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British Poultry Science

W Chumngoen, C F Chen, H Y Chen, F J Tan
1. This study aimed to evaluate the changes in physicochemical, textural and sensory characteristics of broiler (BR) and Taiwan native (TNC) chicken pectoralis muscle heated at temperatures of 50-95°C. 2. With increasing temperature, cooking loss, collagen solubility, shear force value and hardness of samples increased in both chicken breeds. Rapid decreases in protein solubility were observed when the meat was heated to 50°C and gradually decreased thereafter. 3. Meat from broilers and native chickens performed differently upon heating in certain characteristics...
October 17, 2016: British Poultry Science
R Hüyük, G Eraslan
1. The aim of the study was to examine single dose toxicokinetics of deltamethrin, a broad spectrum pyrethroid insecticide, for treatment of broiler chickens. 2. Twenty male broiler chickens were used. Animals were divided into two groups, each comprising 10 animals. An intravenous dose of 0.75 mg of deltamethrin /kg body weight was given intravenously to the first group and the same dose was administered by intracrop by gavage to the second group. Blood samples were also collected at specified intervals. 3...
October 13, 2016: British Poultry Science
M Hess
1. Infectious diseases have a large impact on poultry health and economics. Elucidating the pathogenesis of a certain disease is crucial to implement control strategies. 2. Multiplication of a pathogen and its characterisation in vitro are basic requirements to perform experimental studies. However, passaging of the pathogen in vitro can influence the pathogenicity, a process targeted for live vaccine development, but limits the reproduction of clinical signs. 3. Numerous factors can influence the outcome of experimental infections with some importance on the pathogen, application route and host as outlined as examples for Histomonas meleagridis, Gallibacterium anatis and fowl aviadenoviruses (FAdVs)...
October 11, 2016: British Poultry Science
P Satheesh, T K Bhattacharya, P Kumar, R N Chatterjee, S K Dhara, C Paswan, R Shukla, K Dushyanth
Activin receptor type 2A (ACVR2A) acts as receptor for myostatin (MSTN) protein involved in inhibiting satellite cell proliferation and differentiation. The importance of the ACVR2A gene during embryonic and post-hatch periods in broiler and layer chicken was studied in an in vitro cell culture system. The expression pattern of the ACVR2A gene during embryonic stages was similar in broiler and layer lines. Post-hatch expression of the ACVR2A gene varied significantly between broiler and layer lines. Five shRNA molecules were designed to knockdown expression of the ACVR2A gene in chicken myoblast cells...
October 11, 2016: British Poultry Science
Z Yang, Z Y Wang, H M Yang, F Z Zhao, L L Kong
1. An experiment with a 2 × 3 factorial design with two concentrations of dietary betaine (0 and 600 mg/kg) and three dietary concentrations of methionine (0, 600 and 1200 mg/kg) was conducted using goslings to estimate growth, nutrient utilisation and digestibility of amino acids from 21 to 70 d of age. 2. Three hundred geese were randomised at 18 d of age into 6 groups with 5 replicates per treatment and 10 geese per replicate. 3. Increasing dietary concentrations of methionine gave a linear increase in body weight and average daily gain...
October 7, 2016: British Poultry Science
S Minieri, A Buccioni, A Serra, I Galigani, A Pezzati, S Rapaccini, M Antongiovanni
The trial was performed with 80 laying hens belonging to two Tuscan autochthonous breeds: 40 birds of the Mugellese breed (MU) and 40 of the White Leghorn breed (WL). The animals were allotted to 4 groups of 20 hens each: two groups were fed on a commercial diet and worked as the control groups (MUC and WLC); the other two groups received the same diet, integrated with 2 g of chestnut tannin extract per kg of diet (MUT and WLT). A sample of 70 eggs were randomly collected and analysed for cholesterol content, fatty acid profile, weight, thickness of shell and colour of yolk...
September 16, 2016: British Poultry Science
X Y Zhang, M Y Zhou, L L Li, Y J Jiang, X T Zou
1. The primary objective of this experiment was to estimate the toxic effects of arsenic (As) supplementation in feed on laying performance, As retention of eggs and organs, serum biochemical indices and endocrine hormones in laying hens. 2. A total of 320 "Jinghong Number 1" hens, 56-week-old, were randomly allocated into four treatments of four replicates with 20 layers. Graded arsenical was added to the basal diet at As levels of 0, 17, 34 and 51 mg/kg, respectively, in the experimental diets. The trial lasted for 9 weeks including a 1 week for acclimatization...
September 16, 2016: British Poultry Science
X-C Hu, C-Q Gao, X-H Wang, H-C Yan, Z-S Chen, X-Q Wang
1. The experiment was conducted to study whether IRS1/Akt/TOR signalling pathway activation stimulates crop milk protein synthesis in the domestic pigeon (Columba livia). 2. Crop milk was collected from 10 1-d-old squabs and analysed for nutrient content. During the non-breeding period and the first day of the lactation, blood samples were collected from 5 pairs of breeding pigeons and the levels of prolactin and insulin were determined. 3. Crop samples were collected from 5 pairs of breeders at days 14 and 16 of the incubation period and days 1, 3 and 7 of the lactation period...
September 16, 2016: British Poultry Science
A Manterys, I Czyzynska-Cichon, A Drahun, E Maslak, M Franczyk-Zarow, B Szymczyk, R B Kostogrys
1. The objective of the present study was to determine effect of pomegranate seed oil (PSO) and linseed oil (LO), on haematological parameters, serum lipid profile and liver enzymes as well as fatty acids profile of adipose tissue in broilers. 2. Broilers (n = 400) were fed on diets containing graded PSO levels (0.0; 0.5; 1.0; 1.5%) with or without 2% LO. After 6 weeks of feeding, 6 male broilers from each group were slaughtered and abdominal fat, liver and blood samples were collected. 3. Mixtures of pomegranate seed oil (0...
September 16, 2016: British Poultry Science
R M Delles, A D True, T Ao, K A Dawson, Y L Xiong
1. The influence of dietary antioxidants and quality of oil on the oxidative and physicochemical properties of chicken broiler breast and thigh meat stored was studied in either an oxygen-enriched (HiOx: 80% O2/20% CO2) or an air-permeable polyvinylchloride (PVC) packaging system during retail display at 2-4 °C for up to 14 and 7 d, respectively. 2. Broilers were fed on a diet with either a low-oxidised (peroxide value 23 meq O2/kg) or high-oxidised (peroxide value 121 meq O2/kg) oil, supplemented with or without an algae/selenium-based antioxidant with organic minerals, for 42 d...
September 16, 2016: British Poultry Science
P Bikker, J W Spek, R A Van Emous, M M Van Krimpen
1. The aim of this study, comprising two experiments, was 1) to determine in Experiment 1 the relationship of incremental dietary P content on precaecal digestible P in male broilers and 2) to determine in Experiment 2 the precaecal P digestibility of various inorganic P sources at marginal levels of P supply. 2. In Experiment 1, a total of 260 male Ross 308 broilers were divided into groups of 10 birds per pen resulting in 8 replicates for treatment 1 and 6 replicates for treatment 2 to 4. Experimental diets were formulated to contain 4 incremental concentrations of digestible P by means of increasing concentrations of monocalcium phosphate (MCP)...
September 16, 2016: British Poultry Science
A M Fouad, D Ruan, Y C Lin, C T Zheng, H X Zhang, W Chen, S Wang, W G Xia, Y Li
1. In this study, 6 dietary DL-methionine (Met) levels (2.5, 3.0, 3.5, 4.0, 4.5 and 5.0 g/kg) were tested to estimate the dietary Met requirements of Longyan ducks from 19 to 46 weeks of age, and to investigate its effect on the glutathione redox system. 2. In total, 1080 Longyan ducks aged 19 weeks were allocated randomly to the 6 dietary treatments, where each treatment comprised 6 replicate pens with 30 ducks per pen. 3. Met had no effects on egg production, yolk weight, yolk colour or the glutathione redox system, but the egg weight, egg mass and feed conversion ratio (FCR) were improved significantly by dietary Met supplementation...
August 10, 2016: British Poultry Science
G do Valle Polycarpo, M F de Castro Burbarelli, Á C de Pinho Carão, C E B Merseguel, J C Dadalt, S R de Lucca Maganha, R L M de Sousa, V C Cruz-Polycarpo, R de Albuquerque
1. Three experiments with a 2 × 2 × 2 factorial arrangement were conducted to evaluate maize-based diets for broilers containing different lipid sources [soybean oil (S) or beef tallow (T)] supplemented with or without lysophospholipids and organic acids on nutrient balance (Experiment I, evaluation period of 10 to 14 d), on liver concentration of fat-soluble vitamins, on jejunal microbiota (Experiment II, sampling at d 14) and on performance (Experiment III, accumulated periods of 1 to 14, 1 to 21 and 1 to 42 d)...
August 5, 2016: British Poultry Science
Y Liu, Y Zhang, H Guo, W Wu, P Dong, X Liang
Nucleic acids have become an important nutritional supplement in poultry feed; however, the digestion of nucleic acids in poultry is unclear. The objective of this study was to investigate the digestion of nucleic acids by chicken pepsin in vitro. The extracted pepsinogen from the stomach of the chicken was purified to homogeneity. Upon activation at pH 2.0, chicken pepsinogen was converted to its active form. Nucleic acids, including λ-DNA, salmon sperm DNA and single-strand DNA (ssDNA), can be used as substrates and digested into short-chain oligonucleotides by pepsin...
October 2016: British Poultry Science
J Rajani, B Dastar, F Samadi, M A Karimi Torshizi, A Abdulkhani, S Esfandyarpour
An in vitro and in vivo study was conducted to evaluate the fermentability of isolated galactoglucomannan oligosaccharides (GGMs) and the influence of their feeding on shedding and colonisation of Salmonella typhimurium, growth performance and intestinal morphology in broiler chicks. The in vitro data demonstrated that three probiotic lactic acid bacteria namely Lactobacillus casei, L. plantarum and Enterococcus faecium were able to ferment the extracted oligosaccharides and other tested sugars on a basal de Man Rogosa Sharpe media free from carbohydrate...
October 2016: British Poultry Science
Y Zhang, F Guo, R Zhao
The fat mass and obesity associated (FTO) gene, which encodes a demethylase of m(6)A, has been reported to respond to lipopolysaccharide (LPS) and to serve as a link between inflammation and metabolic responses. The objective of this study was to determine whether LPS-induced changes in the expression of FTO and metabolic genes are associated with alterations of m(6)A in relevant mRNAs. LPS challenge significantly decreased hepatic mRNA expression of carnitine palmitoyl transferase 1 (CPT1) and CPT2, which coincided with a tendency of higher triglyceride accumulation in the liver...
October 2016: British Poultry Science
K Yamauchi, Y Matsumoto, K Yamauchi
The aims of the present study were to examine whether collagen exists in egg, particularly in egg yolk; to establish a Fourier transform-near infrared (FT-NIR) measurement method for collagen in egg and to assess the possibility of increasing the collagen content by feeding hens a diet containing wood charcoal powder containing wood vinegar liquid (WCV). The collagen in eggs from 67-week-old hens fed on the dietary 0 and 9.9 g/kg WCV diets was investigated using a combination of histochemical, matrix-assisted laser desorption ionisation with time-of-flight mass spectrometry (MALDI-TOF MS), Fourier transform infrared (FT-IR) and FT-NIR approaches...
October 2016: British Poultry Science
S Sgavioli, C H de Faria Domingues, D M C Castiblanco, M F F M Praes, Giuliana M Andrade-Garcia, E T Santos, S M Baraldi-Artoni, R G Garcia, O M Junqueira
Skeletal abnormalities, bone deformities and fractures cause significant losses in broiler production during both rearing and processing. Silicon is an essential mineral for bone and connective tissue synthesis and for calcium absorption during the early stages of bone formation. Performance was not affected by the addition of silicon. However, broilers receiving silicon showed a significant increase of phosphorus, zinc, copper, manganese and ash in the tibia. In conclusion, broiler performance was not impaired by adding the tested silicon product to the drinking water...
October 2016: British Poultry Science
J E Martin, K Christensen, Y Vizzier-Thaxton, D E F McKeegan
Low atmospheric pressure stunning (LAPS) is a novel approach to poultry stunning involving the application of gradual decompression lasting 280 s according to a prescribed pressure curve. The aim of this study was to determine how behavioural, electroencephalogram (EEG) and electrocardiogram (ECG) responses to LAPS are influenced by illumination of the decompression chamber. A secondary aim was to examine responses to the decompression chamber without LAPS being applied, as such a "sham" control has been absent in previous studies...
October 2016: British Poultry Science
M V Zbrun, L S Frizzo, L P Soto, M R Rosmini, G J Sequeira, D M Astesana, J E Blajman, E Rossler, A Berisvil, A Romero Scharpen, M L Signorini
The aim of this study was to investigate the use of indigenous lactic acid bacteria (LAB) with specific additives as a Biopreservation System (BS) for poultry blood during its storage in slaughterhouses. The BS consisted of two LAB (Enterococcus faecalis DSPV 008SA or Lactobacillus salivarius DSPV 032SA) with 4 additives (lactose 2 g/l, yeast extract 0.4 g/l, ammonium citrate 0.4 g/l and NaCl 1 g/l). After 24 h storage at 30ºC, lower counts of enterobacteria, coliforms, Pseudomonas spp. and Staphylococcus aureus were evident in blood treated with the BS than in untreated blood...
October 2016: British Poultry Science
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