https://dspace.univ-ouargla.dz/jspui/handle/123456789/3993 2026-04-09T20:39:12Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/5571 Titre: ANALYSE DES CONDITIONS DE TRAITE EN ELEVAGE BOVIN HORS SOL DANS LE BERCEAU LAITIER DE MAHDIA (TUNISIE) Auteur(s): M SADAK Y; HAMED; KRICHI A; KRAIEM K Résumé: The aim of this study is to assess hygienic, technical and technological conditions of dairy milking to evaluate later their impact on cow’s health in non-grazing cattle herds in semi-arid. The study was achieved on a sample of 48 small herds in the region of Boumerdes, the cradle dairy of Mahdia (The Tunisian Sahel).The hygienic and technical monitoring of milking sites had affected the entire sample of farmers. The visual examination and partial testing of the 39adopted milking machines was implemented to appreciate their chosen technology and maintaining in working. It is clear from the evaluation of sites that the majority of farmers ensure milking in calm conditions respecting the rapid and the complete milking. However, 43% of farmers clean cows’ teats before milking, 42% don’t wipe cow’s udder,71%do not control fore milk before milking and all breeders are unaware of teats disinfection after milking. In addition, more than half of the farmers don’t practice a hygienic milking. The sample of milking machines showed that 14% of the mdo not respond the minimum required power, and the minimum capacityto50kPais consistent, regardless of the vacuum pump. All milking machines are equipped with a pneumatic pulsator, but only 18% of them had a pulse frequency according to the standard. The partial testing showed that 29% of machines had vacuum milking was below standard, and the majority of pulsators (79%) were defective. Description: Revue des bio ressources 2013-12-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/5568 Titre: LABORATORY STUDY OF THE EFFECT OF HEXADECANOL MONOLAYER ON THE AQUATIC FAUNA (CASE OF Tilapia nilotica) Auteur(s): SAGGAÏ S; SAGGAÏ M.M; HANCOCK N Résumé: The present study aimed to investigate the effect of monolayer on the larva of Tilapia nilotica. An experiment was device consisted of 174 larva distributed in three aquariums during five weeks was installed. The first aquarium was not covered by the monolayer and considered as the control, the second one was covered by a monolayer of Hexadecanol (quantity of 0,09 g/m2) and The last aquarium was covered by a monolayer of the same alcohol (quantity of 0,15 g/m2). The results showed that the monolayer did not have a big effect on the physical parameters of the aquatic environment, but it affected the dissolved oxygen and delayed the growth of larva (size and weight) without killing them. Description: Revue des bio ressources 2013-12-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/5579 Titre: CARACTERISATION PHYSICO-CHIMIQUE DU COLOSTRUM CAMELIN (Camelus dromedarius) Auteur(s): NILI M; BEN MOHAMED C; BOUAMEUR N Résumé: The studies have proved that the camel colostrum has a particular interest for both the camel calf and nomads and southern populations because it satisfies their requirements given its high content of basic nutrients (proteins, lipids, and lactose) as well as vitamin C. It is also characterized by its powerful natural protective system (lactoperoxidase, lactoferrin, immunoglobulins and proteose-peptones3), thus distinguishing it from bovine colostrum. The purpose of this work is the characterization of this bio-product by performing physicochemical analyzes on a sample taken in Zone of Taïbat Ouargla and compares them with those of a sample of bovine colostrum. The results have revealed that the pH of camel colostrum is 6.50 ± 0.13, acidity Dornic is 14.5 ± 0.01, so less acid that bovine colostrum, the density is higher than that of bovine colostrum of the order of 1.049 ± 0.001, the total dry matter content is slightly reduced compared to that of bovine colostrum estimated to 120 ± 0.032 g / l, the quantity of lipids is much lower than that of bovine colostrum and estimated to 40 ± 0.00 g/l, and the ashes of the order of 6.5 ± 0.0057 g / l. This colostrum is essentially characterized by very high rates of vitamin C and proteins. The value of vitamin C is more than 2,5 that found in bovine colostrum (the average value is estimated to be 84.48 ± 8.01 mg / l) and the value of protein is evaluated in the order of 55.5 ± 3.5 g / l. Description: Revue des bio ressources 2013-12-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/5572 Titre: EFFET DE LA SAISON SUR LA REPRISE DES ACTIVITES OVARIENNE ET OESTRALE APRES LE PART CHEZ LA BREBIS OULED DJELLAL Auteur(s): BENYOUNES A; LAMRANI F Résumé: The objective of the trial was to evaluate the effect of season on the resumption of ovarian and estrus activity after parturition in ewes Ouled Djellal. The study was conducted in the east of Algeria -36 ° 28 'north latitude and 7 ° 28' east longitude-, about 41 ewes lambed in the spring (20) and autumn (21) and their lambs were weaned at 45 days of age. Ovarian activity of ewes was examined by analysis of alternating progesterone levels, determined by radioimmunoassay, following blood tests carried out between 25-60 days post-partum. Daily estruses were controlled with rams since the 60th day postpartum. Whatever the season, the renewal of ovarian activity of ewes, very favorable for the autumn (P < 0.001) was observed after the end of exclusive suckling time (day 30). Indeed, the recovery of spontaneous cyclical ewes after parturition was related to their lambing season. Thus, the shortest duration of postpartum anoestrus was obtained with autumn lambing (P < 0.001). Description: Revue des bio ressources 2013-12-01T00:00:00Z