British Poultry Science最新文献_第2页

MFSnet: a multi-scale feature screening network for chicken counting in dense environments. MFSnet：用于密集环境下鸡计数的多尺度特征筛选网络。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-02 DOI: 10.1080/00071668.2025.2500346

G Ma, Z Xiao, F Yuan, E Sun, S Chen, J Liu, B He

{"title":"MFSnet: a multi-scale feature screening network for chicken counting in dense environments.","authors":"G Ma, Z Xiao, F Yuan, E Sun, S Chen, J Liu, B He","doi":"10.1080/00071668.2025.2500346","DOIUrl":"https://doi.org/10.1080/00071668.2025.2500346","url":null,"abstract":"1. Machine-vision-based chicken counting is a highly efficient approach. Nonetheless, in scenarios with high breeding densities, chickens in the captured images frequently overlap with one another. This research addressed the challenge of accurately counting chickens within a free-range chicken coop in densely environments. It proposes a chicken-counting network specifically designed for dense scenarios, namely MFSnet.2. The study extracted multi-scale feature maps and subjected them to processing during the fusion stage via a Feature Screening Module (FSM). This module generated feature maps that were richly endowed with features from diverse scales to enhance information, thereby augmenting the network's capacity to accurately identify chickens.3. The dataset was collected and labelled and denominated as Chicken2023. It consisted of 550 images, which, in aggregate, encompassed a total of 49 747 chickens. To validate its efficacy, it was compared with extant counting algorithms. The experimental findings derived from the Chicken2023 dataset illustrated that this method attained a better counting performance level. It achieved a mean absolute error (MAE) of 2.7 and a root mean square error (RMSE) of 3.6. When juxtaposed with the top-performing network, it showed a notable improvement, with a 6.25% reduction in MAE and a 6.26% reduction in RMSE.4. The network model proposed in this study accurately recognised the number of chickens in dense environments and improved the efficiency of poultry farming.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-11"},"PeriodicalIF":1.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144198294","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

Different energy and protein levels for growth performance, serum biochemistry and intestinal development of squabs (Columba livia) under artificial feeding conditions. 人工饲养条件下不同能量和蛋白质水平对乳鸽生长性能、血清生化和肠道发育的影响。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-02 DOI: 10.1080/00071668.2025.2508215

T W Liu, J G Zhu, J Y Chen, X M Meng, Y Q Shi, Z Y Zhang, H X Huan, Y Liu, P Xie

{"title":"Different energy and protein levels for growth performance, serum biochemistry and intestinal development of squabs (Columba livia) under artificial feeding conditions.","authors":"T W Liu, J G Zhu, J Y Chen, X M Meng, Y Q Shi, Z Y Zhang, H X Huan, Y Liu, P Xie","doi":"10.1080/00071668.2025.2508215","DOIUrl":"https://doi.org/10.1080/00071668.2025.2508215","url":null,"abstract":"1. The purpose of this study was to investigate the effects of different metabolisable energy (ME) and crude protein (CP) levels on the growth performance, serum biochemical indices, and intestinal development of pigeon squabs.2. A total of 324, 12 d old squabs were used and fed one of three ME (13, 12.5 and 12 MJ/kg) and three CP levels (18, 17 and 16%) to give nine experimental diets with six replicates each containing six birds (n = 6).3. Body weight of squabs at 28 d of age were the highest in group 3 (13 MJ/kg ME, 16% CP). Increasing ME or CP levels significantly elevated the relative weight of abdominal fat of squabs.4. A higher ME level in the diet induces higher serum content of total cholesterol and low-density lipoprotein, and greater levels of aspartate aminotransferase activity in 28 d old squabs. Compared with lower CP (16%) treatment, 18% dietary CP significantly increased the contents of serum urea nitrogen and uric acid. Duodenal villus length and pancreatic trypsin activity were the greatest in diet 3.5. The optimal dietary energy and protein levels of artificial crop milk for pigeon squabs in the late stage of growth were 13 MJ/kg ME and 16% CP from days 12-28 of age.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-11"},"PeriodicalIF":1.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207796","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

Plant-based calcitriol reduced the requirements of calcium and available phosphorus in broiler chicken diet. 植物性骨化三醇降低了肉鸡日粮中钙和有效磷的需取量。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-02 DOI: 10.1080/00071668.2025.2506089

S V Rama Rao, E T Reddy, M V L N Raju, B Prakash, S S Paul, T Srilatha, A Kannan, D Nagalaksmi

{"title":"Plant-based calcitriol reduced the requirements of calcium and available phosphorus in broiler chicken diet.","authors":"S V Rama Rao, E T Reddy, M V L N Raju, B Prakash, S S Paul, T Srilatha, A Kannan, D Nagalaksmi","doi":"10.1080/00071668.2025.2506089","DOIUrl":"https://doi.org/10.1080/00071668.2025.2506089","url":null,"abstract":"1. An experiment was conducted to study the effects of supplementing calcitriol (CT) on performance and bone mineralisation in broilers (1-42 d) fed a calcium and available phosphorus (Ca-aP)-deficient diet. The CT (10 mg/kg 1,25-di-OH-VitD3) was derived from Solanum glaucophyllum leaf.2. A control diet (CD) with the recommended (Cobb 400) levels of Ca (9.4, 9.2 and 8.8 g/kg) and aP (4.5, 4.2 and 4 g/kg, respectively, in starter, grower and finisher) was prepared. Six experimental diets were prepared, which include two reduced diets (RD) formulated with 80% (R80) and 70% (R70) of the recommended levels of Ca and aP. Both RDs were supplemented with three levels of CT (0, 1 and 2 µg/kg). Each diet was offered ad libitum to 10 replicate pens (198 × 122 cm) containing 25 male broilers each from 1 to 42 d of age.3. Body weight gain (BWG) and feed conversion (FCE) were recorded bi-weekly. The degree of hock joint deformity was measured as leg abnormality score (LAS) and concentrations of Ca and P in serum were analysed on d 43. The right tibia was analysed for total ash, Ca and P in tibia ash.4. The BWG was not affected by either the reduction of Ca and aP or the supplementation of CD to the RD. Similarly, FCE was not affected by reducing the Ca and aP to 80%, while at 70%, the FCE was reduced compared to the CD group. Supplementation with CT significantly improved the FCE similar to the CD group during the starter phase and overall period (1-42 d).5. The LAS increased and bone minerals (as tibia ash and its Ca and P contents) reduced in broilers fed both RD. Supplementation with CT at 2 µg/kg significantly reduced LAS and improved the bone mineral variables similar to those fed the CD.6. Dietary Ca and aP levels can be reduced to 70% of the dietary recommendations for the broiler breed with supplementation of calcitriol at 2 µg/kg without affecting the performance and bone mineralisation.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-6"},"PeriodicalIF":1.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144198295","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

Comprehensive analysis of mRNA and miRNA expression profiles in follicular development in quail. 鹌鹑卵泡发育中mRNA和miRNA表达谱的综合分析。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-02 DOI: 10.1080/00071668.2025.2451263

X Zhang, L Liu, Y Liu, Y Liu, J Yang

{"title":"Comprehensive analysis of mRNA and miRNA expression profiles in follicular development in quail.","authors":"X Zhang, L Liu, Y Liu, Y Liu, J Yang","doi":"10.1080/00071668.2025.2451263","DOIUrl":"https://doi.org/10.1080/00071668.2025.2451263","url":null,"abstract":"1. Ovarian follicle development is a key determinant of egg production in quail which is regulated by a dynamic and stage-specific genetic program. However, most follicle-related genes and miRNAs have not yet been identified in quail.2. This study applied transcriptome sequencing to dissect mRNA and miRNA expression patterns in quail ovarian follicles at distinct developmental stages: the pre-selection (SYF), the post-selection (F5) and the pre-ovulatory follicles (F1) in egg-laying birds. Comparative analyses identified 362 differentially-expressed mRNAs and 13 miRNAs in the F1 vs. F5 comparison, 549 and 72 in the F5 vs. SYF comparison and 1833 and 55 in the F1 vs. SYF comparison, respectively.3. Significant differentially-expressed mRNAs implicated in follicle development included VCAN, FGFR3, ALDH1A1, NR0B1,ZP2 and SMOC1. Other significant miRNAs were represented by ga-miR-460b-5p, gga-miR-1552-5p, gga-miR-125b-5p, gga-miR-135a-5p, gga-miR-122-5p, gga-miR-29b-3p and ggga-miR-138-1-3p.4. Enrichment analyses using GO and KEGG databases highlighted the influence of the extracellular matrix (ECM), cell adhesion molecules (CAMs), TGF-β and calcium signalling pathways and the steroid synthesis pathway on follicular development.5. Additionally, the miRNA-mRNA interaction network pinpointed the regulatory roles of specific differentially expressed miRNAs (DE miRNAs), including gga-miR-1306-5p, gga-miR-133a-3p, gga-miR-133c-3p, gga-miR-214, gga-miR-214b-5p and gga-miR-34a-5p.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-14"},"PeriodicalIF":1.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207795","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 comparison of immersion-based and spray-based crate washing systems on the impact of Campylobacter spp. reduction. 基于浸泡和基于喷雾的板条箱洗涤系统对减少弯曲杆菌影响的比较。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-01 Epub Date: 2025-01-06 DOI: 10.1080/00071668.2024.2435013

M Van der Eycken, K Hertogs, S Willems, M Heyndrickx, G Rasschaert

{"title":"A comparison of immersion-based and spray-based crate washing systems on the impact of Campylobacter spp. reduction.","authors":"M Van der Eycken, K Hertogs, S Willems, M Heyndrickx, G Rasschaert","doi":"10.1080/00071668.2024.2435013","DOIUrl":"10.1080/00071668.2024.2435013","url":null,"abstract":"1.During transport of broilers from farms to slaughterhouses, the interior of crates may become contaminated with faeces. When these crates are not cleaned and disinfected adequately, they pose a potential risk for the dissemination of pathogens, including Campylobacter spp., between slaughterhouses and farms.2. The aim of the trial was to compare the efficacy of immersion-based crate washing systems with a spray-based washing system in reducing Campylobacter spp. Therefore, the crate washing systems in two slaughterhouses were sampled. In one of these two slaughterhouses, the immersion-based crate washing system was replaced by a new spray-based system which was sampled. Samples were collected from the slaughterhouse equipment, the crate washing system as well as from the crates both before and after cleaning and disinfection (C&D). All samples were screened for the presence of Campylobacter spp.; water and crate samples were used for enumeration. Molecular typing was performed to investigate the source and routes of contamination.3. In all cases, crates were contaminated with Campylobacter spp. prior to washing. However, only the spray-based system achieved a significant reduction after C&D Molecular typing revealed that the same strains were present on the crates after C&D as before cleaning. Additionally, crates could become contaminated by previously cleaned crates via wash water in the immersion-based crate washing system.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"358-366"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142930672","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

Impact of extended lairage periods on physio-metabolic status and meat quality in commercial broilers. 延长养期对商品肉鸡生理代谢状态和肉质的影响。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-01 Epub Date: 2024-12-02 DOI: 10.1080/00071668.2024.2430620

P M Bagade, A K Wankar, P M Kekan, S N Rindhe, K K Khose, P B Ghorpade, Manimaran S

{"title":"Impact of extended lairage periods on physio-metabolic status and meat quality in commercial broilers.","authors":"P M Bagade, A K Wankar, P M Kekan, S N Rindhe, K K Khose, P B Ghorpade, Manimaran S","doi":"10.1080/00071668.2024.2430620","DOIUrl":"10.1080/00071668.2024.2430620","url":null,"abstract":"1. This study investigated the impact of different lairage duration on physiology, metabolism and meat quality in commercial broilers.2. A total of sixty, one-d-old Vencobb broilers were reared until 42 d of age and subjected to five lairage treatments (T0-T5), with the control with no lairage and then each timepoint increasing by 2 h.3. Head, eye and feet temperature increased progressively (P˂0.05), from 21 to 42 d. During lairage, temperature for the head, eye and feet were significantly higher in birds held until T3-T4 (P˂0.05), than at T0-T2 and T5 treatments.4. Serum total protein, creatinine, lipase and TBARS showed no variation due to lairage (p > 0.05). Glucose levels were highest at T4 (p < 0.05) than at T1-T3 or T5 and serum albumin increased only at T4 as compared to T5 (p < 0.05). Higher levels for blood triglycerides were recorded for T0, T1 and T5 (p < 0.05), than at T2-T4 and total blood antioxidants were significantly higher at T1 (p < 0.05), than at T0 and T2-T5 treatments, respectively.5. There was no significant difference for meat pH, ERV and WHC (p > 0.05), while, higher tyrosine levels (p < 0.05) were noted for birds in T5 than for the rest of the lairage treatments (T0-T4). On the same trend, TBA concentration was highest for birds in T5, as compared to T4 (p < 0.05).6. In conclusion, lairage over eight hours for commercial broilers is not recommended, as there are drastic changes in physiology, metabolism and deterioration of meat, reducing meat quality.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"324-330"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142766392","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 the early incubation temperature on the muscle physiology, meat quality, bone strength and gait score in Ross broilers. 早期孵化温度对罗斯肉鸡肌肉生理机能、肉质、骨强度和步态评分的影响

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-01 Epub Date: 2024-11-18 DOI: 10.1080/00071668.2024.2419614

T Kettrukat, J S Petersen, E Grochowska, M Therkildsen

{"title":"Effects of the early incubation temperature on the muscle physiology, meat quality, bone strength and gait score in Ross broilers.","authors":"T Kettrukat, J S Petersen, E Grochowska, M Therkildsen","doi":"10.1080/00071668.2024.2419614","DOIUrl":"10.1080/00071668.2024.2419614","url":null,"abstract":"1. Modern broiler chickens are among the most efficient livestock in terms of resource requirements and production time. To maintain and improve production efficiency and meat quality and account for welfare problems, early interventions, such as incubation temperature, require investigation2. In this study, Ross 308 broiler eggs were incubated at either 36.5°C or 38.5°C on embryonic days (ED) 4-7. The control group eggs were incubated at a constant temperature of 37.5°C. Musculus pectoralis and musculus gastrocnemius samples were taken for the investigation of muscle physiology, and the tibia was sampled for bone strength analysis from chickens aged 35 and 36 d. In addition, meat quality was analysed and gait scoring was performed.3. The performance of chickens in the 36.5°C group was inferior to those in the other groups up to d 10 post-hatch, but compensatory growth was seen by d 35 of age. Meat quality was unaffected, but significant differences between sexes were observed. Males had lighter meat colour than females. Muscle glycogen and intramuscular fat were unaffected by the incubation temperature, but the muscularis pectoralis and gastrocnemius intramuscular fat contents were greater in males than in females, accompanied by the increased expression of enzymes involved in lipolysis. In the 38.5°C group, males had less bone elasticity than females, and the inverse was observed in the other groups. Gait scores were affected by sex but not incubation temperature.4. The results of this study showed a stronger effect of sex than incubation temperature on broiler muscle physiology, bone strength, performance and meat quality.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"401-412"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142646592","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

Influence of particle size and inclusion level of oat hulls on retention and passage in the anterior digestive tract of broilers. 燕麦壳的粒度和加入量对肉鸡前消化道滞留和通过的影响

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-01 Epub Date: 2024-11-25 DOI: 10.1080/00071668.2024.2426667

S Ghimire, K Itani, S Kaczmarek, A Smith, B Svihus

{"title":"Influence of particle size and inclusion level of oat hulls on retention and passage in the anterior digestive tract of broilers.","authors":"S Ghimire, K Itani, S Kaczmarek, A Smith, B Svihus","doi":"10.1080/00071668.2024.2426667","DOIUrl":"10.1080/00071668.2024.2426667","url":null,"abstract":"1. Six pelleted diets with different ratios of whole oats to dehulled oats, ground either finely (2 mm) or coarsely (6 mm), resulting in 0.05% (LOH), 6.5% (MOH) and 11.4% (HOH) OH inclusion, were fed to broilers to study gizzard functionality and its influence on passage of large oat hull (OH) particles. The hypothesis was that coarse OH would be selectively retained in gizzard for grinding, but higher levels would increasingly result in passage of unground OH.2. In experiment 1, gizzard and small intestinal contents were sampled from 78 birds at 28-29 d of age. Neutral detergent fibre (NDF) of gizzard contents was over three times higher than that of diets, indicating selective retention. An interaction effect of OH and screen size was seen for large particles (>1.6 mm) in the upper ileum, which was higher for MOH and HOH than LOH and only for coarse diets. This indicated that passage of unground coarse large particles from the gizzard increased when it exceeded a maximum retention level.3. In experiment 2, pre-weighed amount of HOH 2 mm and HOH 6 mm diets were fed to 80 birds for 2 h and were sampled on d 30 at 0, 2, 4, 8 and16 h to study OH degradation and flow. Contents were sampled from the crop, gizzard, small intestine, colon/cloaca and excreta. Unrecovered NDF in gastrointestinal tract plus excreta increased with more time and coarseness. An interaction effect between time and screen size was found for large particles in excreta, which was higher for 6 mm diets than 2 mm diets at 16 h.4. The presence of large OH particles in excreta challenged the previous assumption that particles are ground in the gizzard to a certain critical size before passing down further down the digestive tract. Some OH seemed to escape grinding in gizzard and this was higher for coarser particles.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"391-400"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142709316","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

Influence of LED light spectra and photoperiods on performance, bone characteristics and related genes expression in broiler breeders. LED光谱和光周期对肉种鸡生产性能、骨骼特性及相关基因表达的影响

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-01 Epub Date: 2024-12-02 DOI: 10.1080/00071668.2024.2425627

N Nasirzadeh, M J Zamiri, A Akhlaghi, S Ghovvati, S Kargar, J Amini

{"title":"Influence of LED light spectra and photoperiods on performance, bone characteristics and related genes expression in broiler breeders.","authors":"N Nasirzadeh, M J Zamiri, A Akhlaghi, S Ghovvati, S Kargar, J Amini","doi":"10.1080/00071668.2024.2425627","DOIUrl":"10.1080/00071668.2024.2425627","url":null,"abstract":"1. Lighting is a crucial environmental factor in poultry production. This study evaluated the effects of light-emitting diodes (LED) on performance and several bone characteristics, including bone mineralisation, morphometry, histology and selected gene expression in broiler breeders.2. A total of 800 one-d-old female broiler breeder chickens (Ross 308) were randomly allocated to one of 20 light-proof pens and reared under green (GL) or white (WL) LED light for two photophases (8 or 12 h) in a 2 × 2 factorial experiment and compared to a control group (incandescent lamp at 8 L:16D duration; CON). Weight gain, feed consumption and feed conversion ratio (FCR) were calculated. Femoral and tibial characteristics were measured.3. The LED colour affected feed intake during the rearing period, being higher for birds under white compared to green light. Tibial calcium (Ca) concentration in WL birds was lower than for green LED lighting regimens but not different from the CON group (p ≤ 0.05). Birds under 12 h lighting had greater tibia bone dry matter and trabecular separation (mm) than those in the 8 h groups. However, bone volume fraction and trabecular number per mm in 8 h birds were higher than in 12 h groups (p ≤ 0.01). There was greater expression of the osteocalcin gene under WL compared with CON. Osteopontin expression in WL8 was 4.63 times greater than in the CON group (p ≤ 0.05). The alkaline phosphatase gene expression in WL12 was higher than in the CON group (p ≤ 0.05).4. Exposure to white and green LED spectra enhanced bone gene expression and mineralisation, respectively, without adverse effects on bird performance. Thus, LED light may be beneficial to broiler breeder bone traits.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"315-323"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142766447","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

Are slow-growing broiler chickens actually better for animal welfare? Shining light on a poultry welfare concern using a farm-scale economic model. 生长缓慢的肉鸡真的更有利于动物福利吗？用农场规模的经济模式来关注家禽福利问题。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2025-06-01 Epub Date: 2025-01-06 DOI: 10.1080/00071668.2024.2432926

I Khire, R Ryba

{"title":"Are slow-growing broiler chickens actually better for animal welfare? Shining light on a poultry welfare concern using a farm-scale economic model.","authors":"I Khire, R Ryba","doi":"10.1080/00071668.2024.2432926","DOIUrl":"10.1080/00071668.2024.2432926","url":null,"abstract":"1. It remains unclear whether slow-growing broilers actually represent an overall animal welfare improvement - a major knowledge gap for policymakers and animal welfare NGOs. This paper addresses this knowledge gap by using an economic model to produce an all-things-considered estimate of the welfare effects of slow-growing genotypes. A quantitative end-point welfare metric that accounts for welfare challenges throughout the production cycle used the Pain-Track method from the Cumulative Pain Framework.2. Longer lifespans of slow-growing broilers (relative to fast-growing broilers) typically caused an increase in the time spent in low-intensity negative affective states. However, despite the additional broilers being farmed and their longer growth period, switching to slow-growing genotypes caused a decrease in higher-intensity negative affective states - a major win for welfare.3. These results can be used to alleviate consumer and producer concerns that any transition causes a welfare risk and provide an optimistic understanding of the overall welfare impact of transitioning to slow-growing broilers.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"290-298"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142930675","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