18.9 ± 0.8 kg in HS. In August, MY increased slightly during HS. This could be explained by less high ambient temperatures and decreased distance to walk inducing less energy expenditure. The increase in milkings and refusals to the robot during HS could be linked to water availability nearby the robot and confirmed previous findings (Lessire et al., 2014). [less ▲]

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See detailDigestibility of solvent-treated Jatropha curcas kernel by broiler chickens in Senegal
Nesseim, Thierry Daniel Tamsir; Dieng, Abdoulaye; Mergeai, Guy ULg et al

in Tropical Animal Health and Production (2015)

Jatropha curcas is a drought-resistant shrub belonging to the Euphorbiaceae family. The kernel contains approximately 60 % lipid in dry matter, and the meal obtained after oil extraction could be an ... [more ▼]

Jatropha curcas is a drought-resistant shrub belonging to the Euphorbiaceae family. The kernel contains approximately 60 % lipid in dry matter, and the meal obtained after oil extraction could be an exceptional source of protein for family poultry farming, in the absence of curcin and, especially, some diterpene derivatives phorbol esters that are partially lipophilic. The nutrient digestibility of J. curcas kernel meal (JKM), obtained after partial physicochemical deoiling was thus evaluated in broiler chickens. Twenty broiler chickens, 6 weeks old, were maintained in individual metabolic cages and divided into four groups of five animals, according to a 4 × 4 Latin square design where deoiled JKM was incorporated into grinded corn at 0, 4, 8, and 12 % levels (diets 0, 4, 8, and 12 J), allowing measurement of nutrient digestibility by the differential method. The dry matter (DM) and organic matter (OM) digestibility of diets was affected to a low extent by JKM (85 and 86 % in 0 J and 81 % in 12 J, respectively) in such a way that DM and OM digestibility of JKM was estimated to be close to 50 %. The ether extract (EE) digestibility of JKM remained high, at about 90 %, while crude protein (CP) and crude fiber (CF) digestibility were largely impacted by JKM, with values closed to 40 % at the highest levels of incorporation. J. curcas kernel presents various nutrient digestibilities but has adverse effects on CP and CF digestibility of the diet. The effects of an additional heat or biological treatment on JKM remain to be assessed. [less ▲]

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See detailIs it possible for large herds to graze while keeping a high milk yield level? The experience of two Belgian dairy farms.
Lessire, Françoise ULg; Hornick, Jean-Luc ULg; Dufrasne, Isabelle ULg

in van den Pol-van Dasselaer, Agnes; Aarts, H.F.M; De Vliegher, Alex (Eds.) et al Grassland and forages in high output dairy farming systems (2015, June 15)

Grazing is more and more abandoned because of increasing size of herds and automation of herd management (e.g. automatic milking system – AMS). In this context, this study aims to evaluate milk production ... [more ▼]

Grazing is more and more abandoned because of increasing size of herds and automation of herd management (e.g. automatic milking system – AMS). In this context, this study aims to evaluate milk production and composition of 2 large Belgian dairy herds equipped with AMS during winter and summer. These herds were followed over 2 years. At grazing, 30% of the offered feed was grass. Milk production in both herds was similar in summer and winter (30.2 ± 7.14 vs 29.7 ± 7.8 ± in Herd 1 and 26.9 ± 0.8 vs 26.4 ± 0.8 in Herd 2) while their milk composition differed. In conclusion, it is possible for grazing to be preserved even in large herds without impacting noticeably on the herd performance. [less ▲]

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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 ULg; Knapp, Emilie ULg; 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 ULg; Hornick, Jean-Luc ULg; Minet, Julien ULg 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 detailMeat composition and quality of young growing Belgian Blue bulls offered a fattening diet with selenium enriched cereals
Mehdi, Youcef ULg; Clinquart, Antoine ULg; Hornick, Jean-Luc ULg 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 ULg

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 ULg; Marichatou, Hamani; Beckers, Jean-François ULg 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 ULg; Hornick, Jean-Luc ULg; Dufrasne, Isabelle ULg

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 ULg; Hornick, Jean-Luc ULg; Dufrasne, Isabelle ULg

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 ULg

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 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 ULg 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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