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British Poultry Science

M M Fathi, T A Ebeid, I Al-Homidan, N K Soliman, O K Abou-Emera
1. The objective of the study was to evaluate the potential effects of dietary probiotic supplementation and stocking density and their interaction on growth performance, humoral and cellular immune responses of broiler chickens raised under hot climate conditions. 2. A total of 1800 1-d-old unsexed broiler chicks (Ross 308) were allocated in a completely randomised 3 × 2 factorial design, with three concentrations of dietary probiotic (0, 200 and 400 mg/kg) containing 4×10(9) cfu/g of Bacillus subtilis and two stocking densities (12 or 18 birds/m(2)) in a total of 6 treatment sub-groups...
May 18, 2017: British Poultry Science
B Svihus, K Itani, K Borg, E C Larsson, R Ao, A Sudubilige, B Fuerjiafu, H Liu, H Hetland, G Sanson, B Kierończyk, M Rawski, D Józefiak
1. A series of experiments were carried out to study the effect of grit on broiler performance, gizzard development and fate of grit in the digestive tract. 2. In Experiment 1, performance, gizzard weight and content of grit in the gizzard of broiler chickens given access to granite-type grit was investigated. In Experiment 2, the effect of grit stones on performance and gizzard development was assessed in diets with or without whole wheat. 3. In Experiment 3, the effect of grit in the form of zeolite, granite or marble on gizzard development and digestive tract grinding and passage was studied in diets with or without whole wheat...
May 17, 2017: British Poultry Science
A Sacranie, X Adiya, L T Mydland, B Svihus
1. Two trials were carried out to investigate the impact of intermittent feeding and oat hulls as methods to stimulate the anterior digestive tract in broiler chickens. 2. In Trial 1, 7 d old broilers were placed 4 per cage in 48 cages and fed either ad libitum or intermittently on a diet with 50 g/kg of either oat hulls or cellulose with or without 1000 FTU phytase, in a 2 x 2 x 2 factorial arrangement. Ad libitum fed birds had two 4-h dark periods with 1 h light in-between, while intermittently fed birds in addition had restricted access to feed through 4 1-h feeding bouts...
May 15, 2017: British Poultry Science
R Mañes-Lázaro, P M Van Diemen, C Pin, M J Mayer, M P Stevens, A Narbad
1. Campylobacter jejuni is the most common bacterial cause of human food-borne gastroenteritis in the world. A major source of human infection is the consumption of contaminated meat, particularly poultry. New control measures to reduce or eliminate this pathogen from the animal gastrointestinal tract are urgently required, and the use of probiotics as competitive exclusion agents is a promising biocontrol measure to reduce C. jejuni in the food chain. 2. In this study, we assessed the potential of Lactobacillus johnsonii FI9785, which has shown efficacy against Clostridium perfringens, to combat C...
May 12, 2017: British Poultry Science
L Masouri, S Salari, M Sari, S Tabatabaei, B Masouri
1. The aim of this study was to evaluate various levels of Satureja Khuzistanica essential oil (SKEO) on performance and physiological parameters of broilers fed on wheat- or maize-based diets. 2. Treatments consisted of two cereals (maize or wheat-based diets) and 3 levels of SKEO)0, 250 and 500 mg/kg). 3. Feed intake (FI) and body weight gain (BWG) decreased in broilers fed on the wheat-based diets compared to the control diet. Dietary supplementation of 500 mg/kg SKEO increased FI and BWG. Dietary SKEO supplementation was effective in improving FI and BWG only in wheat-based diets and was effective in improving FCR in both diets...
May 11, 2017: British Poultry Science
M Bozkurt, S Yalçin, B Koçer, A E Tüzün, H Akşit, S Özkan, M Uygun, G Ege, G Güven, O Yildiz
1. The aim of the present study was to examine the effects of improving vitamin D status in broiler diets by supplementary 25OHD3, alone or in combination with calcium (Ca) and available phosphorus (aP), on live performance, sternum mineralisation and breast meat quality in broilers. 2. A total of 936 1-d-old Ross 308 broilers were used in the study. After gender determination at the hatchery, chicks from each sex were randomly distributed into three dietary treatments. The following dietary treatments were used in the experiment from d old to 38 d: 1) A control diet formulated to meet all of the nutrient requirements of broiler chicks according to the management guide; 2) The control diet supplemented with 15% 25OHD3 and 3) The control diet supplemented with 15% 25OHD3 plus Ca+aP...
May 11, 2017: British Poultry Science
N Baradaran, M H Shahir, Z Asadi Kermani
1. An experiment was performed to elucidate the subsequent effects of high non-phytate phosphorus (NPP) diets on growth performance, blood metabolites, bone characteristics and P retention of broilers fed on low-NPP grower diets. The 42-d study was designed as a 2 × 2 × 2 + 1 factorial, which included 2 starter NPP concentrations (4.5 and 5.5 g/kg; d 0 to 21), 2 grower NPP concentrations (1.5 and 2.3 g/kg; d 22 to 42), with or without phytase (1000 FTU/kg), with a reference diet containing an adequate NPP concentration over the course of the trial...
May 9, 2017: British Poultry Science
C Keerqin, N K Morgan, S B Wu, R A Swick, M Choct
1. This study investigated the prebiotic properties of arabinoxylo-oligosaccharides (AXOS) produced both in situ and in vitro for their activity against the onset of necrotic enteritis in broiler chickens. 2. A 2 × 3 factorial arrangement was applied, including necrotic enteritis challenge (challenged/unchallenged) and three dietary treatments from d 10-21. A wheat-soy commercial type basal grower diet was fed with 2% of the wheat proportion replaced by the same amount of either arabinoxylan (AX), AXOS produced from hydrolysing AX with 16000 BXU xylanase in vitro, or AX fed with 16000 BXU xylanase (AX + E)...
May 8, 2017: British Poultry Science
M Graczyk, H Reyer, K Wimmers, T Szwaczkowski
1. The objective of this study was to indicate the most informative chromosomal regions and candidate genes connected to body weight at 36 d, body weight at 39 d, body weight changes between 39-46 d, feed intake between 39-46 d and feed conversion ratio of meat-type chicken based on genomic data using entropy analysis. 2. Data contained information about 862 genotyped individuals from a Cobb commercial line using 60K Illumina iSelect chicken array and information from 42 770 SNPs. Entropy analysis was employed to detect important chromosomal regions determining the target traits...
May 4, 2017: British Poultry Science
M Graczyk, K Andres, E Kapkowska, T Szwaczkowski
1. The aim of the study was to estimate the heritability of the laying performance in the cumulative and partial production of eggs and predict the breeding values of native Zatorska geese in a conservation programme using BLUP methodology. Secondly, the trajectory of the egg production curve was examined in the context of conservation and the reproduction ability of the endangered-maintained flock of Zatorska goose. 2. The data contain information about the laying performance of 1831 individuals in the first year of laying, hatched between 1990-2014...
May 2, 2017: British Poultry Science
H Endo, N Tsunekawa, M Sonoe, T Sasaki, H Ogawa, T Amano, N T Son, V Phimphachanhvongsod, K Kudo, T Yonezawa, F Akishinonomiya
1. The skulls and postcranial skeletons of the red jungle fowl (Gallus gallus) were compared osteometrically between the populations from North and South Vietnam, North and Central Laos and Southeast Bangladesh. The populations include the three subspecies of G. g. spadiceus, G. g. gallus and G. g. murghi and were sampled to reveal the geographical morphological variations among populations in G. gallus. 2. The morphometric characteristics of subspecies murghi could be clearly distinguished from those of the other subspecies using a canonical discriminant analysis...
April 18, 2017: British Poultry Science
M Akter, P A Iji, H Graham
1. The effect of different levels of dietary iron on phytase activity and its subsequent effect on broiler performance was investigated in a 3 x 2 factorial arrangement. A total of 360 day-old Ross 308 male broiler chicks were distributed to 6 experimental diets, formulated with three levels of Fe (60, 80 and 100 mg/kg) and two levels of phytase (0, 500 FTU/kg). 2. Phytase supplemented to mid-Fe diets increased feed consumption more than the non-supplemented diet at d 24. From hatch to d 35, Fe x phytase interaction significantly influenced the FI, BWG and FCR...
April 11, 2017: British Poultry Science
V Jazi, F Boldaji, B Dastar, S R Hashemi, A Ashayerizadeh
1. This experiment was conducted to evaluate the effects of replacing dietary cottonseed meal (CSM) or fermented cottonseed meal (FCSM) for soybean meal (SBM) on growth performance, carcass characteristics, gastrointestinal microbial populations, and intestinal morphology of broiler chickens. 2. CSM was fermented with Bacillus subtilis, Aspergillus niger and Aspergillus oryzae for 7 days. A total of 300 one-d-old male Ross 308 broiler chickens were used in a 42-d experiment in which the birds were randomly allotted to one of 5 dietary treatments (containing 0, 10 and 20 percent CSM or FCSM) in a completely randomised design...
April 11, 2017: British Poultry Science
M T Musundire, T E Halimani, M Chimonyo
1. The effects of age and sex on body weight, carcass traits, physical and chemical properties of breast muscle from chickens and helmeted guinea fowls managed under village free range conditions, were assessed in random sample of 48 guinea fowls and 48 chickens obtained from local markets. 2. Guinea fowls had higher body weight, hot carcass weight, cold dressed weight and breast weight than chickens. 3. Guinea fowls had more dry matter, protein and less fat than chickens. Ash content did not differ between guinea fowls and chickens...
April 10, 2017: British Poultry Science
M Zendehdel, F Sardari, S Hassanpour, M Rahnema, A Adeli, E Ghashghayi
1. Serotoninergic and adrenergic systems play crucial roles in feed intake regulation in avians but there is no report on possible interactions among them. So, in this study, 5 experiments were designed to evaluate the interaction of central serotonergic and adrenergic systems on food intake regulation in 3 h food deprived (FD3) neonatal layer-type chickens. 2. In Experiment 1, chickens received intracerebroventricular (ICV) injection of control solution, serotonin (56.74 nmol), prazosin (α1 receptor antagonist, 10 nmol) and co-injection of serotonin plus prazosin...
March 31, 2017: British Poultry Science
Y Song, Y Li, S Zheng, W Dai, X Shen, Y Zhang, W Zhao, G Chang, Q Xu, G Chen
1. Highly palatable and nutritious meat products can be produced through dietary interventions. Previous studies have shown that forage feeding has a significant impact on the growth performance and nutrition of cattle in various regions, but whether the same effects can be induced in geese remains unclear. 2. A total of 360 Yangzhou goslings were divided according to body weight at 29 d old, assigned to one of 4 treatments and raised in separate pens (30 geese per pen, 3 replicates per treatment). The treatments applied were A) grazing, no grain supplemental diet, B) grazing, late grain supplemental diet (64 to 70 d), C) grazing, grain supplemental diet and D) confined, grain supplemental diet...
March 29, 2017: British Poultry Science
Z Abidin, A Khatoon, N Arooj, S Hussain, S Ali, A W Manzoor, M K Saleemi
1. The present study was designed to analyse ochratoxin A (OTA) in poultry feed samples (mixed types) along with different poultry feed ingredients collected from different farms and market of Lahore, Pakistan. 2. The whole year (2012-2013) was divided into three sub-periods depending upon environmental conditions, that is, July-October (hot and humid), November-February (winter) and March-June (moderate). During each sub-period 120 samples were collected for each feed and each ingredient constituting a total of 840 samples (120x7 of feed and feed ingredients in each sub-period)...
March 23, 2017: British Poultry Science
J M Carmona, C J Lopez-Bote, A Daza, A I Rey
1. This work aims to quantify changes in fatty acid profile, melting point, abdominal fat accumulation and 2-thiobarbituric acid-reactive substances production depending on dietary fat source and age at slaughter, and to estimate the optimal date for the change from an unsaturated fat to a saturated fat diet or vice versa. 2. Treatments established were (1) birds fed 8% tallow from 21 to 49 d (TTT); (2) birds fed 8% tallow from 21 to 37 d and 8% sunflower oil from d 38 to 49 (TSS); (3) birds fed 8% sunflower oil from 21 to 37 d and 8% tallow from d 38 to 49 (STT); (4) birds fed 8% sunflower oil from 21 to 41 d and 8% tallow from d 42 to 49 (SST); (5) birds fed 8% sunflower oil from 21 to 49 d (SSS)...
March 23, 2017: British Poultry Science
M F Giersberg, N Kemper, J Hartung, L Schrader, B Spindler
1. Specific legal requirements for keeping pullets are not available in the European Union. However, two of the most important rearing factors for pullets are sufficient perching and feeder space. Both factors represent horizontal space dimensions which derive from the body width of the birds. 2. The body width of two strains of layer pullets (brown (BL) and white (WL) layer pullets) based on the measurement of distances in digital images was conducted on front-view digital photographs of BL and WL pullets taken at 8, 12 and 19 weeks of life...
March 20, 2017: British Poultry Science
T J Rieger, C T de Oliveira, J Q Pereira, A Brandelli, D J Daroit
1. Feathers are recalcitrant protein-rich wastes produced in huge amounts by poultry processing for meat production. Hence, feather bioconversion and protease production by Bacillus sp. CL18 were investigated. 2. Bacillus sp. CL18 demonstrated a remarkable feather-degrading potential. Through cultivations on feather broth (10 g l(-1) feathers), 94.5% ± 3% of whole feathers were degraded after 4 d. Increases in soluble protein contents were observed and protease production was maximal also at d 4. This strain produced diverse proteolytic enzymes during growth...
March 17, 2017: British Poultry Science
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