Animal Science Journal最新文献_第5页

Prediction of Enteric Methane-Related Traits From Body Weight and Milk Composition Traits, Including Ratios of De Novo, Mixed, and Preformed Fatty Acids in Holstein Cows. 从体重和乳成分性状（包括新生脂肪酸、混合脂肪酸和预形成脂肪酸比例）预测荷斯坦奶牛肠道甲烷相关性状

IF 1.6 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70219

Ryoki Tatebayashi, Akiko Nishiura, Fuminori Terada, Tomohisa Tomaru, Taketo Obitsu, Yoshinobu Uemoto, Tomoyuki Suzuki, Itoko Nonaka, Yuriko Saito, Osamu Sasaki

{"title":"Prediction of Enteric Methane-Related Traits From Body Weight and Milk Composition Traits, Including Ratios of De Novo, Mixed, and Preformed Fatty Acids in Holstein Cows.","authors":"Ryoki Tatebayashi, Akiko Nishiura, Fuminori Terada, Tomohisa Tomaru, Taketo Obitsu, Yoshinobu Uemoto, Tomoyuki Suzuki, Itoko Nonaka, Yuriko Saito, Osamu Sasaki","doi":"10.1111/asj.70219","DOIUrl":"10.1111/asj.70219","url":null,"abstract":"The aim of this study was to develop prediction equations for methane-related traits in Holstein cows using body weight (BW) and milk composition traits, including the proportions of de novo (DEN), mixed (MIX), and preformed (PRF) fatty acids in milk fat. A total of 358 measurements from 92 Holstein cows were used in regression analyses for methane emission (CH4, L/day), methane conversion factor (MCF), and the CH4:CO2 ratio. Independent variables included BW, energy-corrected milk (ECM), milk yield, milk protein percentage (PRO), milk fat percentage, lactose percentage, protein-to-fat ratio (PFR), DEN, MIX, and PRF. Four well-fitted equations were developed for CH4 and MCF. The best fitted equation was as follows: CH4 = -78.58 + 0.5632 × BW + 8.273 × ECM + 17.75 × PRO - 181.7 × PFR + 6.151 × DEN - 2.225 × MIX. When BW was excluded from the CH4 equation, prediction bias was observed across parities and lactation stages. This bias was reduced by developing parity-specific equations. These equations show moderate accuracy in validation. These findings demonstrate that methane-related traits can be effectively predicted using routinely collected animal and milk composition data, offering the potential for improved methane monitoring and mitigation strategies in dairy production.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70219"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13352104/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148417937","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}

引用次数: 0

Relationship Between Thermal Environment and Welfare Indicators of Laying Hens: A Canonical Correlation Approach. 热环境与蛋鸡福利指标的典型相关分析

IF 1.6 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70171

Carolina de Oliveira Marques de Souza, Silvana Cavalcante Bastos Leite, Maria Rogervânia Silva de Farias, Angela Maria de Vasconcelos, Luiz Paulo Fávero, Aérica Cirqueira Nazareno, Laura Bertolaso de Vecchi, Robson Mateus Freitas Silveira

{"title":"Relationship Between Thermal Environment and Welfare Indicators of Laying Hens: A Canonical Correlation Approach.","authors":"Carolina de Oliveira Marques de Souza, Silvana Cavalcante Bastos Leite, Maria Rogervânia Silva de Farias, Angela Maria de Vasconcelos, Luiz Paulo Fávero, Aérica Cirqueira Nazareno, Laura Bertolaso de Vecchi, Robson Mateus Freitas Silveira","doi":"10.1111/asj.70171","DOIUrl":"10.1111/asj.70171","url":null,"abstract":"Adaptation of laying hens to heat stress involves variables and multiple mechanisms, which are complex and interconnected by linear responses and interactions. Here, we compare the Pearson correlation method and canonical correlation to evaluate relationships between thermoregulatory, behavioral, and productive responses and thermal environment variables in laying hens reared in a semi-arid region of Brazil. A total of 270 lightweight Hy-Line White laying hens, 58 weeks old, with body weight of 1.60 ± 0.092 kg and egg production of 77.30% ± 3.62% were used. Simple Pearson correlation analysis showed fewer significant relationships than those identified by canonical correlation analysis. The results showed low to moderate canonical correlations (0.2576 ≤ rc ≤ 0.7449) between sets of indicators. Relationships between the thermal environment, thermoregulatory responses, and productive responses were significant (p ≤ 0.05), with the pair thermoregulatory responses × thermal environment presenting the highest correlation (rc = 0.7449; rc2 = 0.5548). Canonical correlation analysis is recommended to assess the behavior of complex relationships in laying hens. This multivariate approach provides a comprehensive understanding of linear and interactive relationships and captures interactions between climatic variables and thermoregulatory, behavioral, and productive responses.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70171"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12984014/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147442190","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}

引用次数: 0

Milk Components and Fatty Acid Composition as Predictors of Days Open in Early Lactation Holstein Cows. 乳成分和脂肪酸组成对泌乳早期荷斯坦奶牛开日数的预测作用。

IF 1.6 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70203

Noriaki Nagahaka, Masaya Matamura, Makoto Kondo

{"title":"Milk Components and Fatty Acid Composition as Predictors of Days Open in Early Lactation Holstein Cows.","authors":"Noriaki Nagahaka, Masaya Matamura, Makoto Kondo","doi":"10.1111/asj.70203","DOIUrl":"10.1111/asj.70203","url":null,"abstract":"This study investigated relationships between milk components, fatty acid (FA) composition, and days open in early lactation Holstein cows under heat stress and non-heat stress conditions, and evaluated predictive ability for reproductive performance. Data from 461 multiparous cows (1155 observations) across three farms were analyzed using dairy herd improvement (DHI) records from March 2020 to September 2024. Cows were classified by days open (≤ 150 vs. ≥151 days) and season, and analyzed with linear mixed models. Cows with shorter days open consistently exhibited higher milk protein, solids-not-fat (SNF), and de novo FA (C4:0-C14:0) within 60 days in milk (DIM), while those with longer days open showed higher fat-to-protein ratio and preformed FA (mainly ≥ C18). These trends were more pronounced under heat stress. Receiver operating characteristic analysis was performed, and the area under the curve (AUC) values showed that SNF (AUC = 0.699), milk protein (AUC = 0.676), and de novo FA (AUC = 0.670) at 31 to 60 DIM under heat stress demonstrated moderate but limited discriminative ability. Farm-level analysis indicated substantial inter-farm and within-farm variation, particularly under heat stress. Milk protein, SNF, and de novo FA may thus be potential biomarkers for prolonged days open detectable via routine DHI monitoring.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70203"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13278809/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148275634","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}

引用次数: 0

Varying Patterns of Breeding Use on Duck Farms in China and Implications for Microbial Resistance Strategies. 中国养鸭养殖利用模式的变化及其对微生物抗性策略的影响。

IF 1.6 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70160

Shuai Zhang, Min Han, Guannan Li, Ruiliang Zhang, Youxiang Diao, Dalin He, Yi Tang

{"title":"Varying Patterns of Breeding Use on Duck Farms in China and Implications for Microbial Resistance Strategies.","authors":"Shuai Zhang, Min Han, Guannan Li, Ruiliang Zhang, Youxiang Diao, Dalin He, Yi Tang","doi":"10.1111/asj.70160","DOIUrl":"10.1111/asj.70160","url":null,"abstract":"The study evaluated the effects of different breeding modes on production performance, microbial population, breeding costs, and economic efficiency of broiler ducks. The results showed that the bacterial detection rates of the cage-rearing system (CRS) ducks were all lower than the flat-rearing system (FRS) ducks. Two hundred forty-seven strains of E. coli, Staphylococcus, and Clostridium perfringens were isolated, and the detection rates were 62%, 16%, and 22%, respectively. The results of the drug sensitivity tests showed that all bacteria were highly resistant to florfenicol and neomycin. The results of drug resistance gene detection showed that E. coli carried a high positive rate of tetracycline resistance gene; this is also true for Staphylococcus. C. perfringens carried the highest positive rate of sulfonamide and aminoglycoside resistance genes. In addition, statistical analysis of the survival rate and production performance of seven batches of ducks showed that the survival rate of CRS was significantly higher than that of FRS, the age at slaughter was 4 days earlier, and the feed-to-meat ratio was reduced, resulting in lower costs and higher profits. It was concluded that compared with flat-breeding meat ducks, cage-breeding meat ducks have a high survival rate, low die-off rate, good production performance, low breeding costs, and high economic benefits.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70160"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147462594","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

Effect of Different Estrus Synchronization Protocols on Metabolic Profile, Progesterone Levels, and Reproductive Performance of Dairy Goats. 不同发情同步方案对奶山羊代谢谱、孕酮水平及繁殖性能的影响

IF 1.6 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70184

Ramya Sri Kolikapongu, Sharath Chandra Namani, Arshad Shaik, Ayesha Neha, Sai Chandan Chelkapally, Schauston Miller, Abdallah M Shahat, Mahipal Singh, Brou Kouakou, Adel R Moawad

{"title":"Effect of Different Estrus Synchronization Protocols on Metabolic Profile, Progesterone Levels, and Reproductive Performance of Dairy Goats.","authors":"Ramya Sri Kolikapongu, Sharath Chandra Namani, Arshad Shaik, Ayesha Neha, Sai Chandan Chelkapally, Schauston Miller, Abdallah M Shahat, Mahipal Singh, Brou Kouakou, Adel R Moawad","doi":"10.1111/asj.70184","DOIUrl":"10.1111/asj.70184","url":null,"abstract":"We evaluated the effects of two estrus synchronization protocols on blood metabolic profile, progesterone levels, and reproductive performance of dairy goats. Forty mature does were assigned into two groups: Protocol 1 (10 Alpine and 10 Saanen goats received two injections of PGF2α; 10 mg/goat on Days 1 and 11) and Protocol 2 (10 Alpine and 10 Saanen goats received 10 mg PGF2α on Day 1, GnRH 43 μg on Day 9, and 10 mg PGF2α/goat on Day 11). Estrus was monitored and natural mating was performed 24-36 h post-second PGF2α injection. Estrus response was higher for Protocol 1 (70%) than for Protocol 2 (60%). Alpine goats showed higher (p ≤ 0.05) estrus response than Saanen ones. Pregnancy rates tended to be higher for Protocol 1 (78.5%) than for Protocol 2 (66.7%). Progesterone concentration was higher (p ≤ 0.05) for Protocol 1 on Day 3 post-breeding (PB). Blood cholesterol and glucose levels were higher (p ≤ 0.05) for Protocol 2 on Days 12 and 21 BP, respectively. No differences were observed in kidding rates and kids' birth weights between the two protocols or between the breeds. In conclusion, PGF2α alone was more effective for estrus synchronization of dairy goats than PGF2α + GnRH.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70184"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147832389","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 Relationships Between Coronet Score and Type Traits Related to Hoof and Body Size in Holstein Cattle in Japan. 日本荷斯坦牛冠分与蹄、体大小型性状的遗传关系

IF 1.6 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70249

Yuriko Saito, Akiko Nishiura, Takeshi Yamazaki, Shigeki Yamaguchi, Toshimi Baba, Ryoki Tatebayashi, Osamu Sasaki, Masahiro Satoh

{"title":"Genetic Relationships Between Coronet Score and Type Traits Related to Hoof and Body Size in Holstein Cattle in Japan.","authors":"Yuriko Saito, Akiko Nishiura, Takeshi Yamazaki, Shigeki Yamaguchi, Toshimi Baba, Ryoki Tatebayashi, Osamu Sasaki, Masahiro Satoh","doi":"10.1111/asj.70249","DOIUrl":"https://doi.org/10.1111/asj.70249","url":null,"abstract":"Hoof disorders in dairy cows reduce productivity and increase culling risk, causing economic losses and animal welfare concerns. The coronet score is a 5-point indicator of hoof health (1 = healthy; 5 = severe) that may be useful in breeding programs. However, genetic relationships between coronet score and type traits remain unclear. We estimated genetic correlations between coronet score and type traits related to hoof and body size in Holstein dairy cows. Data from 24,174 first-lactation Holstein cows were analyzed. Coronet scores were obtained from test-day records, whereas type traits were evaluated once during first parity. Genetic correlations were estimated using two-trait animal models with Gibbs sampling. The genetic correlation between coronet score and feet and legs was -0.71, indicating that cows with higher feet and legs scores tended to have lower coronet scores. Positive genetic correlations ranging from 0.28 to 0.40 were observed between coronet score and body size traits, suggesting that larger cows tended to have higher coronet scores. These results indicate that coronet score is favorably associated with current breeding goals aimed at improving lifetime performance and controlling excessive body size. The coronet score may be a useful selection indicator for improving hoof health.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70249"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149134942","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 Music as Environmental Enrichment on Chronic Stress and Anxiety-Related Responses in Broiler Chickens. 音乐作为环境富集对肉鸡慢性应激和焦虑相关反应的影响

IF 1.6 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70254

Ana Carla Moreira Cardoso, Jaqueline Murbach Braz, Agnes Markiy Odakura, Caio Cesar Dos Ouros, Rodrigo Garófallo Garcia, Maria Fernanda de Castro Burbarelli, Marconi Italo Lourenço-Silva, Ibiara Correia de Lima Almeida-Paz, Cláudia Marie Komiyama, Fabiana Ribeiro Caldara

{"title":"Impact of Music as Environmental Enrichment on Chronic Stress and Anxiety-Related Responses in Broiler Chickens.","authors":"Ana Carla Moreira Cardoso, Jaqueline Murbach Braz, Agnes Markiy Odakura, Caio Cesar Dos Ouros, Rodrigo Garófallo Garcia, Maria Fernanda de Castro Burbarelli, Marconi Italo Lourenço-Silva, Ibiara Correia de Lima Almeida-Paz, Cláudia Marie Komiyama, Fabiana Ribeiro Caldara","doi":"10.1111/asj.70254","DOIUrl":"10.1111/asj.70254","url":null,"abstract":"This study evaluated the effects of classical music as auditory environmental enrichment on chronic stress and anxiety-related responses in broiler chickens. Two hundred Cobb 500 chicks were assigned to a control group (no enrichment) or an enriched group exposed to classical music for 6 h daily from 1 to 40 days of age. At 40 days, affective states were assessed using the attention bias test (ABT), while chronic stress was evaluated through feather corticosterone (CORT) concentrations. Music-exposed birds had significantly lower feather CORT concentrations than controls (p < 0.0001), indicating reduced chronic stress. No significant treatment effects were detected for ABT behavioral measures. However, music-exposed birds showed a numerically longer latency to take the first step (p = 0.055), although this difference did not reach statistical significance. Overall, these findings demonstrate that classical music enrichment can reduce physiological indicators of chronic stress in broilers, while evidence for effects on anxiety-related behavior remains inconclusive. The results suggest that auditory enrichment may help reduce chronic stress in broilers under the conditions evaluated and highlight the need for further replicated studies to clarify its effects on affective states and behavioral responses.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70254"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13671092/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190505","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}

引用次数: 0

Intake, Digestibility, Nitrogen Balance, Rumen, and Blood Parameters of Cattle Supplemented With Acacia mearnsii Extract. 添加金合欢提取物对牛采食量、消化率、氮平衡、瘤胃和血液指标的影响。

IF 1.2 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70195

Fernanda M Dos Santos, Leilson R Bezerra, Jusaline F Vieira, Polyana D R Marcelino, Analivia M Barbosa, Jose A Arce-Cordero, Mozart A Fonseca, Thadeu M Silva, Ronaldo L Oliveira

{"title":"Intake, Digestibility, Nitrogen Balance, Rumen, and Blood Parameters of Cattle Supplemented With Acacia mearnsii Extract.","authors":"Fernanda M Dos Santos, Leilson R Bezerra, Jusaline F Vieira, Polyana D R Marcelino, Analivia M Barbosa, Jose A Arce-Cordero, Mozart A Fonseca, Thadeu M Silva, Ronaldo L Oliveira","doi":"10.1111/asj.70195","DOIUrl":"10.1111/asj.70195","url":null,"abstract":"This study aimed to evaluate the effect of increasing levels of Acacia mearnsii extract as a source of condensed tannins on feed intake, nutrient digestibility, nitrogen (N) balance, rumen fermentation, and blood parameters of feedlot-finished cattle. Eight rumen-cannulated bulls were distributed in a replicated 4 × 4 square Latin design. The treatments consisted of a control diet with no extract inclusion (0 g/kg) and three diets with 10, 30, and 50 g/kg on a dry matter (DM) basis of A. mearnsii extract. Adding A. mearnsii extract to the diet linearly reduced (p < 0.05) the intake of DM, crude protein (CP), extract ether (EE), neutral detergent fiber (NDF), non-fiber carbohydrate (NFC), and total digestible nutrient (TDN); however, it linearly increased (p < 0.05) the digestibility of DM, NDF, and NFC. Including extract in the diet linearly reduced N-intake and N-urinary excretion and increased quadratically fecal N excretion (p < 0.05). Ruminal ammonia nitrogen (RAN) concentration and short-chain fatty acids were not affected (p > 0.05), but ruminal pH and serum proteins linearly decreased (p < 0.05) with the inclusion of extract. Including A. mearnsii extract in the diet of cattle at levels up to 50-g/kg DM reduces intake and increases the utilization of the feed and its nutrients.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70195"},"PeriodicalIF":1.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148148325","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

Quantifying Variation in the Abdominal Volume and Morphology of Dairy Heifers Using Three-Dimensional Imaging. 利用三维成像技术量化奶牛腹部体积和形态的变化。

IF 1.6 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70211

Shumpei Sakurai, Seongjin Oh, Tomohiro Mitani, Masahito Kawai, Koichiro Ueda

{"title":"Quantifying Variation in the Abdominal Volume and Morphology of Dairy Heifers Using Three-Dimensional Imaging.","authors":"Shumpei Sakurai, Seongjin Oh, Tomohiro Mitani, Masahito Kawai, Koichiro Ueda","doi":"10.1111/asj.70211","DOIUrl":"10.1111/asj.70211","url":null,"abstract":"Accurate evaluation of body growth is essential for heifer management, and three-dimensional (3D) imaging offers a promising approach for precise morphological assessment. This study aimed to quantify variations in the abdominal morphology of dairy heifers using 3D imaging and to evaluate the relationship between abdominal volume and body weight. Twenty-seven records from 19 Holstein heifers aged 3-18 months were imaged using a three-camera 3D system. The abdomen was subdivided into 12 anatomical subregions to assess regional width variations. Age-related changes were evaluated using linear regression models, and age-adjusted residuals from the models were analyzed using principal component analysis (PCA) to characterize morphological differences. Abdominal volume increased linearly with age and was strongly associated with body weight (R2 = 0.96). Despite similar abdominal volumes, substantial variation in regional morphology was observed. PCA of the age-adjusted residuals indicated that overall abdominal width, proportional differences between cranial and caudal regions, and dorsoventral distribution patterns were the primary contributors to morphological variations. These findings demonstrate that 3D-derived abdominal volume strongly reflects body weight in growing dairy heifers, while regional morphological analysis reveals pronounced animal-level variations, highlighting the potential of 3D imaging for characterizing developmental differences in dairy heifers.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70211"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148306621","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

Effect of 25-Hydroxyvitamin D₃ on Vitamin D and Immunoglobulin G Status, Performance, and Health of Periparturient Cows and Their Calves. 25-羟基维生素D3对围产期奶牛和犊牛维生素D和免疫球蛋白G水平、生产性能和健康的影响

IF 1.6 3区农林科学

Animal Science Journal Pub Date : 2026-01-01 DOI: 10.1111/asj.70207

Zihao Wang, Jianing Zhang, Tianjin Zhang, Yanli Chen, Hongwei Zhang, Yinghao Zhou, Jianguo Li, Yanxia Gao, Xin Li, Hongjian Xu

{"title":"Effect of 25-Hydroxyvitamin D3 on Vitamin D and Immunoglobulin G Status, Performance, and Health of Periparturient Cows and Their Calves.","authors":"Zihao Wang, Jianing Zhang, Tianjin Zhang, Yanli Chen, Hongwei Zhang, Yinghao Zhou, Jianguo Li, Yanxia Gao, Xin Li, Hongjian Xu","doi":"10.1111/asj.70207","DOIUrl":"https://doi.org/10.1111/asj.70207","url":null,"abstract":"The objectives of this study were to explore the effects of 25-hydroxyvitamin D3 on (1) colostrum yield and compositions, 25-hydroxyvitamin D3, minerals, and health of periparturient cows and (2) 25-hydroxyvitamin D3 and minerals status, growth performance, and health of their calves. Forty multiparous dry cows were assigned to either vitamin D3 group or 25-hydroxyvitamin D3 group. After calving, all their calves received colostrum from their own dams; calves were respectively assigned to one of four treatments: (1) calves from D-VD group were fed vitamin D3; (2) calves from D-VD group were fed 25-hydroxyvitamin D3; (3) calves from D-25D group were fed vitamin D3; (4) calves from D-25D group were fed 25-hydroxyvitamin D3. Feeding 25-hydroxyvitamin D3 significantly increased (p < 0.05) 25-hydroxyvitamin D3, calcium and phosphorus in serum and colostrum, serum antioxidant capacity and immunoglobulin G (IgG) of periparturient cows, and significantly increased (p < 0.05) serum 25-hydroxyvitamin D3, calcium, and phosphorus in calves at birth. Feeding 25-hydroxyvitamin D3 calves improved (p < 0.05) weaning weight, skeletal growth, and average daily gain together with increased antioxidant capacity and IgG. In conclusion, supplementing 25-hydroxyvitamin D3 to periparturient cows and their calves improved colostrum and health of cows and growth and health of their calves.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"97 1","pages":"e70207"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148359042","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