Tropical animal health and production最新文献_第3页

Incorporation of Azadirachta indica kernel in the diet of guinea pigs: effects on digestibility and caecal health. 豚鼠日粮中加入印楝仁：对消化率和盲肠健康的影响。

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-21 DOI: 10.1007/s11250-025-04476-7

Gina France Djoumessi Tobou, Laurette Blandine Mezajouck Kenfack, Emile Miégoué, David Wauffo Fokom, Hervé Mubé Kuitche, Zambou Dongmo Delmas Kesnel, Fernand Tendonkeng, Tchiegang Clerge, Jean-Luc Hornick

{"title":"Incorporation of Azadirachta indica kernel in the diet of guinea pigs: effects on digestibility and caecal health.","authors":"Gina France Djoumessi Tobou, Laurette Blandine Mezajouck Kenfack, Emile Miégoué, David Wauffo Fokom, Hervé Mubé Kuitche, Zambou Dongmo Delmas Kesnel, Fernand Tendonkeng, Tchiegang Clerge, Jean-Luc Hornick","doi":"10.1007/s11250-025-04476-7","DOIUrl":"10.1007/s11250-025-04476-7","url":null,"abstract":"The objective of the present study was to assess the effects of neem (Azadirachta indica) kernel powder supplementation on the digestibility of feed chemical components and the composition of caecal microbiota in guinea pig. One hundred and thirty guinea pigs were randomly assigned to four groups. For 27 days, the animals were fed once daily with either a standard control diet (complete concentrate) or a concentrated mixture with 2.5, 5 or 7.5% (w/w) neem kernel powder. The results showed a significant increase in feed intake and digestibility with the rate of kernel incorporation. In the caeca content, the log count of lactic acid bacteria and Clostridium butyricum increased quadratically (P < 0.001) with the supplementation level whereas Escherichia coli count decreased. The results suggest that neem kernel powder could be used as a phytogenic supplement for guinea pigs, enhancing both nutrient digestibility and gut microbiota quality.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"280"},"PeriodicalIF":1.7,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12181132/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337070","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

Seasonal effects of Searsia lancea, Celtis africana and concentrate supplementation on weight changes, serum and urine metabolites in South African Nguni goats. 刺海草、非洲凯尔特人和精料添加对南非恩古尼山羊体重变化、血清和尿液代谢物的季节性影响。

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-20 DOI: 10.1007/s11250-025-04523-3

France Phiri, Arnold Tapera Kanengoni

{"title":"Seasonal effects of Searsia lancea, Celtis africana and concentrate supplementation on weight changes, serum and urine metabolites in South African Nguni goats.","authors":"France Phiri, Arnold Tapera Kanengoni","doi":"10.1007/s11250-025-04523-3","DOIUrl":"10.1007/s11250-025-04523-3","url":null,"abstract":"This study evaluated the seasonal impact of different dietary supplements on male Nguni goats' health, focusing on serum and urine metabolite concentrations. Twenty male Nguni goats (15 ± 1.6 kg) were arranged in a 2 × 4 (season × diet) factorial design using a randomized complete block arrangement with five goats per treatment. All goats received a basal diet of Eragrostis hay supplemented with one of four treatments: T1) Searsia lancea (SLA), T2) Celtis africana (CAF), T3) a 1:1 combination of SLA and CAF (LAC), or T4) a control diet with concentrate. During the wet season, goats fed CAF or SLA showed higher average daily gain (ADG) and average dry matter intake (ADMI) than those on LAC. Significant season × diet interactions were observed for urobilinogen (URO), urine bilirubin (UBIL), urine protein (UPRO), and urine calcium (UCAL). Goats on the control diet exhibited higher URO and UBIL values (P < 0.05) than those on browse forages during both seasons. In the wet season, goats on SLA had higher UPRO (P < 0.05) than those on LAC. Across seasons, goats on CAF showed higher blood serum gamma-glutamyltransferase (GGT) than those on control or LAC diets (P < 0.05). Diet significantly affected (P < 0.05) serum GGT, albumin, alkaline phosphatase, urea nitrogen, creatinine, cholesterol, glucose, and inorganic phosphate levels regardless of season. Urinalysis revealed diet-related kidney dysfunction and imbalanced serum metabolites. The study concluded that CAF and SLA supplementation negatively affected renal and hepatic health in goats, warranting further investigation.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"279"},"PeriodicalIF":1.7,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12178964/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144333897","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

Prevalence and risk factors for bovine brucellosis in the state of Pará, Amazon region of Brazil. 巴西亚马逊地区帕尔<e:1>州牛布鲁氏菌病的流行和危险因素

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-18 DOI: 10.1007/s11250-025-04530-4

José Soares Ferreira Neto, Jefferson Pinto Oliveira, Ana Paula Vilhena Beckman Pinho, Washington Luiz Assunção Pereira, Ricardo Augusto Dias, José Henrique Hidebrand Grisi Filho, Vitor Salvador Picão Gonçalves, Marcos Bryan Heinemann, Marcos Amaku, Evelise Oliveira Telles, Bruno Fontana Soares Ferreira, Fernando Ferreira

{"title":"Prevalence and risk factors for bovine brucellosis in the state of Pará, Amazon region of Brazil.","authors":"José Soares Ferreira Neto, Jefferson Pinto Oliveira, Ana Paula Vilhena Beckman Pinho, Washington Luiz Assunção Pereira, Ricardo Augusto Dias, José Henrique Hidebrand Grisi Filho, Vitor Salvador Picão Gonçalves, Marcos Bryan Heinemann, Marcos Amaku, Evelise Oliveira Telles, Bruno Fontana Soares Ferreira, Fernando Ferreira","doi":"10.1007/s11250-025-04530-4","DOIUrl":"https://doi.org/10.1007/s11250-025-04530-4","url":null,"abstract":"Bovine brucellosis is an endemic zoonosis in Brazil and the target of a national program for its control and eradication. A sectional study was carried out in Pará to define the best strategies for combating the disease. The state was divided into 3 regions; in each, a random sample of farms was drawn; within each property, blood was collected from a pre-established number of animals to characterize the property as brucellosis infected or free. The animals were screened using the Buffered Acidified Antigen test, followed by retesting of positives using the Complement Fixation test. A total of 9170 animals from 976 farms were tested. The prevalence of infected farms and seropositive animals for the state were 25.7% [CI 95%: 22.9-29.0] and 5.6% [CI 95%: 4.1-8.0], with heterogeneities among regions. Within regions, there was no difference between the prevalence of infected farms for dairy, beef, or mixed ones. The introduction of animals was identified as a risk factor for the disease (OR = 1.38 [CI 95%: 1.01-1.89]). To mitigate the risk of exposure of animals and humans to brucellosis, the state should implement an efficient vaccination program with B19 and RB51 vaccines, seeking to reduce the prevalence of infected farms and animals at low cost. Additionally, to reduce the speed at which the disease spreads, educational actions should be implemented so that cattle and buffalo farmers test animals for brucellosis before introducing them onto their farms.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"278"},"PeriodicalIF":1.7,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318030","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

Re-visiting genetic background of some native Turkish sheep populations: bottleneck and migration. 重新考察一些土着土耳其羊种群的遗传背景：瓶颈和迁移。

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-17 DOI: 10.1007/s11250-025-04520-6

Bahar Argun Karsli, Eymen Demir, Umit Bilginer, Murat Soner Balcioğlu, Taki Karsli

{"title":"Re-visiting genetic background of some native Turkish sheep populations: bottleneck and migration.","authors":"Bahar Argun Karsli, Eymen Demir, Umit Bilginer, Murat Soner Balcioğlu, Taki Karsli","doi":"10.1007/s11250-025-04520-6","DOIUrl":"10.1007/s11250-025-04520-6","url":null,"abstract":"This study aimed to investigate genetic bottleneck effects and migration events among four native Turkish sheep breeds, namely Güney Karaman (GKR), Karakaş (KRK), Kangal (KNG), and Norduz (NRD). After genotyping a total of 120 animals with 28 highly polymorphic microsatellite loci, the genetic bottleneck was assessed by the Wilcoxon test under different mutation models, while population splits and migration events were investigated by the TreeMix algorithm. Wilcoxon sign rank test under the two-phased mutation model (TPM) and the mode-shift indicator based on the distribution of allele frequencies evidenced a lack of genetic bottleneck in four Anatolian sheep breeds. This finding implies that the studied sheep breeds have maintained their effective population size in the recent past. Similarly, the estimated values of effective population size were higher than the number of sampled animals, indicating that they were descendants of ancestral populations with higher sample sizes. The TreeMix algorithm revealed that the NRD was genetically distinct from the other breeds, while there was migration from NRD to KRK and GKR with a rate of 0.0096. The highest migration rate (0.0176) was detected from the KNG to the GKR breed. The results of this study are expected to assist breeders in taking necessary precautions for sustainable production in the future and to facilitate ongoing conservation programs. Indeed, breeders are encouraged to utilize both microsatellites and high-throughput genomic tools such as SNP arrays and next-generation sequencing technologies to foresee the trend in effective population size and genetic bottleneck effects in local sheep populations. Besides, geographic isolation and pure breeding of the NRD breed should be considered in conservation programs to eliminate inbreeding depression and genetic bottleneck in the future.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"273"},"PeriodicalIF":1.7,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12170704/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144310494","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

Transcriptomic analysis to identify differentially expressed genes of abdominal fat (AF) and breast muscle (BM) tissues based on RNA-seq in Zhijin white goose. 基于RNA-seq的织金白鹅腹部脂肪（AF）和乳房肌肉（BM）组织差异表达基因的转录组学分析

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-17 DOI: 10.1007/s11250-025-04524-2

Zhonglong Zhao, Yong Zhang, Hong Yang, Zhiwei Wang, Zhaobi Ai, Runqian Yang, Tiansong Wang, Li Ye, Chang Shu

{"title":"Transcriptomic analysis to identify differentially expressed genes of abdominal fat (AF) and breast muscle (BM) tissues based on RNA-seq in Zhijin white goose.","authors":"Zhonglong Zhao, Yong Zhang, Hong Yang, Zhiwei Wang, Zhaobi Ai, Runqian Yang, Tiansong Wang, Li Ye, Chang Shu","doi":"10.1007/s11250-025-04524-2","DOIUrl":"https://doi.org/10.1007/s11250-025-04524-2","url":null,"abstract":"Adipose tissue deposition patterns in poultry significantly influence meat quality and production efficiency. However, the molecular mechanisms regulating differential fat accumulation between adipose and muscle tissues remain poorly understood in waterfowl. To evaluate and compare the underlying molecular processes of fat accumulation in Zhijin white geese abdominal fat (AF) and breast muscle (BM). The differential gene expression profiles in the AF and BM tissues were conducted by using RNA-seq. Six male Zhijin white geese, all 180 days old and of equivalent body weight, were selected for collecting AF and BM tissue samples. After RNA-seq, Kyoto Encyclopedia of Genes and Genomes (KEGG) signaling pathway enrichment analysis was done to identify differentially expressed genes (DEGs) associated with adipose tissue deposition and lipid metabolism. Randomly selected 7 DEGs for real-time fluorescence quantitative PCR (qRT-PCR) validation in order to confirm the accuracy of the sequencing data. The results showed that there were 5969 DEGs in the AF and BM tissues of Zhijin white geese, of which 2860 were upregulated and 3109 were downregulated. The Gene Ontology (GO) functional annotation analysis demonstrated that DEGs were primarily implicated in lipid localization, phosphorus metabolic processes, catalytic activity, and other pathways associated with lipid metabolism. The citrate cycle (TCA cycle), pentose phosphate pathway, and glycolysis/gluconeogenesis were identified as KEGG pathways with significant enrichment. Transcriptome profiling and bioinformatic analysis of the AF and BM tissues revealed that the genes ALDOA, PDHA1, PGM1, ALDOC, PFKL, PDHX, PRPS1, SDHA and GAPDH were involved in lipid metabolism. These genes may play a crucial role in controlling fat deposition in AF and BM tissues of Zhijin white goose.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"274"},"PeriodicalIF":1.7,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144310495","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

Mixed cereal silage as a forage complement to Kikuyu grass grazing for small-scale dairy systems in the dry season. 混合谷物青贮作为一种饲料补充基库尤草放牧小规模乳品系统在旱季。

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-17 DOI: 10.1007/s11250-025-04500-w

Sirley Carrillo-Hernández, José Velarde-Guillén, Felipe López-González, Carlos Manuel Arriaga-Jordán

{"title":"Mixed cereal silage as a forage complement to Kikuyu grass grazing for small-scale dairy systems in the dry season.","authors":"Sirley Carrillo-Hernández, José Velarde-Guillén, Felipe López-González, Carlos Manuel Arriaga-Jordán","doi":"10.1007/s11250-025-04500-w","DOIUrl":"https://doi.org/10.1007/s11250-025-04500-w","url":null,"abstract":"Small scale dairy systems (SSDS) require feeding alternatives that increase their productivity with low environmental impact and economically viable. The objective of this work was to compare maize silage (T1) with silages from small-grain cereal mixtures (SGCM): rye plus barley (T2) and rye plus triticale (T3) as a complement to grazing Kikuyu grass (Cenchrus clandestinus) in the dry season. Nine mid lactation Holstein cows 500 ± 54.8 kg live weight (LW), 160 ± 74.6 days in milk and daily milk yield (MY) of 13.6 ± 3.37 kg were evaluated under a repeated 3 × 3 Latin square design with 12 day periods. The agronomic variables of the pasture, the productive response of the animals, the composition of feeds and estimated methane emissions were considered. T3 presented higher crude protein (CP) and neutral detergent fibre (NDF) contents (P < 0.05) and T1 had higher in vitro dry matter digestibility (IVDMD) and estimated metabolizable energy (eME) content (P < 0.05). Gross energy lost as methane was less with maize silage (P < 0.05). There were no differences (P > 0.05) in animal variables, total matter intake and methane emissions between treatments. The inclusion of silage from SGCM can be considered a feasible alternative to supplement grazing of cows in advanced lactation for SSDS of the central Mexican highlands during the dry season.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"277"},"PeriodicalIF":1.7,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318029","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

Evaluation of strategies to maximize fixed-time artificial insemination efficiency in Bos taurus indicus ("Nellored") females in Brazilian savannah environment by a real-life study. 在巴西大草原环境下对母牛（“Nellored”）雌性进行定时人工授精效率最大化策略的评价

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-17 DOI: 10.1007/s11250-025-04526-0

Jéssica Soares do Carmo, Aline Gomes da Silva, Luiz Carlos Louzada Ferreira, Luana Gomes da Silva, Marcelo Vedovatto, Fabiana de Andrade Melo Sterza, Aldair Félix da Silva, Rafael Batista Trannin, Jarbas Miguel da Silva Júnior, Luís Carlos Vinhas Ítavo, Henrique Jorge Fernandes

{"title":"Evaluation of strategies to maximize fixed-time artificial insemination efficiency in Bos taurus indicus (\"Nellored\") females in Brazilian savannah environment by a real-life study.","authors":"Jéssica Soares do Carmo, Aline Gomes da Silva, Luiz Carlos Louzada Ferreira, Luana Gomes da Silva, Marcelo Vedovatto, Fabiana de Andrade Melo Sterza, Aldair Félix da Silva, Rafael Batista Trannin, Jarbas Miguel da Silva Júnior, Luís Carlos Vinhas Ítavo, Henrique Jorge Fernandes","doi":"10.1007/s11250-025-04526-0","DOIUrl":"https://doi.org/10.1007/s11250-025-04526-0","url":null,"abstract":"This study aimed to identify factors and technologies that could enhance the pregnancy rate of \"Nellored\" females by evaluating the animal category, number of progesterone-releasing intravaginal device (DP4) uses and day of its removal, equine chorionic gonadotropin (eCG) dosage, time of fixed-time artificial insemination (FTAI), melengestrol acetate (MGA®) supplementation (before FTAI in heifers and after artificial insemination in cows), vaccination against reproductive diseases, body condition score (BCS, on a 1-5 scale), month of last calving before FTAI, and estrus expression intensity. Data from 15,618 FTAI procedures conducted across three breeding seasons (October to February of 2016/2017, 2017/2018, and 2018/2019), were evaluated. Multiparous cows showed higher pregnancy rates (45%), compared with primiparous cows (39%) and heifers (29%) (p < 0.05). Pregnancy rates decreased with lower estrus expression scores (51% for score 3, 36% for score 2 and 27% for score 1). The month of last calving before FTAI, period of the day when FTAI was performed, DP4 removal day and vaccination against reproductive diseases did not affect pregnancy rates (p > 0.05). MGA® supplementation before FTAI increased pregnancy rates in heifers from 19 to 34% (p < 0.05). The use of DP4 affected pregnancy rates (p < 0.05); however, its reuse did not have a negative impact. Higher pregnancy rates for FTAI protocols were observed in multiparous cows, animals with high estrus intensity, and a BCS of 2.5 to 3.0. Administering at least 200 IU eCG and supplementing heifers with MGA® through 26th to 13th days before FTAI is recommended.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"276"},"PeriodicalIF":1.7,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318028","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

Using complex diets post-weaning improves piglet performance and financial outcomes. 断奶后使用复合日粮可提高仔猪生产性能和经济效益。

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-17 DOI: 10.1007/s11250-025-04519-z

Heng Li Kao Junior, Laya Kannan Silva Alves, Bruno Braga Carnino, Fernanda Mariane Dos Santos, Ana Clara Rodrigues de Oliveira, Nádia de Almeida Ciriaco Gomes, Rafaella Fernandes Carnevale, Bruno Bracco Donatelli Muro, Monique Danielle Pairis-Garcia, Allan Paul Schinckel, Cesar Augusto Pospissil Garbossa

{"title":"Using complex diets post-weaning improves piglet performance and financial outcomes.","authors":"Heng Li Kao Junior, Laya Kannan Silva Alves, Bruno Braga Carnino, Fernanda Mariane Dos Santos, Ana Clara Rodrigues de Oliveira, Nádia de Almeida Ciriaco Gomes, Rafaella Fernandes Carnevale, Bruno Bracco Donatelli Muro, Monique Danielle Pairis-Garcia, Allan Paul Schinckel, Cesar Augusto Pospissil Garbossa","doi":"10.1007/s11250-025-04519-z","DOIUrl":"https://doi.org/10.1007/s11250-025-04519-z","url":null,"abstract":"This study evaluates the effects of complex versus simple diets on post-weaning performance, feeding behavior, and economic outcomes in piglets during the nursery phase. A total of 192 piglets (21 days old, 5.45 ± 0.95 kg) were assigned to either a simple or a complex diet in a randomized block design. The trial lasted 42 days and included pre-starter 1 (days 0-7), pre-starter 2 (days 8-28), and starter (days 29-42) phases. Piglets fed the complex diet demonstrated significantly better performance across all phases. In the pre-starter 1 phase, they had greater body weight (7.73%, P = 0.001), average daily gain (47.97%, P = 0.001), and improved feed conversion ratio (22.09% better, P = 0.001). Similar trends were observed in the pre-starter 2 and starter phases. Cumulatively, complex diet-fed piglets achieved 15.20% greater average daily gain (P < 0.0001), 6.99% higher average daily feed intake (P = 0.039), and 7.00% better feed conversion ratio (P < 0.0001). Complex diets also improved fecal consistency during the pre-starter 2 phase, with a higher frequency of firm feces compared to the simple diet group (19.24%, P = 0.006). Economic analysis revealed higher feed costs (18.42%, P < 0.0001), but greater total revenue (11.22%, P < 0.0001) and profitability (gross margin + 12.58%, P = 0.002) for complex-diet groups. Behavioral observations indicated longer eating times for complex diet-fed piglets during the first week post-weaning (59.80%, P = 0.0001). Overall, complex diets enhanced growth, feed efficiency and economic returns, making them a strategic option for improving post-weaning piglet performance.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"275"},"PeriodicalIF":1.7,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318031","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 late gestation heat stress in Buffalo heifers on postnatal growth, thermoregulatory, and suckling behavior responses of their newborn calves under subtropical environment. 亚热带环境下妊娠后期热应激对水牛犊牛出生后生长、体温调节和哺乳行为反应的影响

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-16 DOI: 10.1007/s11250-025-04514-4

Amr A Gabr

{"title":"Effects of late gestation heat stress in Buffalo heifers on postnatal growth, thermoregulatory, and suckling behavior responses of their newborn calves under subtropical environment.","authors":"Amr A Gabr","doi":"10.1007/s11250-025-04514-4","DOIUrl":"10.1007/s11250-025-04514-4","url":null,"abstract":"This study aimed to evaluate various growth, physiological, and suckling behavioral parameters of calves born to nulliparous buffalo heifers exposed to summer heat stress (HT, provided only shade, n = 12) or winter coldness (CL, n = 12) during the final 60 days of gestation. Calves were individually housed and were monitored from birth until 6 days of age. Rectal temperature, pulse rate, and respiratory rate were measured, and heat tolerance and adaptability indices were calculated. Suckling responses, suckling durations, and milk drinking speeds were also recorded. HT calves had lighter birth weights, with approximately 1.26 kg and 1.06 kg differences for male and female calves, respectively. They gained less weight from birth to 6 days, with a difference of 0.12 kg/d for males and 0.11 kg/d for females and weighed about 1.9 kg less at 6 days old. HT calves exhibited elevated rectal temperatures, respiration rates, and pulse rates, with increases of approximately 0.7 °C, 27 breaths/min, and 20.3 beats/min, respectively, compared to CL calves. Female calves were more susceptible to heat stress than males and exhibited lower heat tolerance and adaptability. HT calves exhibited a shorter total suckling duration immediately after birth compared to CL calves by about 55.3% and demonstrated faster milk drinking speeds by about 44%. Only HT female calves exhibited slower milk drinking speeds compared to HT males, with a reduction of about 18.7%. In-utero heat stress during late gestation had negative immediate and prolonged effects on postnatal performance and suckling behavior in buffalo calves, particularly in female calves.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"270"},"PeriodicalIF":1.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12167719/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144302940","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

Optimizing estrus synchronization in tropical hair sheep: ovarian responses and corpus luteum function following prostaglandin or progesterone-based treatments. 优化热带毛羊的发情同步：前列腺素或黄体酮治疗后卵巢反应和黄体功能。

IF 1.7 3区农林科学

Tropical animal health and production Pub Date : 2025-06-16 DOI: 10.1007/s11250-025-04527-z

Marcelo H Ratto, Alexandra Reyes-Delgado, Ximena Valderrama, Don R Bergfelt, Mauricio Silva, Aspinas Chapwanya, Rodolfo Ungerfeld

{"title":"Optimizing estrus synchronization in tropical hair sheep: ovarian responses and corpus luteum function following prostaglandin or progesterone-based treatments.","authors":"Marcelo H Ratto, Alexandra Reyes-Delgado, Ximena Valderrama, Don R Bergfelt, Mauricio Silva, Aspinas Chapwanya, Rodolfo Ungerfeld","doi":"10.1007/s11250-025-04527-z","DOIUrl":"https://doi.org/10.1007/s11250-025-04527-z","url":null,"abstract":"This study evaluated the ovarian responses and corpus luteum (CL) functionality in Barbados Blackbelly × White Virgin Island crossbred hair sheep subjected to two estrous synchronization protocols in a tropical grazing environment. A total of 40 non-lactating ewes, between 2 and 4 years of age, were randomly assigned to one of two treatment groups. The CIDR + PG group (n = 20) received a 7-day intravaginal CIDR device containing 0.3 g of progesterone, followed by an intramuscular injection of 10 mg dinoprost (PG analogue) upon removal of the device. Conversely, the double PG group (n = 20) received two intramuscular injections of 10 mg dinoprost, spaced 10 days apart. Ovarian structures were monitored via transrectal ultrasonography over a 21-day period, and blood samples were collected periodically to determine plasma progesterone levels. The proportion of ewes that ovulated was comparable between groups: 80% (16/20) in CIDR + PG and 90% (18/20) in the double PG group. The average interval from treatment to ovulation, inter-ovulatory interval, and preovulatory follicle size did not differ between the groups. Notably, the CL area was significantly larger in the CIDR + PG group (p = 0.002), while progesterone concentrations from day 7 to day 13 were higher in the double PG group (p < 0.05). Additionally, CIDR + PG-treated ewes underwent earlier luteolysis, resulting in lower progesterone concentrations during the critical phase for establishing pregnancy. In conclusion, both synchronization protocols effectively induced ovulation; however, the CIDR + PG protocol led to earlier CL regression, which may compromise progesterone support during early gestation and negatively impact reproductive performance in tropical hair sheep.","PeriodicalId":23329,"journal":{"name":"Tropical animal health and production","volume":"57 6","pages":"271"},"PeriodicalIF":1.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144302941","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}

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