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British Poultry Science

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https://www.readbyqxmd.com/read/29774758/evaluation-of-natural-bv-as-a-novel-feed-additive-in-fast-growing-broilers
#1
Da Hye Kim, Sang Mi Han, Moung Cheul Keum, Sang Lee, Byoung Ki An, Sang-Rak Lee, Kyung-Woo Lee
1. The present study was designed to evaluate purified bee venom (BV) as an alternative to antibiotics in broiler chickens. The experimental treatment diets were formulated by adding BV into a maize-soybean meal-based diet to give 0, 10, 50, 100, and 500 μg BV per kg of diet. 2. Dietary BV quadratically improved (P<0.05) feed conversion ratio and increased body weight gain at 1-21 days as level in diet increased. Higher BV levels lowered relative weight of spleen (linear and quadratic, P<0.05), bursa of Fabricius (quadratic, P<0...
May 18, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29768949/in-vitro-and-in-vivo-assessment-of-the-effect-of-initial-moisture-content-and-drying-temperature-on-the-feeding-value-of-maize-grain
#2
François Huart, Paul Malumba, Sylvanus Odjo, Wail Al-Izzi, François Béra, Yves Beckers
1. This study assessed the impact of drying temperature (54, 90, and 130°C) and maize grain moisture content at harvest (36% and 29%) on in vitro digestibility and the growth performance and ileal digestibility of broiler chickens. 2. In contrast to the results from the in vitro digestibility, apparent ileal digestibility of starch and energy decreased when the drying temperature was raised from 54°C to 130°C, and this effect was more pronounced in maize grain harvested at high initial moisture content (36%)...
May 17, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29768944/zataria-multiflora-essential-oil-reduces-replication-rate-of-avian-influenza-virus-h9n2-subtype-in-challenged-broiler-chicks
#3
Arzhang Shayeganmehr, Mehdi Vasfi Marandi, Vahid Karimi, Abbas Barin, Arash Ghalyanchi-Langeroudi
The effect of Zataria multiflora essential oil on replication rate of the H9N2 virus in target organs was determined by real-time PCR. One-day-old broiler chicks were randomly divided into six groups and were challenged with H9N2 influenza. Two groups received either 20 or 40 µl/kg body weight/day Zataria multiflora essential oils (ZM) seven days before the challenge while two other groups received the essential oil at the same dosage but after H9N2 challenge. One group received 4 mg/kg body weight/day of the anti-viral compound amantadine after challenge and the last group received no treatment and served as the control...
May 17, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29764188/effects-of-extruded-flaxseed-on-layer-performance-nutrient-digestibility-and-yolk-fatty-acid-composition
#4
S Huang, B Baurhoo, A Mustafa
1. This study was conducted to determine the effects of feeding an extruded flaxseed (EF) on layer performance, apparent total tract nutrient digestibility (ATTD), and egg yolk fatty acid concentrations. 2. Seventy-two White Leghorn laying hens (58-week-old; three per cage) were randomly allotted to one of four dietary treatments: 0, 7.5, 15.0 and 22.5% of EF-supplemented diets for eight weeks. 3. Supplementation with EF had no effect on feed intake, egg production, feed conversion ratio, and egg weight. Egg components (yolk, albumen, and shell percentages) were similar among treatments, except that shell percentage was greater for layers fed 22...
May 15, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29756995/guanidinoacetic-acid-supplementation-in-broiler-chickens-fed-corn-soybean-diets-affects-performance-in-the-finisher-period-and-energy-metabolites-in-breast-muscle-independent-of-diet-nutrient-density
#5
Maryam Majdeddin, Abolghasem Golian, Hassan Kermanshahi, Stefaan De Smet, Joris Michiels
Guanidinoacetic acid (GAA) is the single immediate endogenous precursor of creatine. It was hypothesised that dietary GAA would have different effects on performance and energy metabolites in breast muscle depending on the nutrient density (ND) of corn-soybean based diets. A total of 540 one-day-old male Ross 308 broilers were allocated to nine dietary treatments with six replicates (10 birds each) in a 3 × 3 factorial arrangement with three levels of ND (low, 2800; medium, 2950 and high, 3100 kcal ME/kg; and with the other nutrients being constant relative to ME) and supplemented with three levels of GAA (0, 0...
May 14, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29741100/identification-of-candidate-genes-for-blood-metabolites-in-iranian-chickens-using-a-genome-wide-association-study
#6
A Javanrouh-Aliabad, R Vaez Torshizi, A A Masoudi, A Ehsani
In order to identify loci associated with metabolic traits, a genome-wide association study (GWAS) was carried out in a chicken F2 population derived from a reciprocal cross between Iranian Uromia indigenous chickens and Arian broiler line using Illumina 60K Chicken SNP Beadchip. Six traits including plasma level of triglycerides (TG), cholesterol (Chol), glucose (Glu), total protein (TP), albumin (Alb) and globulin (Glo) were recorded. The association between the identified SNPs and metabolic traits was estimated by general linear model (GLM) and compressed mixed linear model (CMLM)...
May 9, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29737191/the-association-between-extended-spectrum-beta-lactamase-esbl-and-ampicillin-c-ampc-beta-lactamase-genes-with-multidrug-resistance-in-escherichia-coli-isolates-recovered-from-turkeys-in-brazil
#7
Patrícia Giovana Hoepers, Paulo Lourenço Silva, Daise Aparecida Rossi, Edson Campos Valadares Júnior, Bruna Custódio Ferreira, João Paulo Zuffo, Priscilla Karina Koerich, Belchiolina Beatriz Fonseca
ABSTRACT- 1. The aim of this study was to analyse the association between Escherichia coli isolates recovered from turkeys and the expression of beta-lactamase genes, such as extended spectrum beta lactamase (ESBL) and ampicillin class C (AmpC). The phenotype of the resistance profile was examined using the association between amoxicillin and ceftiofur resistance. 2. Results showed that 84% from the turkey isolates harboured four or five genes associated with the CoIV plasmid. In an antibiogram test, 82% of the isolates were multi-drug resistant (MDR), the highest levels of resistance being against erythromycin (99%) and amoxicillin (76...
May 8, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29723039/transcriptome-profiling-to-identify-key-mediators-of-granulosa-cell-proliferation-upon-fsh-stimulation-in-the-goose-anser-cygnoides
#8
Lei Du, Tiantian Gu, Yang Zhang, Zhengyang Huang, Wenming Zhao, Guobin Chang, Qi Xu, Guohong Chen, Ningzhao Wu
1. The low reproductive performance of geese has seriously hampered the development of the industry. Reproductive performance, particularly the egg laying rate mainly depends on the development of the follicle. Previous studies have shown that follicle-stimulating hormone (FSH) plays an important role in the process of follicular development, but the exact underlying mechanism remains unclear. 2. This study showed that FSH-stimulated granulosa cell proliferation in a dose-dependent manner. The effect of FSH treatment on granulosa cell proliferation was greatest at a dose of 100 mIU/ml FSH for 24 h...
May 3, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29701510/high-low-or-familiar-nest-site-preferences-of-experienced-laying-hens
#9
E Tobias Krause, Lars Schrader
1. The aim of this study was to investigate which nest heights are preferred by high producing laying hens in the absence of familiar nest locations and whether preferred nest heights are more attractive than a familiar location. In two experiments, a total of 108 hens of four different layer breeds, which were at least 50 weeks of age, were studied. 2. In the first experiment, hens were given individual free choice between nests for one-week at four different heights (0 cm, 39 cm, 78 cm, 117 cm above ground) which were unequal to the familiar nest location...
April 27, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29667846/effect-of-gender-on-breast-and-thigh-turkey-meat-quality
#10
F Gálvez, R Domínguez, M Pateiro, J Carballo, I Tomasevic, J M Lorenzo
1. The influence of gender on chemical composition, physicochemical parameters, fatty acid profile, amino acid and mineral composition of turkey breast and thigh meat was studied in order to assess nutrient requirements. 2. Chemical composition showed that only intramuscular fat in breast meat was significantly affected by gender (P<0.05). The results showed a higher percentage of intramuscular fat in male samples, almost double the amount found in females (0.73% vs. 0.38%). 3.For meat colour parameters, only a* showed different results between sexes, with male samples (breast: P<0...
April 18, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29667432/identification-and-characterisation-of-micrornas-and-piwi-interacting-rnas-in-cockerels-spermatozoa-by-solexa-sequencing
#11
Shengru Wu, Jiacheng Guo, Liqin Zhu, Jiantao Yang, Si Chen, Xiaojun Yang
1. There has been substantial research focused on the roles of microRNAs (miRNA) and PIWI-interacting RNAs (piRNA) delivered from mammalian spermatozoa, however comparatively little is known about the role of spermatozoa-delivered miRNAs and piRNAs within breeding cockerels' spermatozoa. 2. A small RNA library of cockerels' spermatozoa was constructed using Illumina high-throughput sequencing technology. Unique sequences with lengths of 18-26 nucleotides were mapped to miRBase 21.0 and unique sequences with lengths of 25-37 nucleotides were mapped to a piRNA database...
April 18, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29667421/associations-between-variants-of-bone-morphogenetic-protein-7-gene-and-growth-traits-in-chickens
#12
Yan Wang, Fuyou Guo, Hao Qu, Chenglong Luo, Jie Wang, Dingming Shu
1. Enhancing bone strength to solve leg disorders in poultry has become an important goal in broiler production. 2. Bone morphogenetic protein 7 (BMP7), a member of the BMP family, represents an attractive therapeutic target for bone regeneration in humans and plays critical roles in skeletal development. 3. The objective of this study was to investigate the relationship between BMP7 gene expression, single nucleotide polymorphisms (SNPs) and growth traits in chickens. Here, a SNP (c.1995T>C) in the chicken (Gallus gallus) BMP7 gene was identified, that was associated with growth and carcass traits...
April 18, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29659310/effect-of-feeding-broccoli-floret-residues-on-leghorn-layer-performance-and-egg-quality-and-nutrient-digestibility
#13
A F Mustafa, B Baurhoo
1. A study was conducted to determine the effects of dried broccoli floret (DBF) on egg production parameters, egg quality, and apparent nutrient digestibility of laying hens. It was hypothesised that feeding DBF can improve egg quality without adversely affecting layer performance. 2. Seventy-two White Leghorn layers aged 62 weeks were randomly allotted to four dietary treatments (six cage replicates with three hens each) and fed diets containing 0, 40, 80, and 120 g/kg DBF in feed for 56 d. 3. Inclusion of DBF had no effect on feed intake, egg production, feed conversion ratio or egg components...
April 16, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29620417/body-growth-intestinal-morphology-and-microflora-of-quail-on-diets-supplemented-with-micronised-wheat-fibre
#14
Mehdi Rezaei, Mohammad Amir Karimi Torshizi, Helena Wall, Emma Ivarsson
Particle size reduction of fibre rich materials alter structure, functional and digestive properties. To determine the effects of using fibre as an additive in Japanese quail rations on performance and gut physiology, a trial using micronised wheat fibre (MWF) at levels of 0.0, 5, 10 and 15 g/kg in feed was conducted. Growth rate and feed efficiency were significantly improved when diets contained MWF while feed intake was not affected by levels of the fibre. As MWF content increased, the relative weight of gizzard and GIT significantly increased whereas liver relative weight significantly decreased...
April 5, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29595321/influence-of-graded-inclusion-of-white-lupin-lupinus-albus-meal-on-performance-nutrient-digestibility-and-ileal-viscosity-of-laying-hens
#15
Marta Kubiś, Sebastian Andrzej Kaczmarek, Sebastian Nowaczewski, Marek Adamski, Marcin Hejdysz, Andrzej Rutkowski
1. The aim of this study was to investigate the effect of white lupin (Lupinus albus) meal (WLM) addition on the intestinal viscosity, bird performance, and nutrient utilisation of laying hens. 2. The experiment was conducted with 360 laying hens aged 21 weeks fed one of six treatments, including a corn-soybean meal control diet (CON) and five experimental diets containing 60, 120, 180, 240, and 300 g/kg WLM. 3. A linear increase in feed intake (P<0.001) was observed with higher levels of WLM from 0 to 300 g/kg...
March 29, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29480030/physicochemical-determinants-of-ph-in-pectoralis-major-of-three-strains-of-laying-hens-housed-in-conventional-and-furnished-cages
#16
K M Frizzell, M J Jendral, I M Maclean, W T Dixon, C T Putman
1. Post-mortem decline in muscle pH has traditionally been attributed to glycogenolysis-induced lactate accumulation. However, muscle pH ([H+ ]) is controlled by complex physicochemical relationships encapsulated in the Stewart model of acid-base chemistry and is determined by three system-independent variables - strong ion difference ([SID]), total concentration of weak acids ([Atot ]) and partial pressure of CO2 (PCO2 ). 2. This study investigated these system-independent variables in post-mortem pectoralis major muscles of Shaver White, Lohmann Lite and Lohmann Brown laying hens housed in conventional cages (CC) or furnished cages (FC) and evaluated the model by comparing calculated [H+ ] with previously measured [H+ ] values...
March 23, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29564910/tall-oil-fatty-acid-inclusion-in-the-diet-improves-performance-and-increases-ileal-density-of-lactobacilli-spp-in-broiler-chickens
#17
K Vienola, G Jurgens, J Vuorenmaa, J Apajalahti
1. Studies were conducted with tall oil fatty acids (TOFA) to determine their effect on broiler chicken performance and ileal microbiota. TOFA, a product originating from coniferous trees and recovered by fractional distillation of side-streams from pulp production, mainly comprises free long-chain fatty acids (~90%) and resin acids (~8%). Conjugated linolenic acids and pinolenic acid are characteristic fatty acid components of TOFA. 2. TOFA products at 750 mg/kg feed were tested in two 35-day broiler chicken trials, each using a wheat soya-based diet and with 12 replicate pens per treatment...
March 22, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29533082/achieving-sustainable-production-of-eggs-volume-2-animal-welfare-and-sustainability
#18
V Sandilands
No abstract text is available yet for this article.
March 22, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29532680/achieving-sustainable-production-of-eggs-volume-1-safety-and-quality
#19
I C Dunn
No abstract text is available yet for this article.
March 22, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29557194/inhibition-of-heat-stress-related-apoptosis-of-chicken-myocardial-cells-through-inducing-hsp90-expression-by-aspirin-administration-in-vivo
#20
Xiaohui Zhang, Miao Zhang, Yanan Su, Zhe Wang, Qiling Zhao, Huaisen Zhu, Zhuang Qian, Jiao Xu, Shu Tang, Di Wu, Ye Lin, Nicole Kemper, Joerg Hartung, Endong Bao
1. This experiment investigated the anti-apoptosis effects and the mechanism of aspirin action in the heat shock response of chicken myocardial cells in vivo, via changes in the heat stress protein Hsp90 and the rate of apoptosis. Broiler chickens were administered aspirin (1 mg/kg body weight) 2 h before exposure to heat stress, and then exposed to 40±1°C for 0, 1, 2, 3, 5, 7, 10, 15 and 24 h. 2. The induction and consumption of the heat stress factor HSF-1, and reductions of HSF-2 and HSF-3 induced by heat stress led to a delay in Hsp90 expression...
March 20, 2018: British Poultry Science
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