British Poultry Science最新文献

{"title":"Effects of feed particle size, calcium concentration and phytase supplementation on InsP₆ degradation in broiler chickens fed pelleted diets.","authors":"S Wolfrum, W Siegert, I Rubio-Cervantes, D Feuerstein, A Camarinha-Silva, M Rodehutscord","doi":"10.1080/00071668.2024.2412096","DOIUrl":"10.1080/00071668.2024.2412096","url":null,"abstract":"<p><p>1. The objective of the trial was to study the single and interactive effects of feed particle size in pelleted feed, dietary calcium (Ca) concentration and microbial phytase supplementation in broiler chickens. The studied traits were <i>myo</i>-inositol (1,2,3,4,5,6) hexakis (dihydrogen phosphate) (InsP₆) degradation, pre-caecal digestibility of phosphorus (P), Ca and amino acids (AA) and retention of P, Ca and nitrogen (N).2. Male Ross 308 broiler chickens were housed in metabolism units in groups of 10 and allocated to one of eight diets with seven pen replicates per diet. The 2 × 2 × 2-factorial arrangement included coarse and fine feed particle size (309 or 222 µm), low and high Ca concentration (4.9 and 7.2 g/kg) and without or with phytase supplementation (1,000 FTU/kg).3. Pre-caecal InsP₆ disappearance was higher with coarse than fine feed particle size when no phytase was added (54 vs. 48%) but not when phytase was added (74%; <i>p</i> = 0.046). High dietary Ca feeds decreased pre-caecal InsP₆ disappearance (67 to 59%) and P digestibility (65 to 55%; <i>p</i> < 0.001). Gizzard pH was lower with coarse than fine feed particle size and higher with high Ca than low Ca (<i>p</i> < 0.001). Pre-caecal digestibility of most AA was approximately 3.5%-points lower with high Ca without phytase compared to the other treatments (<i>p</i> ≤ 0.047). Coarse feed particle size caused higher pre-caecal AA digestibility than fine particle size (~2%-points; <i>p</i> ≤ 0.031). InsP₆ disappearance in the crop increased at high Ca concentration when phytase was added (22 vs. 37%; <i>p</i> = 0.011).4. Coarser feed particle size in pellets increased gastrointestinal InsP₆ degradation and nutrient digestibility, likely owing to effects on the gizzard functions. Additional Ca supply exerted antinutritive effects that was not compensated for by using coarser feed particles.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"245-255"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458548","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}

{"title":"Dietary stinging nettle (<i>Urtica dioica</i>) improves carotenoids content in laying hen egg yolk.","authors":"V R Pirgozliev, K Kljak, I M Whiting, S C Mansbridge, A G Atanasov, S B Enchev, M Tukša, S P Rose","doi":"10.1080/00071668.2024.2406335","DOIUrl":"10.1080/00071668.2024.2406335","url":null,"abstract":"<p><p>1. This study assessed the addition of dried stinging nettle (SN) leaves at 0%, 2.5% and 5.0% in feed on egg production, egg quality, chemical composition and antioxidant content in eggs from laying hens.2. Seventy-two Hy-Line Brown laying hens, housed in 36 enriched layer cages, were used in the study from 43 to 47 weeks of age. Feeding dry SN leaves did not affect (<i>p</i> > 0.05) egg production variables.3. Dietary SN inclusion linearly increased (<i>p</i> < 0.001) carotenoid content more than six-fold, in addition to yellowness and redness of the yolks at the maximum inclusion. Providing eggs from hens fed carotenoid enriched diets, <i>e.g</i>. SN, may be used to increase carotenoids in human diets.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"275-280"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142495554","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}

{"title":"Age-related changes in carcass composition, physicochemical properties, texture and microstructure of meat from White King pigeons.","authors":"K Włodarczyk, D Kokoszyński, J Żochowska-Kujawska, M Kotowicz, M Wegner, K Stęczny, H Arpášová, A Cebulska","doi":"10.1080/00071668.2024.2406363","DOIUrl":"10.1080/00071668.2024.2406363","url":null,"abstract":"<p><p>1. An experiment was conducted to explore the age-related changes in carcass composition, physicochemical properties, texture and microstructure of meat from White King pigeons. The study used 32 carcasses collected from White King pigeons (16 aged 4 weeks and 16 aged 180 weeks).2. The 180-week-old White King pigeons had a higher percentage of eviscerated carcass characteristics. The 4-week-old pigeons were characterised by higher percentage of skin with subcutaneous fat and carcass remainders. There were significant differences in chemical and physicochemical characteristics as well as in texture and microstructure parameters amongst White King pigeons of different ages.3. In conclusion, the study demonstrated that the age of White King pigeons has a considerable impact on carcass composition, physicochemical properties, meat texture and microstructure. Older pigeons had higher percentages of eviscerated carcass components, which may reflect maturation, while younger pigeons had greater proportions of fat and carcass remainders. These findings suggest that age-related changes should be considered when evaluating meat quality and composition, as each age group presented distinct characteristics.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"212-217"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142388228","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}

{"title":"<i>Ante-mortem</i> glutathione peroxidase 4 inhibition by RSL3 affects post-mortem meat quality in broiler chickens.","authors":"T Nakanishi, T Uchiyama, M Uchida, L Erickson, S Kawahara","doi":"10.1080/00071668.2024.2412167","DOIUrl":"10.1080/00071668.2024.2412167","url":null,"abstract":"<p><p>1. This study investigated the role of glutathione peroxidase 4 (GPX4), a key regulator of ferroptosis, a form of programmed cell death, in muscle biochemistry and meat quality, utilising broiler chickens whose <i>ante-mortem</i> GPX4 activity was inhibited pharmacologically.2. Male broilers were divided into two groups, each receiving <i>ante-mortem</i> administration of the GPX4 inhibitor, Ras-selective lethal 3 (RSL3), or a vehicle only. After slaughter, breast muscles were collected and stored for 48 h. The expressions of ferroptosis-related genes, glutathione levels, pH, colour and water-holding capacity were evaluated at multiple time points during the storage period.3. The RSL3 treatment decreased the expression of <i>GPX4</i> and ferritin heavy chain 1, which are negative regulators of ferroptosis, while it increased the expression of a ferroptosis accelerator, acyl-CoA synthetase long chain family member 4. The ratio of reduced to oxidised glutathione was significantly decreased in the RSL3 group. The RSL3 treatment decelerated post-mortem pH decline and colour changes, such as a decrease in L* and an increase in a* were observed in the RSL3 group. In addition, the RSL3 group showed increased levels of water-holding capacity.4. These findings suggested that <i>ante-mortem</i> GPX4 activity plays a role in determining meat quality, implying the possible involvement of ferroptosis in the mechanism by which skeletal muscle is converted after slaughter into meat that is eaten.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"218-226"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142495550","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}

{"title":"Assessment of two diet types in reduced-crude protein diets with or without phytase supplementation - implications on key phenotypic responses in 21-day-old broiler chickens.","authors":"O A Olukosi, H Philippi, S Veluri, B Kasireddy, A M Ajao, M Pilevar, I W Oluseyifunmi","doi":"10.1080/00071668.2024.2412136","DOIUrl":"10.1080/00071668.2024.2412136","url":null,"abstract":"<p><p>1. Two concurrent experiments were conducted to investigate the effect of using the crude protein (CP) value of supplemental amino acids (AA) in formulating reduced-crude protein (RCP) diets. The RCP diets formulated without accounting for CP values of supplemental AA (RCPN) or otherwise (RCPY) or a positive control (PC) diet were fed without (Experiment 1) or with (Experiment 2) phytase.2. Each experiment utilised 105 male broiler chicks. Birds were provided a common starter diet from d 0-7. On d 21, ileal digesta were collected from the distal half of the ileum. For mRNA expression analysis, tissues were collected from the mid-jejunum and the liver. Excreta grab samples were collected for analysis for N content.3. In Experiment 1, there was a stepwise decrease (<i>p</i> < 0.01) in weight gain and excreta N for birds receiving PC, RCPN and RCPY diets. The coefficients of ileal digestibility of His, Leu, Phe and Trp were greater (<i>p</i> < 0.05) in birds that received RCPY rather than the PC diets. The relative mRNA expression of CAT1 was greater (<i>p</i> < 0.05) for birds that received the PC diet.4. In Experiment 2, growth performance and excreta N were not different between the PC and RCPN diets, but weight gain, feed intake and excreta N were greater (<i>p</i> < 0.01) in birds receiving PC or RCPN diets. The coefficients of digestibility were greater (<i>p</i> < 0.01) in RCP than PC diets for Lys, Thr, Cys, Gly and Ser. The mRNA expression for S6kinase and PRKAβ2 was greater (<i>p</i> < 0.05) for birds fed RCPN compared to PC.5. In conclusion, accounting for the N content of supplemental AA during feed formulation for RCP diets will influence the effect of CP reduction on growth performance and ileal amino acid digestibility.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"256-265"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458547","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}

{"title":"Effect of grinding method and extent of pelleting of broiler diets on performance, feeding behaviour and digestive tract functionality.","authors":"S Dhakal, H Hetland, B Svihus","doi":"10.1080/00071668.2024.2405208","DOIUrl":"10.1080/00071668.2024.2405208","url":null,"abstract":"<p><p>1. An experiment was carried out to examine if a heterogeneous diet consisting of pellets and coarse cereal particles would result in a similar feed intake to pelleted-only diets. It also considered whether coarser particles entering the gizzard would encourage the development of the gizzard and thus improve digestive tract functionality. Maize and wheat were hammer milled through a 3 mm screen after coarse grinding using either one of the two screens with a novel pattern. Three pellet-only diets were produced based on three grinding sizes. Additionally, four diets were produced by separating coarse cereal particles from moderately coarse particles by sieving either once or twice, pelleting the remainder and finally mixing these into a complete heterogeneous diet.2. No difference in performance between birds fed the three pelleted-only diets was observed. However, heterogeneous diets resulted in a lower feed intake (FI) and weight gain (WG) than pelleted-only diets (<i>p</i> < 0.05). The dietary treatments neither affected the feed conversion ratio nor ileal digestibility of starch and protein (<i>p</i> > 0.05). As expected, feeding a heterogeneous diets increased (<i>p</i> < 0.05) the relative weight of the gizzard and its contents. Approximately 50% of the particles in the small intestine were between 0.15 mm and 0.36 mm in diameter, with more fine particles observed when the pelleted-only diets containing coarsely ground cereals were fed, confirming the capacity of the gizzard to finely grind feed.3. Sieving of the diet remaining in the feeder during 4 h of feeding two of the heterogeneous diets showed that the particles > 2.8 mm disappeared first (<i>p</i> < 0.05), showing the birds' preference for larger particles when offered heterogeneous diets. Although the birds were able to handle the coarse microstructure of the diets without any negative effects, the reduced performance in the case of heterogeneous diets might have been related to feed intake issues and particle selection, resulting in an imbalance in nutrient intake.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"227-237"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142342017","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}

{"title":"Consensus gene co-expression analysis across multiple intestinal tissues to identify key genes and pathways associated with abdominal fat deposition in broilers.","authors":"S Wang, Y Liu, S Liu, Z Qin, J Lu, R Zhang, H Yuan","doi":"10.1080/00071668.2024.2410367","DOIUrl":"10.1080/00071668.2024.2410367","url":null,"abstract":"<p><p>1. Abdominal fat deposition (AFD) is regulated by multiple intestinal tissues, and changes in the function of intestinal tissues are associated with AFD. Currently, integration of transcriptomic data across multiple intestinal tissues to explore excessive AFD has rarely been reported in broilers.2. In this study, a consensus gene co-expression network across the duodenum, jejunum, ileum and caecum of high- and low-abdominal fat broiler lines (HL and LL) was constructed using a publicly available transcriptomic data set. Combining the results of functional enrichment analyses and differential gene expression analyses, this investigated the genes and biological pathways across the four intestinal tissues that might influence AFD.3. In one expression module, <i>NDUFA5</i>, <i>NDUFS6</i>, <i>NDUFA4</i>, <i>NDUFS4</i>, <i>ATP5H</i>, <i>ATP5J</i> and <i>ATP5C1</i> were significantly enriched in the oxidative phosphorylation pathway, with <i>GPX2</i> and <i>GSR</i> significantly enriched in the glutathione metabolism pathway. These genes were significantly downregulated in the four intestinal tissues of the HL compared to LL chickens, which may be associated with AFD by increasing intestinal permeability.4. Lipid metabolism relevant genes were identified in other modules (<i>ALDH7A1</i>, <i>ACSBG1</i>, <i>THEM4</i> and <i>DECR1</i>), which may be linked to AFD through regulation of lipid metabolism. Interestingly, in the first module, 12 genes were significantly enriched in the proteasome pathway and significantly downregulated in the four intestinal tissues in HL birds compared to LL birds, indicating a link between the proteasome and AFD.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"155-165"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142495553","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}

{"title":"Effects of calcium pidolate on performance, carcass traits, bone biomechanical properties and mineralisation and jejunum histomorphology in broilers.","authors":"E T Gül","doi":"10.1080/00071668.2024.2410366","DOIUrl":"10.1080/00071668.2024.2410366","url":null,"abstract":"<p><p>1. The current study was conducted to determine the effect of dietary calcium pidolate (CalP) on performance, slaughtering characteristics, bone biomechanical properties, mineralisation and jejunum histomorphology in male broilers. A total of 200 one-day-old Ross 308 male chicks were randomly assigned to one of four treatments as five pen replicates, each containing 10 chicks. The basal diet without CalP was formulated to supply the nutritional needs of broilers and the treatment diets contained 0.30, 0.45 and 0.60 g/kg CalP, with limestone meeting the remaining calcium requirement.2. The addition of CalP had a quadratic effect on performance (P < 0.05) and the best performance was achieved in the group that included CalP at a dose of 0.45 g/kg but 0.60 g/kg level worsened performance. Supplementing with CalP linearly decreased carcass yield (P < 0.01) and relative breast weight (P ≤ 0.05) but the relative thigh weight increased quadratically (P < 0.05) and reached a maximum at 0.45 g/kg.3. Tibia shear force and stress linearly increased with the use of CalP in the diet (P < 0.05). Supplementation had a quadratic effect on tibial calcium (P < 0.01), reaching a maximum at 0.30 g/kg, although tibial phosphorus levels decreased linearly (P < 0.01).4. The effect of CalP on jejunum histomorphology fluctuated and, compared to the unsupplemented control group, the villus height/crypt depth ratio increased, while the other variables decreased (P < 0.05). Decrease in crypt depth with the addition of CalP was significant (P < 0.05).5. Using Ca-pidolate at a rate of 0.45 g/kg in broiler diets is sufficient to increase performance and tibia strength but 0.60 g/kg level negatively affected performance. In addition, the results of jejunum histomorphology were variable, but the crypt depth decreased with CalP levels and this is an important effect. However, further research is needed to detail the effect of CalP on broilers.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"238-244"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142495556","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}

{"title":"Pharmacokinetics of tolfenamic acid in ducks (<i>Anas platyrhynchos domestica</i>) after different administration routes.","authors":"D Durna Corum, O Corum, K Uney, E Turk, F Sakin, M Giorgi","doi":"10.1080/00071668.2024.2410365","DOIUrl":"10.1080/00071668.2024.2410365","url":null,"abstract":"<p><p>1. The objective of this research was to compare the pharmacokinetics and bioavailability of tolfenamic acid, analgesic, antipyretic and anti-inflammatory compound, after administration through different routes to Pekin ducks. The investigation was carried out over four time periods using a randomised cross-pharmacokinetic design.2. Tolfenamic acid was administered to ducks intravenously, intramuscularly, subcutaneously and orally at a dose of 2 mg/kg. Tolfenamic acid analysis was performed using HPLC-UV and pharmacokinetic data were conducted by non-compartmental analysis.3. The total clearance, volume of distribution at steady state and terminal elimination half-life after intravenous administration were 0.14 l/h/kg, 0.29 l/kg and 1.80 h, respectively. The peak plasma concentration and bioavailability for intramuscular, subcutaneous and oral administration were 4.59, 3.55 and 2.23 μg/ml and 93.62, 74.30 and 43.43%, respectively.4. Tolfenamic acid was absorbed rapidly, eliminated quickly and exhibited a small distribution volume in Pekin ducks. Pharmacokinetic parameters, including maximum concentration, area under the plasma concentration - time curve and bioavailability, were found to be different in ducks from other bird species.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"187-192"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142495557","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}

{"title":"The Gordon Memorial Lecture: genotype, phenotype, selection and more: improving the skeletal health of laying hens.","authors":"I C Dunn","doi":"10.1080/00071668.2025.2460054","DOIUrl":"10.1080/00071668.2025.2460054","url":null,"abstract":"<p><p>1. This review is a comprehensive exploration of the author's work in improving skeletal health in laying hens, focusing on the insights from genetics on nutritional, and environmental factors. It discusses the importance of the large number of disciplines that have contributed to the efforts to tackle bone quality in laying hens, particularly the keel bone.2. The transition from cages to non-cage environments has increased keel bone damage, despite improving overall skeletal health. It is a welfare paradox that improving the hen's environment has often been accompanied by greater skeletal damage.3. The role of genetics has been important in understanding and addressing bone health issues and will be a major factor in their improvement. This includes the identification of specific genes, like cystathionine-β-synthase, which has led to nutritional interventions using betaine supplementation to improve bone quality by targeting the one carbon pathway.4. The role of the timing of puberty and its genetic control is an additional factor in bone health, and new methods of measuring bone density in live birds are now important to monitor potential issues and deliver genetic solutions.5. The review emphasises a multi-faceted approach, combining genetics, nutrition, rearing practices, and housing design is required in order to improve skeletal health and enhance the welfare and sustainable performance in laying hens.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"139-146"},"PeriodicalIF":1.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11974920/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143572135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}