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British Poultry Science

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https://www.readbyqxmd.com/read/28728428/consequence-of-dopamine-d2-receptor-blockade-on-the-hyperphagic-effect-induced-by-cannabinoid-cb1-and-cb2-receptors-in-layers
#1
M Khodadadi, M Zendehdel, A Baghbanzadeh, V Babapour
1. Endocannabinoids (ECBs) and their receptors play a regulatory function on several physiological processes such as feed intake behaviour, mainly in the brain. This study was carried out in order to investigate the effects of the dopaminergic D1 and D2 receptors on CB1/CB2 ECB receptor induced hyperphagia in 3-h feed-deprived (FD3) neonatal layer chickens. 2. A total of 8 experiments were designed to explore the interplay of these two modulatory systems on feed intake in neonatal chickens. In Experiment 1, chickens were intracerebroventricular (ICV) injected with control solution, L-DOPA (levo-dihydroxyphenylalanine as precursor of dopamine; 125 nmol), 2-AG (2-arachidonoylglycerol as CB1 receptor agonist; 2 µg) and co-adminstration of L-DOPA (125 nmol) plus 2-AG (2 µg)...
July 21, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28418277/geographical-variation-in-the-skeletal-morphology-of-red-jungle-fowl
#2
H Endo, N Tsunekawa, M Sonoe, Tї Sasaki, H Ogawa, T Amano, T S Nguyen, 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...
July 13, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28699767/achieving-sustainable-production-of-poultry-meat-volume-1-safety-quality-and-sustainability
#3
Hervé Remignon
No abstract text is available yet for this article.
July 12, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28692350/the-muscular-dystrophic-chicken-is-hypernatremic
#4
N Saito, H Hirayama, K Yoshimura, Y Atsumi, M Mizutani, K Kinoshita, A Fujiwara, T Namikawa
1. The WWP1 gene, the mutation of which causes muscular dystrophy in chickens, is expressed not only in the pectoral muscle, but also in a number of tissues such as the kidney. Therefore, this study examined some parameters related to kidney function in muscular dystrophic (MD) chickens. 2. Plasma osmolality, Na(+) and K(+) concentrations, aldosterone levels, and the expression of aquaporin (AQP) 2, AQP3, and α subunits of the amiloride-sensitive epithelial sodium channel (αENaC) were analysed in the kidneys of 5-week-old MD chickens and White Leghorn (WL) chickens under physiological conditions or after one day of water deprivation...
July 10, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28682120/comparison-of-the-effects-of-dietary-supplementation-of-flavonoids-on-laying-hen-performance-egg-quality-and-egg-nutrient-profile
#5
H Iskender, G Yenice, E Dokumacioglu, O Kaynar, A Hayırlı, A Kaya
1. The aim of this experiment was to compare the effects of dietary supplementation of hesperidin, naringin and quercetin on laying hen performance, egg quality and egg yolk lipid and protein profiles. A total of 96 Lohmann White laying hens weighing an average of 1500 g at 28 weeks of age were randomly assigned to a basal diet and the basal diet supplemented (0.5 g/kg) with either hesperidin, naringin or quercetin. Each treatment was replicated in 6 cages in an 8-week experimental period. Data were analysed using one-way ANOVA...
July 6, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28682111/performance-gut-morphology-and-microbiology-effects-of-a-bacillus-probiotic-avilamycin-and-their-combination-in-mixed-grain-broiler-diets
#6
A L Wealleans, M Sirukhi, I A Egorov
1. This study aimed to determine the effect of avilamycin (AGP) and a multi-strain Bacillus probiotic (DFM) on the performance, gut histology and microbiology of broilers fed on a mixed grain diet. 2. A total of 800 chicks were allocated to 4 treatments: a control diet, control+AGP, control+DFM, or control+AGP+DFM. Bodyweight, feed intake and FCR were measured at d 0, 21 and 42. Samples were taken at d42 to determine villus height (VH), crypt depth (CD) and ratio (VH:CD). Mucosal E. coli and Lactobacilli counts were measured at d42...
July 6, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28675310/effect-of-crude-protein-concentration-and-dietary-electrolyte-balance-on-litter-quality-foot-pad-dermatitis-growth-performance-and-processing-yields-in-two-medium-heavy-turkey-hybrids
#7
T Veldkamp, P M Hocking, L J Vinco
1. An experiment was conducted to investigate the effect of crude protein (CP) concentration and dietary electrolyte balance (DEB) on growth performance, processing yields, litter quality and foot pad dermatitis (FPD) in male turkeys from two commercial hybrids. Soya bean meal was replaced by vegetable protein sources selected for lower K concentrations to lower DEB in order to improve litter quality and subsequent quality of foot pads. 2. Effects of CP on litter friability and wetness were not consistent during the production period...
July 4, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28656787/quality-assessment-of-chicken-eggshell-cuticle-by-infrared-spectroscopy-and-staining-techniques-a-comparative-study
#8
N Dominguez-Gasca, A Muñoz, A B Rodriguez-Navarro
1. The cuticle is a very thin organic layer that coats the eggshell surface and plugs the eggshell pores preventing bacterial penetration. It also reduces egg shell permeability which is important to maintain egg internal quality. Thus, the eggshell cuticle quality is crucial to ensure the food safety and quality of eggs. 2. A new methodology to assess eggshell cuticle quality, based on attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), with a more traditional method based on cuticle staining techniques...
June 28, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28511556/performance-and-digestive-function-of-broiler-chickens-given-grit-in-the-diet
#9
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...
June 21, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28503928/effect-of-intermittent-feeding-and-oat-hulls-to-improve-phytase-efficacy-and-digestive-function-in-broiler-chickens
#10
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 × 2 × 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 four 1 h feeding bouts...
June 15, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28494164/effects-of-enhancing-vitamin-d-status-by-25-hydroxycholecalciferol-supplementation-alone-or-in-combination-with-calcium-and-phosphorus-on-sternum-mineralisation-and-breast-meat-quality-in-broilers
#11
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 25-hydroxycholecalciferol (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 hatch 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 18...
June 15, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28541756/genetic-diversity-of-mtdna-d-loop-sequences-in-four-native-chinese-chicken-breeds
#12
H W Guo, C Li, X N Wang, Z J Li, G R Sun, G X Li, X J Liu, X T Kang, R L Han
1. To explore the genetic diversity of Chinese indigenous chicken breeds, a 585 bp fragment of the mitochondrial DNA (mtDNA) region was sequenced in 102 birds from the Xichuan black-bone chicken, Yunyang black-bone chicken and Lushi chicken. In addition, 30 mtDNA D-loop sequences of Silkie fowls were downloaded from NCBI. The mtDNA D-loop sequence polymorphism and maternal origin of 4 chicken breeds were analysed in this study. 2. The results showed that a total of 33 mutation sites and 28 haplotypes were detected in the 4 chicken breeds...
June 13, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28398093/increased-iron-level-in-phytase-supplemented-diets-reduces-performance-and-nutrient-utilisation-in-broiler-chickens
#13
Marjina 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 were investigated in a 3 × 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 and 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 × phytase interaction significantly influenced the feed intake (FI), body weight gain (BWG) and feed conversion ratio (FCR)...
June 13, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28398088/effects-of-fermented-cottonseed-meal-on-the-growth-performance-gastrointestinal-microflora-population-and-small-intestinal-morphology-in-broiler-chickens
#14
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 soya bean 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 A. oryzae for 7 d. 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% CSM or FCSM) in a completely randomised design...
June 13, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28604099/seasonal-and-daily-changes-in-the-behaviour-of-the-adult-emu-dromaius-novaehollandiae-under-farm-conditions
#15
M Bucław, D Szczerbińska
1. The aim of this study was to present selected elements of emu behaviour in three different seasons (the non-breeding season, the pre-breeding season and the breeding season) and in the morning and afternoon. The study focused on feed, water and sand intake, plumage care, resting, agonistic behaviour and other activities, mostly standing still, aimless walking or observing the surroundings. 2. The troop consisted of 11 emus (5 females and 6 males) aged 12 years, kept in a free-range system. Observations were carried out during a period of three weeks in each season, during which 60-minute observation sessions took place on 3 randomly chosen days...
June 12, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28604061/evaluating-the-effects-of-bedding-materials-and-elevated-platforms-on-contact-dermatitis-and-plumage-cleanliness-of-commercial-broilers-and-on-litter-condition-in-broiler-houses
#16
E Kaukonen, M Norring, A Valros
1. Experiment 1, comparing wood shavings and ground straw bedding with peat, was performed on 7 broiler farms over two consecutive batches during the winter season. Experiment 2, assessing the effect of elevated (30 cm) platforms, was conducted in three farms replicated with 6 consecutive batches. 2. Footpad lesions were inspected at slaughter following the Welfare Quality® (WQ) assessment and official programme. Hock lesions, plumage cleanliness and litter condition were assessed using the WQ-assessment. Litter height, pH, moisture and ammonia were determined...
June 12, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28548864/oral-administration-of-a-medium-containing-both-d-aspartate-producing-live-bacteria-and-d-aspartate-reduces-rectal-temperature-in-chicks
#17
P H Do, P V Tran, M A Bahry, H Yang, G Han, A Tsuchiya, Y Asami, M Furuse, V S Chowdhury
1. The aim of this study was to investigate the effects on the rectal temperature of young chicks of the oral administration of a medium that contained both live bacteria that produce D-aspartate (D-Asp) and D-Asp. 2. In Experiment 1, chicks were subjected to chronic oral administration of either the medium (containing live bacteria and 2.46 μmol D-Asp) or water from 7 to 14 d of age. Plasma-free amino acids as well as mitochondrial biogenic gene expression in the breast muscle were analysed. In Experiment 2, 7-d-old chicks were subjected to acute oral administration of the above medium or of an equimolar amount of D-Asp to examine their effect on changes in rectal temperature...
June 12, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28547997/effect-of-purine-nucleosides-on-growth-performance-gut-morphology-digestive-enzymes-serum-profile-and-immune-response-in-broiler-chickens
#18
A Daneshmand, Hassan Kermanshahi, M Danesh Mesgaran, A J King, S A Ibrahim
1. This study was conducted to evaluate the effects of purine nucleosides on performance, gut morphology, intestinal enzymes and immunity functions in broiler chickens from 0 to 21 d of age. 2. A total of 360 1-d-old male chickens (Cobb 500) were randomly assigned to 4 treatments with 6 replications. Experimental diets consisted of a control without any additives and diets containing 0.1% pure adenosine, 0.1% pure guanosine and 0.1% equal aliquots of pure adenosine and guanosine. Two birds per cage (12 birds per treatment) were killed on d 11 and 21 in order to obtain serum samples for lipid profile, jejunal samples for morphology and mucosal immunity, digestive enzymes for epithelial maturation, and bursa and spleen samples for relative weight of immune organs to live body weight...
June 12, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28481190/dietary-inclusion-of-arabinoxylo-oligosaccharides-in-response-to-broilers-challenged-with-subclinical-necrotic-enteritis
#19
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 to 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 16 000 BXU (birch xylanase unit) xylanase in vitro or AX fed with 16 000 BXU xylanase (AX + E)...
June 9, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28463011/genetic-evaluation-of-laying-performance-in-the-zatorska-goose-contribution-to-the-conservation-programme
#20
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 Best Linear Unbiased Prediction (BLUP) methodology. Second, the trajectory of the egg production curve was examined. 2. The data contain information about the laying performance of 1831 individuals in the first year of laying. To describe the trajectory of the laying performance, 10 mathematical models were tested...
June 8, 2017: British Poultry Science
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