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British Poultry Science

Elmutaz Awad, Zulkifli Idrus, Abdoreza Soleimani Farjam, Alhassan O Bello, M Faseleh-Jahromi
1. This study was undertaken to examine the effect of feeding glycine (Gly)-fortified low protein diets on the growth performance, duodenal morphology and caecal microbial populations of broiler chickens raised under unheated, cyclic or constant heat stress environmental conditions. 2. From d 1 - 21 (starter phase), an equivalent number of birds were fed either a normal protein (NP) diet or a low protein (LP) diet fortified with Gly. From d 22 - 42 (grower phase), an equivalent number of birds from each starter diet were distributed to one of the following dietary groups: (1) a normal protein diet during the starter and grower phases (NPNP), (2) a normal protein diet during the starter phase and a low protein diet during the grower phase (NPLP), (3) a low protein diet during the starter phase and a normal protein diet during the grower phase (LPNP) or (4) low protein diets during both phases (LPLP)...
February 13, 2018: British Poultry Science
B Koçer, M Bozkurt, G Ege, A E Tüzün, R Konak, O Olgun
1. The aim of this study was to identify a feeding regimen that encourages good pasture use in slow (SG) and fast (FG) growing broiler genotypes under free-range management. 2. SG and FG birds fed on either an ad libitum (ADB) or a meal feeding (MEF) programme was given free outdoor access with or without fresh alfalfa from d 22 to 72 and from d 22 to 45, respectively. In two consecutive trials, 800 birds of each genotype were included in a factorial design using groups of 40 birds replicated 5 times. 3. Fresh alfalfa consumption did not improve growth performance and meat quality attributes, whereas the feeding regimen had significant implications...
February 12, 2018: British Poultry Science
S A Lee, J Dunne, E Febery, P Wilcock, T Mottram, M R Bedford
1. The current study was conducted to investigate the effect of high phytase doses on growth performance and real-time gastric pH measurements in broiler chickens and pigs. 2. In the first experiment, 576 male Ross 308 broilers were fed in two phases (0-21 and 21-42 d) with 4 treatment groups, with diets meeting nutrient requirements containing 0, 500, 1500 or 2500 FTU/kg phytase. In the second, 64 Landrace weaners were fed on diets meeting nutrient requirements with or without phytase (0 or 2500 FTU/kg) in two phases (0-21 and 21-42 d)...
February 12, 2018: British Poultry Science
V Cardoso, E A Fernandes, H M M Santos, B Maçãs, M M Lordelo, Luis Telo da Gama, L M A Ferreira, C M G A Fontes, T Ribeiro
1. Endo-1,4-β-xylanase is known to improve the nutritive value of wheat-based diets for poultry by degrading dietary arabinoxylans. However, broilers response to supplementation of wheat-based diets with exogenous endo-1,4-β-xylanase is not always observed. 2. In this study, 108 different wheat lots were analysed for levels of extract viscosity as well as for endogenous endo-1,4-β-xylanase activity and the impact of these two variables in animal performance was tested. 3. Results revealed that endogenous endo-1,4-β-xylanase activity and extract viscosity content varied widely among different wheat lots...
February 9, 2018: British Poultry Science
D Zapletal, M Macháček, P Suchý, E Straková, F Vitula
1. The aim of this study was to investigate if male-to-female aggression of common pheasants in the course of the breeding season was related to the concentration of plasma testosterone and/or of other biochemical plasma indicators of male pheasants housed in breeding cages. The influence of season on the concentration of testosterone and biochemical indicators was also investigated. 2. Males were divided into a non-aggressive and an aggressive group during the breeding season based on ethological evaluation...
February 2, 2018: British Poultry Science
G S Archer
1. The objective of this study was to evaluate the effect of two different spectra of white light on hatchability and chick quality of broiler chickens. 2. A total of 8424 Ross 708 broiler eggs were divided over three light exposure treatments during incubation: No light (DARK), a LED light with high levels of blue light (BLUE), or a LED light with high levels of red light (RED). Hatchability, embryo mortality, and chick quality were assessed at hatch. 3. DARK had a higher percentage of chicks with unhealed navels (21...
February 2, 2018: British Poultry Science
H Remignon
No abstract text is available yet for this article.
January 29, 2018: British Poultry Science
R Akbari Moghaddam Kakhki, Z Mousavi, K E Anderson
1. The aim of this study was to establish how different moulting methods and body weight losses influenced post-moult performance and USDA egg weight distribution. 2. Data of 5 laying flocks (#34-38) of the North Carolina Layer Performance and Management Test were used in this meta-analysis. 3. The moulting methods were non-fasted moulted (NF), short feed restricted (SF), 13-d feed restricted (FR), non-anorexic moult programme (NA), non-anorexic moult programme with low sodium (NALS) as well as non-moulting programme as control treatment...
January 29, 2018: British Poultry Science
H L Lin, R B Liaw, Y H Chen, T C Kang, D Y Lin, L R Chen, M C Wu
1. The results of spermatozoa assessment by the WST-8 (2-[2-methoxy-4-nitrophenyl]-3-[4-nitrophenyl]-5-[2,4-disulfophenyl]-2H-tetrazolium, monosodium salt) assay, flow cytometry (FC) or computer-assisted spermatozoa analysis (CASA) were compared. 2. Different live/killed ratios of cockerel semen were serially diluted to 120, 60, and 30 × 106 cells/ml, and each sample was analysed by (1) WST-8 assay at 0, 10, 20, 30, 40, 50, 60 min, (2) viability with flow cytometry, and (3) motility with CASA. 3. The WST-8 reduction rate was closely correlated with spermatozoa viability and motility...
January 22, 2018: British Poultry Science
S Yalcin, K Şahin, M Tuzcu, G Bilgen, S Özkan, G T İzzetoğlu, R Işik
1. The objective of this study was to determine muscle structure and gene expression in pectoralis major (p. major) muscle of broilers in response to deep pectoral myopathy (DPM) induction. 2. A total of 160 chickens from slow- and fast-growing broilers were raised under same conditions. Half of the broilers from each strain were encouraged to wing flap when they reached to 2800 g body weight. Pectoralis minor (p. minor) muscle of the broilers was inspected for the occurrence of DPM and p. major samples were collected from broilers with or without DPM...
January 22, 2018: British Poultry Science
A Marek, E Pyzik, D Stępień-Pyśniak, R Urban-Chmiel, A Nowaczek
1. The objective of this study was the isolation and morphological characterisation of temperate bacteriophages induced from Staphylococcus aureus strains isolated from clinical samples from broiler chickens and turkeys. 2. Eighty-five S. aureus strains were tested for susceptibility to oxacillin in order to determine which were multi-resistant. A total of 24 strains showed resistance to methicillin. 3. Thirty-one bacteriophages that were lytic against S. aureus strains were isolated and the host range of the bacteriophages was evaluated...
January 11, 2018: British Poultry Science
P M Hocking, L J Vinco, T Veldkamp
1. A 2 x 2 factorial experiment was conducted to compare the effects of wheat or maize based diets differing in dietary electrolyte balance (DEB) on litter moisture and foot pad dermatitis (FPD) at 4, 8 and 12 weeks of age in heavy-medium turkeys. A second objective was to investigate the interaction effects between dietary composition and artificially increasing litter moisture by adding water to the litter on foot pad dermatitis. 2. High DEB diets contained soya as the main protein source whereas low DEB diets did not contain soya bean meal...
January 8, 2018: British Poultry Science
O Olgun, Y Altay, Alp O Yildiz
1. This study was conducted to determine the effects of enzyme supplementation of maize/wheat-based diets on the performance, egg quality, and serum and bone parameters of laying hens. 2. During the 12-week experimental period, a total of 72 laying hens aged 52 weeks were randomly distributed among 6 experimental groups. Each experimental group contained 4 replicates, each with three birds. The experiment was a randomised design consisting of a 3×2 factorial arrangement, with three levels of wheat substitution and two levels of enzyme (xylanase: 1500...
January 5, 2018: British Poultry Science
G A Papadopoulos, T Poutahidis, S Chalvatzi, M Dibenedetto, A Hardas, V Tsiouris, I Georgopoulou, G Arsenos, P D Fortomaris
1. The study aimed to investigate the effect of lysolecithin supplementation in low energy diets on growth, nutrient digestibility and intestinal mucosa characteristics of broilers. 2. A total of 800 one-d-old Ross 308 broiler chickens were assigned to 4 dietary treatments consisting of 10 replicates of 20 broilers each. Broilers were fed with 4 different diets: (i) HE: positive control group broilers received a diet with unaltered energy; (ii) LE: negative control group broilers received a diet with lower energy of about 0...
January 2, 2018: British Poultry Science
X Zou, J Ji, J Wang, H Qu, D M Shu, F Y Guo, C L Luo
1. The clinical severity, histological changes, indicators of gut leakiness and inflammatory cytokine profiles were studied in chickens with dextran sulphate sodium (DSS)-induced intestinal inflammation. 2. The experimental groups (1.25, 1.5 and 2.5% DSS) showed clinical signs, such as loose stools and weight loss, which increased with additional treatment days and, as expected, the effects of DSS-induced intestinal inflammation were time and dose dependent. 3. After 10 d, histological manifestations were evident, including goblet cell depletion, mucus layer loss, significantly shorter villi and a thinner total ileal mucosa...
December 21, 2017: British Poultry Science
A Attar, H Kermanshahi, A Golian
1. This study was carried out to evaluate the effect of steam-conditioning time and different levels of processed sodium bentonite (PSB) on pellet quality, growth performance, intestinal development and morphology, and nutrient digestibilities in broilers during finisher period (d 24-45). 2. A total of 810 male chicks were reared in commercial conditions on floor pens till d 24. Then, birds were weighed and used in a completely randomised design experiment with a 3 × 3 factorial arrangement, including three levels of conditioning times (0, 2 and 4 min) and three PSB levels (0, 7...
December 20, 2017: British Poultry Science
K Utnik-Banaś, J Żmija, J Krawczyk, K Połtowicz
1. The effects of changes in technical efficiency on the increase of broiler production are presented for the period 1994 - 2013 based on the panel data from 7 farms located in southern and central Poland. A total of 766 cycles were analysed. 2. The Cobb-Douglas production function was used to assess the changes of output elasticities as well as technical changes in broiler production, for five-year sub-periods separately. 3. Technical indices of broiler production significantly improved between years 1994-2013: feed conversion ratio decreased from 2...
December 13, 2017: British Poultry Science
M Batoryna, M W Lis, G Formicki
1. Acrylamide (ACR) is a potent neurotoxicant, although information on its toxic influence on the developing neural system is still limited. We examined the effect of in-ovo-injected ACR on the antioxidant system activity in the brain of new hatched chickens. This model eliminated the mother's contribution to embryonic development. It was also recognised as an adequate model for animal embryonic development. 2. ACR was injected on day 4 of embryogenesis- in doses of 1.25 and 2.50 mg per egg (n=40 eggs per group/120 eggs)...
December 12, 2017: British Poultry Science
J Huang, L Huang, Q Zeng, E Huang, H Liang, Q Wei, X Xie, J Ruan
1. Differences in the expression of CIDEa and CIDEc in 20 different tissues were examined. Both CIDEa and CIDEc mRNA transcripts were predominantly but variably expressed in white adipose tissue (WAT) but were also expressed at moderate levels in the kidney and liver and at lower levels in the ovary. Interestingly, among white adipose tissue types, both CIDEa and CIDEc were expressed at the lowest levels in hWAT (heart coronary white adipose tissue). 2. To better understand the roles of CIDEa and CIDEc in the fat deposition of broiler chickens, the differences in lipid droplet size and mRNA levels of CIDEa and CIDEc between lean-type and fat-type broiler chicken lines was studied...
December 8, 2017: British Poultry Science
M F A Farghly, M Alagawany, M E Abd El-Hack
1. A total of 180 one-day-old chickens were randomly assigned to 6 equal groups to investigate the effect of feeding time on growth performance, carcass characteristics, meat quality, leg problems and physiological responses of growing turkeys under the high temperature conditions of summer. 2. Birds of the first group were ad libitum fed and were considered as the controls (C). The second group (T1) was given 80% of diet in the morning and 20% of diet in the afternoon, The third group (T2) was given 60% of diet in the morning and 40% of diet in the afternoon, The fourth group (T3) was given 40% of diet in the morning and 60% of diet in the afternoon, The fifth group (T4) was given 20% of diet in the morning and 80% of diet in the afternoon and the sixth group (T5) was given 100% of diet in the afternoon...
December 7, 2017: British Poultry Science
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