British Poultry Science最新文献_第6页

Rhythmatic immune response to Campylobacter jejuni inoculation revealed by immune factors level in serum. 血清免疫因子水平揭示空肠弯曲杆菌接种后的节律性免疫应答。

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2026-01-07 DOI: 10.1080/00071668.2025.2595641

Y Zhao, Y Wang, Y Dong, Y Ren, L Liu, M Liang, J Liu, X Li

{"title":"Rhythmatic immune response to Campylobacter jejuni inoculation revealed by immune factors level in serum.","authors":"Y Zhao, Y Wang, Y Dong, Y Ren, L Liu, M Liang, J Liu, X Li","doi":"10.1080/00071668.2025.2595641","DOIUrl":"10.1080/00071668.2025.2595641","url":null,"abstract":"1. This study examined the rhythmatic immune response of chickens in the early stages of Campylabacter jejuni infection over time. Chickens were inoculated with C. jejuni at 10:00, 14:00 and 18:00 h, respectively.2. The C. jejuni populations in the caecal and the levels of IL-8, IL-18, IL-1β, IgA, IgY and cytokine signal transduction inhibitor 3 protein (SOCS3) in serum for each individual were measured at different hours after inoculation (hpi). Cosine and regression analyses were assessed for rhythmicity and correlations.3. The log10CFU of C. jejuni number in the caecal content was the lowest (7.4-8.1) at 10:00 h and highest (9.4-9.8) at 18:00 h. Inoculation status and time points post-inoculation had significant effects on IL-8, IL-18, IL-1β, IgA, IgY and SOCS3 levels (p < 0.001). The IL-8, IL-18, IL-1β and IgY levels at 16 hpi were the lowest compared to other post-inoculated time points.4. The IL-8, IL-1β, IgA and SOCS3 levels of the control and treated groups showed rhythmic changes at 18:00 (p < 0.05). Caecal C. jejuni colonisation was significantly correlated with levels of IL-18, IL-1β, IgA, IgY and SOCS3 (r = 0.35-0.76; p < 0.05), among which IgY had the highest correlation coefficient (r = 0.76; p < 0.0001).5. Chickens were more sensitive to C. jejuni inoculation administered at 18:00 h. Moreover, the changes of IgA, IL-8 and IL-1β levels were lowest at 16 hpi and more likely to show circadian rhythms in chickens inoculated at 18:00 h.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"533-540"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145910491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genome-wide analysis reveals domestication selection signals in Bashang long-tail chickens. 全基因组分析揭示坝上长尾鸡的驯化选择信号。

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2026-01-07 DOI: 10.1080/00071668.2025.2593634

Y Liang, B Yu, R Zhou, X Li

{"title":"Genome-wide analysis reveals domestication selection signals in Bashang long-tail chickens.","authors":"Y Liang, B Yu, R Zhou, X Li","doi":"10.1080/00071668.2025.2593634","DOIUrl":"10.1080/00071668.2025.2593634","url":null,"abstract":"1. Using whole-genome comparative analysis, this study elucidated the genetic differentiation characteristics and domestication selection mechanisms between Bashang long-tail chickens and their wild ancestor, the red junglefowl.2. Linkage disequilibrium (LD) analysis investigated genome-wide recombination patterns, while population genetic structure analysis was conducted to assess the degree of differentiation between the two populations. Additionally, a multi-method selective sweep analysis was performed to identify genomic regions under selection.3. The LD decay rate in Bashang long-tail chickens was significantly slower than in red junglefowl, which indicated reduced genome recombination due to long-term artificial selection. Population structure analyses, including neighbour-joining trees, principal component analysis and admixture assessments consistently revealed significant genetic differentiation between the two groups.4. By integrating fixation index, Tajima's D and nucleotide diversity ratio metrics, 102 high-confidence selective sweep regions were identified, encompassing 22 key candidate genes, including three genes (ALX1, RASSF9 and NTS) with potentially adaptive missense mutations, which exhibited strong selection signals. Functional enrichment analysis indicated that these genes were enriched in key biological pathways, including carbohydrate/protein metabolism and neural regulation.5. This data provided genomic signatures of domestication-driven adaptation variations accumulated during the domestication of Bashang long-tail chickens, offering new perspectives on the genetic mechanisms underlying chicken domestication. The study provided potential molecular markers for conserving local chicken genetic resources and molecular breeding.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"493-504"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145910535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlation between pepsin digestibility, metabolisable energy and digestibility coefficients of amino acids from animal meals for broilers. 肉鸡胃蛋白酶消化率、代谢能与动物粕氨基酸消化系数的相关性研究。

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2026-01-07 DOI: 10.1080/00071668.2025.2604605

J A Müller, F D C Tavernari, D Surek, J A S Marini, C J D S Teixeira, C Sordi, P G D S Pires, D Paiano, M M Boiago, T G Petrolli, A A Calderano

{"title":"Correlation between pepsin digestibility, metabolisable energy and digestibility coefficients of amino acids from animal meals for broilers.","authors":"J A Müller, F D C Tavernari, D Surek, J A S Marini, C J D S Teixeira, C Sordi, P G D S Pires, D Paiano, M M Boiago, T G Petrolli, A A Calderano","doi":"10.1080/00071668.2025.2604605","DOIUrl":"10.1080/00071668.2025.2604605","url":null,"abstract":"1. Three experiments were conducted to evaluate the predictive value of pepsin digestibility for estimating apparent metabolisable energy corrected for nitrogen balance (AMEn) and true ileal digestibility coefficients of amino acids (TIDCAA) in animal-origin meals (AOM) for broilers.2. Two poultry offal and bone meals (POBM1 and POBM2) and one swine offal and bone meal (SOBM) were assessed using in vivo and in vitro methods.3. In vivo trials determined AMEn and TIDCAA using a completely randomised design with 16 treatments, 8 replicates and 10 birds per replicate, while pepsin digestibility was measured in vitro.4. Pepsin digestibility showed variable correlations with nutrient values. In POBM1, only arginine showed a significant negative correlation with AMEn and TIDCAA. For POBM2, significant positive correlations with TIDCAA were observed only for lysine, histidine and glycine and for SOBM, a quadratic pattern was observed for TIDCAA, with no significant effect on AMEn.5. The results indicated that pepsin digestibility may be a useful predictor of amino acid digestibility in AOM, but its reliability for estimating AMEn was limited and dependent on ingredient type.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"600-607"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145917088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Amino acid, energy, phosphorus digestibility and phytate degradation in broiler chickens fed diets containing a meal from dehulled and ethanol-extracted rapeseed. 去皮和乙醇提取油菜籽饲粮对肉鸡氨基酸、能量、磷消化率和植酸降解的影响。

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2026-01-12 DOI: 10.1080/00071668.2025.2604609

R L Klötzer, H Philippi, W Siegert, M Rodehutscord

{"title":"Amino acid, energy, phosphorus digestibility and phytate degradation in broiler chickens fed diets containing a meal from dehulled and ethanol-extracted rapeseed.","authors":"R L Klötzer, H Philippi, W Siegert, M Rodehutscord","doi":"10.1080/00071668.2025.2604609","DOIUrl":"10.1080/00071668.2025.2604609","url":null,"abstract":"1. This study determined the pre-caecal digestibility of crude protein (CP), amino acids (AA), gross energy, phosphorus (P) and pre-caecal phytate (InsP6) disappearance of a dehulled and ethanol-extracted rapeseed kernel meal (RKM) without and with exogenous phytase in broiler chickens.2. The experiment utilised a 3 × 2 factorial design with the factors RKM inclusion (0, 12.5 or 25%) and phytase supplementation (0 or 1500 FTU/kg). Diets were fed to Ross 308 broiler chickens from 16 to 21 d of age raised in floor pens (seven per diet).3. The RKM inclusion decreased the digestibility of certain AA (p < 0.05) and phytase increased the digestibility of CP and all AA in the diets (p < 0.05). CP digestibility in RKM, calculated by linear regression, was 75% without and 80% with phytase and Lys digestibility was 81% without and 85% with phytase. There was no significant phytase effect on the slopes of regression lines.4. With increasing RKM inclusion, pre-caecal InsP6 disappearance decreased without phytase and increased with phytase (RKM × phytase: p < 0.010). Increased RKM inclusion reduced the amount of digestible P without phytase, whereas with phytase, the amount of digestible P increased with RKM inclusion (RKM × phytase: p < 0.001).5. Pre-caecal gross energy digestibility decreased with RKM inclusion (p < 0.001) and increased with phytase supplementation (p < 0.05). Crude protein and AA digestibility of the RKM was high and increased with phytase supplementation. The P from RKM was not digestible without phytase.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"642-652"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145951585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comparative analysis of indicators of fertility duration in hens. 母鸡生育期指标的比较分析。

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2026-01-12 DOI: 10.1080/00071668.2025.2598836

M A Kabir, J Li, K Yang, H Ruan, L Rong, J Li, B D P Soewandi, S Li

{"title":"A comparative analysis of indicators of fertility duration in hens.","authors":"M A Kabir, J Li, K Yang, H Ruan, L Rong, J Li, B D P Soewandi, S Li","doi":"10.1080/00071668.2025.2598836","DOIUrl":"10.1080/00071668.2025.2598836","url":null,"abstract":"1. This study identified the most effective indicator for assessing the duration of fertility (DF) in chickens by comparing six potential indicators; number of fertilised eggs (NFE), maximum number of fertilised eggs continuously produced (MNFE), effective duration of fertility (EDF), fertility duration day (FDD), maximum duration of fertility conditional (MDFC) and maximum duration of fertility (MDF).2. This study used 1162 Xinhua chickens in two groups: 764 parental (unselected) and 398 selected (first-generation obtained from the parent MNFE > 6) groups, with three lines (B, C and D) in each group. Data from two artificial insemination cycles (17 d) in 60-week-old birds were used to calculate the indicator value. Subsequently, a comparative analysis of the indicators, heritability, selection response and repeatability was conducted within and between groups to assess genetic and environmental influences. Correlation analysis was performed to evaluate the relationship between the indicators and egg production status (unfertilised egg production (UEP), total egg production number (TEP) and individual fertility rate (IFR)).3. Comparing the two groups, there were significant (p < 0.001) differences in all indicators except MDFC and MDF. Among the indicators, NFE exhibited the highest heritability (h2 = 0.23), the strongest selection response (R = 0.80) and the highest repeatability in both groups. Analysis showed that NFE was significantly (p < 0.001) correlated with all indicators and highly correlated with TEP(r = 0.73), IFR (r = 0.74) and negatively moderately correlated with UEP (r = -0.49).4. The data suggested that NFE was the most reliable DF indicator, offering consistency and comparatively higher genetic influence.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"515-521"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145951521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of autosomal recessive gene (ce) on quail egg shell properties. 常染色体隐性基因（ce）对鹌鹑蛋壳性状的影响。

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2026-01-07 DOI: 10.1080/00071668.2025.2599987

K Damaziak, W Wójcik, A Marzec, J Riedel, J Niemiec

{"title":"Effects of autosomal recessive gene (ce) on quail egg shell properties.","authors":"K Damaziak, W Wójcik, A Marzec, J Riedel, J Niemiec","doi":"10.1080/00071668.2025.2599987","DOIUrl":"10.1080/00071668.2025.2599987","url":null,"abstract":"1. This study investigated whether the recessive ce gene, which causes the celadon shell colour in Japanese quail eggs and affects the shell structure and quality of both fresh eggs and eggs stored for 28 days at 4°C.2. Analyses were conducted on 54 fresh and 54 stored eggs from four quail groups, including those with typically wild-type shell pigmentation: Jumbo, Pharaoh and Texas, as well as Celadon laying eggs with reduced protoporphyrin (ce). Results included shell weight, ratio of shell to egg weight, shell strength with simultaneous acoustic measurement and shell microstructure using computed microtomography (both 2D and 3D). The quality of fresh and stored eggs was evaluated based on egg weight, yolk weight and proportion (%), yolk index, albumen quality, vitelline membrane strength and elasticity, pH and water activity of yolk and albumen and yolk viscosity. Egg weight (water) loss was measured in stored eggs.3. Celadon eggs had a higher number of shell pores, but the average pore area and its area-equivalent circle diameter were smaller. No differences in eggshell strength were found between Celadon and wild-type pigmented eggs, which was confirmed by acoustogram analysis. Celadon shells displayed a negative Euler number, which indicated strong connections between adjacent pores. This structural enhancement may be an adaptation to compensate for reduced protoporphyrin content.4. Celadon quail eggs were similar in quality to those of the other groups and could be stored with similar results. The greatest weight loss during storage was observed in Texas quail eggs, which exhibited the highest porosity (based on the number and surface area of pores) and the greater morphometric water vapour conductance.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"552-561"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145910527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Protease supplementation in diets with varying crude protein levels: effects on production performance and blood biochemistry of aged laying hens. 不同粗蛋白质水平饲粮中添加蛋白酶对老龄蛋鸡生产性能和血液生化的影响

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2026-01-07 DOI: 10.1080/00071668.2025.2602178

M Umar Faruk, A J Cowieson, R Aureli, H Liu

{"title":"Protease supplementation in diets with varying crude protein levels: effects on production performance and blood biochemistry of aged laying hens.","authors":"M Umar Faruk, A J Cowieson, R Aureli, H Liu","doi":"10.1080/00071668.2025.2602178","DOIUrl":"10.1080/00071668.2025.2602178","url":null,"abstract":"1. This study was conducted to evaluate the effect of dietary crude protein level and protease supplementation on production performance and blood biochemical traits of aged laying hens.2. Forty Lohmann Brown hens at 68 weeks of age were fed two diets differing in crude protein levels (CP, 120 g/kg or 160 g/kg), supplemented or not with protease at 50.0 mg/kg feed. Each treatment included ten replicate cages with one hen per replicate. The study lasted for a duration of 32 weeks. Egg production performance was measured every 4 weeks and blood chemistry and electrolyte variables were assessed at the end of the study.3. Results showed that there was no interaction (p > 0.05) between dietary crude protein level and protease supplementation on any production or blood measurements. Hens fed 120 g/kg CP diet had lower (p < 0.05) production rate, egg mass, feed intake, body weight and less favourable feed conversion ratio (FCR) compared to those fed 160 g/kg CP diet. Supplementation with protease, independent of dietary crude protein level, increased egg production (+4.8 points; p < 0.05) and mass (+3.3 g; p < 0.05), blood creatine kinase (+103%; p < 0.05) and decreased FCR (-0.51points; p < 0.05) and blood phosphorus (-18%; p < 0.05).4. The results demonstrated that protease supplementation enhanced egg production performance in aged laying hens, regardless of whether they were fed CP-adequate or deficient diets. This improvement could be partially associated with accelerating energy metabolism, as evidenced by elevated blood creatine kinase levels. These findings highlighted the potential of protease to reduce dietary protein inclusion while extending laying hens' productive lifespan and enabling the development of blood biochemical signatures for exogenous protease applications.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"638-641"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145917115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic and antigenic analysis of the highly pathogenic avian influenza H5N8 virus clade 2.3.4.4b isolated from waterfowl in Egypt during 2022; evidence of brain-specific HA mutations. 2022年埃及水禽高致病性H5N8病毒分支2.3.4.4b的遗传和抗原分析脑特异性血凝素突变的证据

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2026-01-07 DOI: 10.1080/00071668.2025.2585438

M Ibrahim, A Said, M A Wahba, N Yehia

{"title":"Genetic and antigenic analysis of the highly pathogenic avian influenza H5N8 virus clade 2.3.4.4b isolated from waterfowl in Egypt during 2022; evidence of brain-specific HA mutations.","authors":"M Ibrahim, A Said, M A Wahba, N Yehia","doi":"10.1080/00071668.2025.2585438","DOIUrl":"10.1080/00071668.2025.2585438","url":null,"abstract":"1. This study characterised the H5N8 highly pathogenic avian influenza (HPAI) viruses, clade 2.3.4.4b from backyard waterfowl selected from Menoufia governorate during 2022. Genetic and antigenic analysis of H5N8 isolates was performed and the genetic markers for waterfowl brain invasion were analysed by whole genome sequencing.2. Molecular diagnosis of field samples showed that, out of 30 tested waterfowl flocks showing respiratory and nervous symptoms of the disease, 13 duck flocks and 11 geese flocks were confirmed positive for H5N8 by RT-qPCR.3. The whole genome sequencing for four H5N8 strains were performed from duck and geese flocks. Phylogenetic analysis of the hemagglutinin (HA) gene revealed that the 2022 isolates clustered with Russian and European-like strains. All strains had a polybasic cleavage site (PLREKRRKRGLF), indicating high pathogenicity. Mutations, such as A140T, G268E, R82K, and I162M, were identified and linked to antigenic drift and adaptation.4. Brain-derived isolates showed specific HA mutations (e.g. F244L, I248S, K234R) compared to tracheal isolates, which suggested possible roles in neurotropism. Internal genes revealed mammalian adaptation markers such as 504 V (PB2), 127 V and 672 L (PA), and 133 G (PB1), with additional unique mutations observed H5N8 strains isolated from geese in 2022. Reassortment analysis for the 8 gene segments showed that H5N8 duck strains isolated in 2018 belonged to genotype G1, while the 2022 strains belonged to genotype G4. This confirmed changes after 2018 and reflecting continuous viral evolution through segment reassortment.5. Antigenic analysis revealed that the newly introduced H5N1 virus clade 2.3.4.4b is antigenically similar with H5N8 viruses from the same clade, while different from viruses in other clades.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"582-591"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145910576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ensemble-based deep learning approach for early detection of poultry diseases using faecal images. 基于集成的粪便图像家禽疾病早期检测的深度学习方法。

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2025-12-15 DOI: 10.1080/00071668.2025.2588246

H S Das, K Talukdar, K Bora, K Borah

{"title":"Ensemble-based deep learning approach for early detection of poultry diseases using faecal images.","authors":"H S Das, K Talukdar, K Bora, K Borah","doi":"10.1080/00071668.2025.2588246","DOIUrl":"10.1080/00071668.2025.2588246","url":null,"abstract":"1. Early identification of various poultry illnesses may be possible with deep learning techniques. Salmonellosis, newcastle disease and coccidiosis illnesses can present poor faecal scores as symptoms. A deep convolutional neural network (CNN) model known as an 'ensemble-based CNN' was constructed to identify poultry diseases by classifying healthy and unhealthy faecal images and tested on farm.2. Four distinct deep learning models; MobileNetV2, EfficientNetB0, Xception and ResNet50V2, were compared and their corresponding inference findings recorded. To identify the best results, ensemble techniques and transfer learning, using a fine-tuning approach, were applied.3. Evaluation scores for accuracy, precision and recall were used to assess the four models to determine which performed best.4. The sum-ensemble approach and weighted average ensemble algorithm achieved 99% and the majority voting ensemble achieved 98.5% accuracy, respectively.5. The Xception model outperformed the three other models in identifying type of disease. Therefore, Xception was deemed the preferred model when accuracy is the main concern whereas the ensemble approach enhanced the performance of identification.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"676-685"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145755254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The alleviating effect of dietary electrolyte balance levels on heat stress via regulating water and ion metabolism in Pekin ducks. 饲粮电解质平衡水平通过调节北京鸭水分和离子代谢对热应激的缓解作用

IF 1.7 3区农林科学

British Poultry Science Pub Date : 2026-08-01 Epub Date: 2026-01-12 DOI: 10.1080/00071668.2025.2604112

H Liu, G Tian, K Zhang, X Ding, S Bai, J Wang, Y Liu, Y Xuan, S Li, Q Zeng

{"title":"The alleviating effect of dietary electrolyte balance levels on heat stress via regulating water and ion metabolism in Pekin ducks.","authors":"H Liu, G Tian, K Zhang, X Ding, S Bai, J Wang, Y Liu, Y Xuan, S Li, Q Zeng","doi":"10.1080/00071668.2025.2604112","DOIUrl":"10.1080/00071668.2025.2604112","url":null,"abstract":"1. The objective of this study was to evaluate the effects of dietary electrolyte balance (DEB) concentrations on growth performance, heat sensitivity biomarkers and water and ion metabolism of meat ducks under heat stress (HS).2. A total of 400, 28-d-old Cherry Valley male meat ducks were randomly divided into five treatment groups (eight pens per treatment with 10 birds/pen), with dietary different DEB values, 120, 160, 200, 240 and 280 mmol/kg.3. Ducks in the 240-mmol/kg DEB group had a tendency (p = 0.098) for increased body weight at 41 d of age. The 240-mmol/kg DEB group displayed the numerically highest daily gain, the best FCR and lowest mortality among all treatment groups. Serum corticosterone (CORT) concentration in ducks from the 240-mmol/kg DEB group was significantly lower than that in the 280-mmol/kg DEB group (p < 0.05) and chlorine concentration had a tendency to fall (p = 0.083).4. The 240-mmol/kg DEB group significantly upregulated the expression of aquaporins (AQP) mRNA in the small intestine (AQP3 and AQP7), kidney (AQP3, AQP7, AQP9 and AQP10) and thenasal salt gland (AQP3 and AQP10). In addition, it upregulated the expression of ion transporter (Na-K-Cl cotransporter and Na-/K-ATPase) mRNA in the small intestine, kidney and nasal salt gland.5. Based on the overall benefits in growth performance, biochemical measures, tissue AQP and expression of ion transporters, an optimal level of DEB in diets for heat stressed ducks was 240 mmol/kg.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"653-661"},"PeriodicalIF":1.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145951524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0