فهرست مطالب

Poultry Science Journal - Volume:5 Issue: 2, Summer-Autumn 2017

Poultry Science Journal
Volume:5 Issue: 2, Summer-Autumn 2017

  • تاریخ انتشار: 1396/07/29
  • تعداد عناوین: 8
|
  • Keshavarzi S., Houshmand M.*, Bahreini Behzadi Mr Pages 1-8
    The aim of this study was to determine whether the age of broilers can influence their response to tannin-rich diets. A total of 340 one-day-old mixed sex Ross 308 broiler chicks were distributed among five experimental groups with four replicates and 17 birds each in a completely randomized design. A high-tannin feedstuff, Oak acorn, was included into diets (at a level of 25%) and fed to birds at different stages of the rearing period. The control group was fed a corn-based diet (without Oak acorn) for the entirety of the study, while the other four groups were fed diets containing Oak acorn during one of the following periods: starter (d 1 to 21), finisher (d 22 to 42), last five weeks (d 8 to 42), or total period of the experiment (d 1 to 42). We found that performance traits (feed intake, body weight gain and feed conversion ratio) and tibia characteristics were similar among the control group and groups fed Oak acorn during the starter and finisher periods. However, feeding chicks with Oak acorn from 8 to 42 or 1 to 42 d of age significantly reduced overall body weight gain and increased overall feed conversion ratio (P
    Keywords: Age, Tibia, Broiler, Oak acorn, Performance
  • Aziz Sr, Shaker As*, Kirkuki Sms Pages 9-13
    481 fresh fertilized eggs of three Kurdish local chickens (Black with brown neck, White with shank feathering, and White with non-feathering shank) were collected at pre molting (355 eggs) and post-molting (126 eggs) stages to evaluate external egg traits. A venine caliper was used to determine the length and breadth of eggs to calculate Shape index. Results indicated that egg weight increased in all genetic groups (P
    Keywords: Local chicken, Natural molting, Egg external trait
  • Moradi F., Samadi F.*, Dastar B., Samadi S Page 15
    This experiment was conducted to assess the effects of Silymarin on oxidative status, bone characteristics, and some blood parameters in Japanese quail subjected to oxidative stress induced by carbon tetrachloride (CCl4). The experiment was performed as a completely randomized design with four replicates, each with 30 birds, using a 2 × 2 factorial arrangement with two doses of Silymarin (0 and 1 mL/kg BW) and CCl4 (0 and 1 mL/kg BW). Results revealed that the interaction between Silymarin and CCl4 on concentrations of total cholesterol, triglycerides, glucose, albumin, calcium, and alkaline phosphatase were significant (P
    Keywords: Bone index, Japanese quail, Oxidative stress, Blood biochemical parameters
  • Araghi A., Nazaktabar A., Sayrafi R., Salehi A., Golshahi H., Jahanbakhsh M., Seifi S.* Page 23
    This study was designed to evaluate the effects of nanocurcumin (NC) on oxidative stress and histology of embryonic chicken heart. NC was injected into the yolk of 4-day-old embryonic eggs at one of three doses: 10 ppm (NC10 group), 100 ppm (NC100 group), and 1000 ppm (NC1000 group). The control group received normal saline. Oxidative stress in heart tissue was evaluated by measuring malondialdehyde (MDA) concentration, glutathione (GSH) content, and ferric reducing antioxidant power (FRAP). Serum lipids and cardio-histolopathogy were also measured. There were no significant differences in GSH, FRAP, and MDA levels between the control and treatment groups (P > 0.05). The serum lipid profile was altered in the NC100 group, with reduced levels of triglyceride (TG) (P
    Keywords: Nanocurcumin, Oxidative stress, Chicken embryo
  • Kheirkhah Z.*, Hassani S., Zerehdaran S., Ahani Azari M., Sekhavati Mh, Salehinasab M Pages 31-39
    This study was conducted to estimate the genetic parameters influencing egg quality in Khorasan Razavi native fowl. (Co)Variance components were estimated by the Bayesian statistical method via Gibbs sampling in GIBBS3F90 software. 1000 eggs (28-29 weeks old) were collected from 775 hens of the ninth generation of Khorasan-Razavi Province native fowl breeding center. External (egg weight, specific gravity, long length, short length, shape index, shell strength, shell weight, shell thickness) and internal (yolk diameter, yolk height, yolk weight, yolk index, albumen diameter, albumen height, albumen weight, albumen index, Haugh unit) egg quality traits were measured. Six univariate animal models were used for estimation of genetic parameters and the best model for each trait was determined by deviance information criterion (DIC). Genetic and phenotypic correlations between traits were estimated using bivariate animal model. Direct heritability estimates ranged from 0.10 (egg width) to 0.39 (yolk index). For all traits except albumen diameter and albumen index, the inclusion of maternal effects in the model resulted in considerable reduction in direct heritability. Genetic correlations of egg weight with shell strength and shell thickness were negative. In conclusion, due to genetic correlations among external and internal egg quality traits, selection based on egg weight and shell thickness may improve external and internal egg quality traits. Also, including maternal effects in the form of genetic or permanent environment in the statistical model resulted in more accurate estimates for most traits.
    Keywords: Egg, Chicken, Maternal effects, Bayesian method, Genetic parameters
  • Rodrigues Ibbe*, Ferreira Kfs, Silva Rl, Machado Sa, Nascimento Er, Rodrigues Dp, Aquino Mhcmhc, Pereira Vla Pages 41-47
  • Abbasi M., Dastar B., Afzali N., Shams Shargh M., Hashemi Sr Pages 49-61
    This study was conducted to determine the effects of various doses and particle sizes (micro or nano) of dietary zinc and zinc oxide on growth performance, serum enzyme activities, carcass characteristics, and zinc requirements in Japanese quails. A total of 576 day-old Japanese quails (both sexes) were housed in 36 deep litter floor pens. Birds received a basal corn–soybean meal diet that was deficient in zinc (27 mg zinc/kg) for 10 days post-hatching in order to deplete them from zinc reserves. Then, quails were randomly allocated to nine dietary treatments: a control treatment (27 mg of Zn/kg of diet), or one of four levels of Zn (25, 50, 75, and 100 mg/kg of diet) that were one of two ZnO particle sizes (micro or nano ZnO). Birds were fed the experimental diets from 10 to 40 days of age. Body weight and feed intake per pen were measured every 10 days and feed conversion ratio was calculated. On day 40, two males per replicate were slaughtered and carcass characteristics were measured. A quadratic increase in body weight gain (P
    Keywords: Zinc, particle sizes, Requirement, Coturnix coturnix japonica
  • Raeisi-Zeydabad S., Mirmahmoudi R.*, Esmaeilipour O., Mazhari M Pages 63-70
    This experiment was carried out to study the effects of Coenzyme Q10 (CoQ10) and vitamin C (VC) on growth performance and blood biochemistry in broiler chickens under heat stress conditions. One of three levels of CoQ10 (0, 20, and 40 mg/kg of diet) and one of two levels of VC (0 and 250 mg/kg of diet) were supplemented to diets of chicks (from 1-42 d of age) in a 3 × 2 factorial arrangement. Each dietary treatment had four replicate pens (10 chicks/pen). In order to create chronic heat stress, the house temperature was set at an ambient temperature of 35±2°C for 8 hrs daily (09:00 to 17:00) between 25-42 d of age. Feed intake, body weight gain (BWG), and feed to gain ratio (F:G) were recorded at d 10, 25 and 42. At the end of experiment, two chicks/pen were randomly selected to assess blood components. CoQ10 supplementation improved BWG and F:G during 11-25 days, 26-42 days, and the whole period of the experiment (P
    Keywords: Glucose, Heat stress, Triglyceride, Red blood cell, Corticosterone