Performances zootechniques du poulet de chair soumis à un régime à base de résidus de semoule de manioc supplémenté par la spiruline (Spirulina platensis)

Cette étude a été réalisée pour évaluer les performances zootechniques d’un régime alimentaire à base de résidus de semoule de manioc supplémentés par la spiruline chez les poulets de chair. Trois (03) groupes de poussins de souche Arbor Acres soumis aux rations témoins supplémentées ou non par la spiruline ont été comparés à neuf (09) autres groupes soumis aux rations dans lesquelles le maïs a été substitué par les résidus de semoule de manioc aux taux de 50, 75, et 100% et supplémentés par 0,5 ou 1% de spiruline. Les principaux résultats ont montré que tous les paramètres de croissance se détériorent avec le taux croissant d’incorporation de résidus de semoule de manioc supplémentés ou non par la spiruline. L’indice de consommation a augmenté de l’ordre de 10; 10 et 15% respectivement avec 50, 75 et 100% de substitution du maïs dans la ration. Le rendement carcasse, le poids relatif de la tête, des pattes, du foie, du coeur, du pancréas et de la graisse abdominale évolue en dents de scie d’un traitement à l’autre. Les résidus de semoule de manioc peuvent avantageusement être supplémentés par la spiruline au taux de 0,5% dans l’aliment des poulets de chair.© 2015 International Formulae Group. All rights reserved.Mots clés: Maïs, manioc, poulets de chair, spirulineEnglish Title:  Zootechnical performances of broiler chickens fed on Spirulina platensis-supplemented cassava root waste based dietEnglish AbstractThis study investigated the growth performances of broiler chickens fed on spirulina-supplemented cassava root waste based diet. Three (03) groups of Abor Acres chicks fed on control diets supplemented or not with spirulina were compared to nine (09) other groups fed on diets in which 50, 75 and 100% of maize were replaced by cassava root waste supplemented or not with 0.5 and 1% spirulina in a completely randomized design. Results revealed that growth parameters including feed intake, weight gain and feed conversion ratio  (FCR) depressed with increasing level of cassava root waste in the diet. FCR was poorer by 10, 10 and 15% respectively with 50, 75 and 100% of maize replaced with cassava root waste. Nevertheless, supplementing with spirulina, irrespective to the level of cassava root waste inclusion, demonstrated a production advantage. Carcass yield and relative weight of organs varied from one experimental diet to another. In conclusion, cassava root waste can be beneficially supplemented with spirulina at 0.5% in broiler diets.© 2015 International Formulae Group. All rights reserved.Keywords: Broiler chickens, cassava, maize, spirulin

Effects of dietary energy level on reproductive characteristics in male African giant rat Cricetomys gambianus

Background: The study was conducted to assess the effects of the digestible dietary energy level on some reproductive characteristics in African giant rat.Methods: Sixteen young males were randomly distributed into 4 groups of 4 animals each. To each group was attributed randomly one of the 4 dietary energy levels (3600 Kcal/kg, 3800 Kcal/kg, 4000 Kcal/kg or 4200 Kcal/kg). The daily distribution of experimental diets last six months, ie ended when cricetoma were 8 months old. At the end of that period, all animals were sacrificed.Results: Results showed an increase in testes weight with the augmentation of dietary digestible energy level (0.79±0.13, 0.88±0.17, 1.02±0.28 and 1.02±0.16 respectively for 3600 Kcal/kg, 3800 Kcal/kg, 4000 Kcal/kg and 4200 Kcal/kg). The serum testosterone level, the sperm mobility (76.67, 62, 63 and 57%) and count per cauda epididymis (18.25±3.75, 16.38±4.19, 10.83±2.02 and 10.13±2.9) and per gram cauda epididymis (39.09±11.82, 27.01±4.23, 15.41±3.31 and 17.40±7.28) significantly (p<0.05) decreased with the increasing level of digestible energy in the feed.Conclusions: The dietary digestible energy level that gave the higher reproductive performances in male African giant rat was 3600 Kcal/kg DM

Assessment of aflatoxin contamination of maize, peanut meal and poultry feed mixtures from different agroecological zones in Cameroon. Toxins 2013

toxin

Toxicity and Reproductive Parameters Impairment of Cypermethrin in Male Guinea Pig (Cavia porcellus)

Cypermethrin is a large spectrum action insecticide, globally employed to control pests in agriculture and some human and domestic animals ectoparasites. This study aimed to evaluate its toxicity and reproduction impairment in male guinea pig. Forty adult male guinea pigs were divided into 4 groups and orally submitted to 0, 92, 137.5 and 275 mg/kg body weight/day for 90 days. The weight of the liver increased significantly, while that of kidneys decreased significantly in treated animals compared to controls. Serum concentrations of creatinine, urea, ALAT, ASAT, total cholesterol, prostatic acid phosphatase increased significantly, while the testicular total protein level decreased significantly in groups given the insecticide relatively to the control. The testes weight, libido, serum level of testosterone, mobility, sperm count and the percentage of spermatozoa with entire plasma membrane decreased significantly in animals exposed to cypermethrin with reference to controls. The percentages of abnormal spermatozoa increased significantly in animals submitted to 137.5 or 275 mg/kg body weight (bw) of cypermethrin compared to control ones. On the testis histological sections of pesticide-treated animals, immature germinal cells were observed in the lumen of seminiferous tubules. Cypermethrin was toxic in male guinea pig and damaged reproductive parameters

Growth performance, microbial and hemato-biochemical profile, and organs histology of broiler chickens fed diets supplemented with a seasoning named Jumbo Cube as source of monosodium glutamate

Objective: this study was conducted in order to assess the effects of dietary Jumbo Cube as source of Monosodium Glutamate (MSG) on production performances of broiler chickens. Materials and methods: 320 day-old Ross 308 broiler chicks were randomly divided into five groups of 64 chicks each. Negative and positive control groups were fed on basal diet with no supplement (R0-) and 1 gm of antibiotic (R0+) respectively and the 3 others groups were fed on diets supplemented with the quantities of Jumbo cube containing 1 mg, 2 mg and 4 mg of MSG/Kg of feed. Feed intake (FI), feed conversion ratio (FCR), weight gain (WG), blood parameters and intestinal microbial counts were evaluated. Results: Results revealed that feeding broilers with Jumbo Cube as MSG source significantly (P [J Adv Vet Anim Res 2018; 5(2.000): 146-154