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Tropical Animal Science Journal
Published by Institut Pertanian Bogor
ISSN : 2615787X     EISSN : 2615790X     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Energy
ropical Animal Science Journal (Trop. Anim. Sci. J.) previously Media Peternakan is a scientific journal covering broad aspects of tropical animal sciences. Started from 2018, the title is changed from Media Peternakan in order to develop and expand the distribution as well as increase the visibility of the journal. The journal is published three times a year in April, August, and December by Faculty of Animal Science, IPB University (Bogor Agricultural University), associated with Animal Scientist's Society of Indonesia. The first edition with the new title will be published in April 2018 edition (Vol 41 No 1 2018), while the previous edition (up to 2017 edition) will still use Media Peternakan as the title and could be accessed in the old website (http://medpet.journal.ipb.ac.id/). This journal has been accredited by National Journal Accreditation (ARJUNA) Managed by Ministry of Research, Technology, and Higher Education, Republic Indonesia with First Grade (Sinta 1) since year 2018 to 2022 according to the decree No. 30/E/KPT/2018.
Arjuna Subject : -
Articles 429 Documents
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The Improvement of Broiler Performance with Modification of Particle Size and Palm Kernel Meal Levels Setiana, I.; Nahrowi; Sumiati; Subekti, S.
Tropical Animal Science Journal Vol. 48 No. 2 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.2.139

Abstract

Palm kernel meal (PKM) is a by-product of palm oil production and can be used as an energy source in broiler feed. However, the utilization of PKM in broiler feed has yet to be optimal due to its low nutrient digestibility. This study aims to evaluate the particle size and the levels of PKM in the feed to increase broiler performance. The particle sizes used in this study were 2.5 and 1 mm, and the levels were 5%, 10%, and 15%. An in vivo study was conducted using 1,440 Ross 308 broilers day 0-35, with an average initial weight of 47 grams. The study employed a completely randomized factorial design of 2x3, divided into 6 treatments consisting of (T1) 2.5 mm at 5% PKM as a control, (T2) 1 mm at 5% PKM, (T3) 2.5 mm at 10% PKM, (T4) 1 mm at 10% PKM, (T5) 2.5 mm at 15% PKM, and (T6) 1 mm at 15% PKM on feed. The studied variables were body weight (BW), feed intake (FI), feed conversion ratio (FCR), European production efficiency factor (EPEF), and carcass quality. Increasing PKM levels decreased the pellet durability index of broiler feed. During the starter stage (days 0-21), 1 mm PKM significantly improved FCR (p<0.05) compared to 2.5 mm, although PKM levels did not significantly affect broiler performances. In the finisher stage (days 22-35), 15% of PKM levels negatively impacted FCR and EPEF. Overall, from 0-35 days of age, the best broiler performances showed by treatment T2 with 1 mm particle size and 5% PKM.
Growth Performance and Hematology of Khao Lamphun Calves with the Implementation of Creep Feeding Suerphang, C.; Sittiboonma, A.; Sorachakura, C.; Intawicha, P.; Panase, P.; Laorodphan, N.; Dongpaleethun, C.; Chiang, H. I.; Ju, J. C.
Tropical Animal Science Journal Vol. 48 No. 2 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.2.163

Abstract

The study aimed to evaluate the effect of creep feeding on growth performance and the hematological and biochemical profiles of Khao Lamphun calves. Twenty Khao Lamphun cow-calf pairs were randomly allotted into two treatments: T1, no supplementation of creeping feed (n=10), and T2, with concentrates as creep-feeding (n=10). Production or growth performance was evaluated based on body weight gain (BWG), heart girth (HG), hip height (HH), and body length (BL) throughout the experimentation. By day 120, the final live weight of the creep-fed calves was greater than the non-creep-fed calves, p<0.01). The creep-fed calves also showed a higher average BWG than the non-creep-fed calves. The final body conformation indices, i.e., HG, HH, and BL of the creep-fed calves, were higher than the non-creep-fed p<0.05). The hematological profiles showed no difference in the plasma glucose levels between the two groups. The cholesterol level of the creep-fed calves was higher than the non-creep-fed calves (p<0.05). Similarly, no differences were found in calf's serum biochemical and differential leukocyte profiles between treatment groups. In conclusion, the implementation of creep feeding can lead to improved growth performance and health parameters of Khao Lamphun calves. Therefore, it is recommended as a routine practice to enhance the productivity of Khao Lamphun calves in Thailand and, presumably, in other cattle farms.
Selective Anthelmintic Treatment at Different Physiological Stages in Hair Sheep Under Humid Tropical Conditions Luna-Palomera, C.; Sanchez -Dávila, F.; González-Garduño, R.; Domínguez-Viveros, J.; Ojeda-Robertos, N. F.; Maldonado García, N. M.
Tropical Animal Science Journal Vol. 48 No. 2 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.2.93

Abstract

Ewes’ genotype and physiological stage are important factors associated with gastrointestinal nematode infection. The aims were to evaluate the parasitic (fecal eggs count, FEC), health (anemia level, FAMACHA; packed cell volume, PCV; hemoglobin, HGB), and productive response (live weight, LW; body condition score, BCS) of hair ewes managed under a selective deworming program with levamisole (7.5 mg/kg of live weight) at reproductive stages (not pregnant, NPW, n=17; ewes between the first and second third of gestation, 1-3PW, n=22; ewes in the last third of gestation and peripartum, 4-5PWN, n=16) and genotype groups (Pelibuey, PB, n=12; Katahdin, KT, n=12; Pelibuey × Katahdin, F1 PB×KT, n=16; and Pelibuey × Dorper F1 PB×DP, n=15). The effects of treatments were studied using analysis of variance, considering the reproductive stages and genotypes as treatments through 4 evaluation periods (days 20, 48, 76, and 104). FEC values were higher (p<0.01) for ewes at 4-5PW than 1-3PW and NPW. FAMACHA, PCV, LW, and BCS were similar in ewes regardless of the reproductive stage. On day 48 post-deworming (levamisole at 7.5 mg/kg of LW), the proportion of ewes with >800 e/g was higher (13.74%) at 4-5PW than at the peripartum stage. On day 76, the accumulated proportion of ewes that were dewormed was higher (p<0.05) at 4-5PW than at the peripartum stage. The accumulated total proportion revealed that the genotype F1 PB×DP ewes had the highest deworming requirement (p<0.05), being dewormed at least once (32.8%). According to the indicators of LW, BCS, FAMACHA, FEC, PCV, HGB, and proportion of dewormed animals, ewes with the F1 PB×KT genotype showed the best performance. Therefore, reproductive stage-orientated management and the use of the best genotype for grazing conditions combined with a selective deworming program can contribute significantly to the control of gastrointestinal nematodes.
Expression of Progesterone Receptor Membrane Component 1 (PGRMC1) in Follicular and Luteal Tissues in Goats – Effect of Short-term Concentrate Supplementation Mohammed, N. H.; ShikhMaidin, M.; Yong, C. S. Y.; Ling, K. H.; Martin, G. B.
Tropical Animal Science Journal Vol. 48 No. 2 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.2.113

Abstract

This study evaluated the effects of short-term supplementation with concentrate on ovulation rate, plasma progesterone concentrations and gene expression for Progesterone Receptor Membrane Component 1 (PGRMC1) in ovarian tissues of Boer goats. Twenty females were allocated to two groups: 1) Control, receiving a maintenance diet consisting of 70% Napier grass plus 30% concentrate (4.45 MJ/day); 2) Supplemented, receiving twice their required metabolizable energy for maintenance by adding extra concentrate (8.90 MJ/day). The dietary treatments were applied for 25 days, beginning 5 days before (Day 5) CIDR removal (Day 0). On Day 19, the ovulation rate was estimated by trans-rectal ultrasonographic scanning. Blood was sampled for progesterone (P4) analysis every 2 days, from Days 9 to 27. On Day 27, the level of expression of PGRMC1 was assessed in follicles and corpora lutea. The ovulation rate was not affected by treatment (Control 1.00 ± 0.24; Supplemented 1.25 ± 0.25). Over Days 13 to 27, plasma P4 concentrations were significantly (p<0.05) greater in the Supplemented group than in the Control group. The expression of PGRMC1 in follicular and luteal tissues was greater in the Supplemented group than in the Control group (p<0.05). There was a positive correlation between PGRMC1 expression and P4 concentration (r= 0.65, p<0.05). It was concluded that, in goats, short-term concentrate supplementation could increase P4 concentrations, at least in part, by influencing the expression of PGRMC1. This finding suggests that short-term concentrate supplementation can support embryo development during the luteal phase and early stages of pregnancy.
Elephant Grass Silage with Pelleted Citrus Pulp: Chemical Composition, Digestibility, and Feedlot Costs Barbosa, C. R.; Santos, M. M. E.; Meirelles, P. R. L.; Torres, R. N. S.; Baldassini, W. A.; Costa, C.
Tropical Animal Science Journal Vol. 48 No. 2 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.2.148

Abstract

This study aimed to assess the effects of including pelleted citrus pulp (PCP) in BRS Capiaçu elephant grass silage on its chemical composition and digestibility and the production costs of feedlot diets for beef cattle. A completely randomized experimental design in a 2×5 factorial scheme was used considering 90- and 120-day harvesting intervals for ensiling and five inclusion levels of PCP (0%, 3%, 6%, 12%, or 24% as fed). The dry matter (DM) content of the silages increased with regrowth interval (p<0.01) and there was a quadratic response to the inclusion level of PCP (p<0.01). Total digestible nutrients of the silages decreased with increasing Capiaçu regrowth interval (p<0.01) but increased linearly with increasing inclusion levels of PCP during ensiling (p<0.01). The in vitro DM digestibility of silage increased linearly with the inclusion of PCP (p<0.01) and with increasing regrowth interval (p<0.01). The inclusion of PCP and grass regrowth interval linearly increased DM recovery from silage (p<0.01). Adding up to 24% PCP during the ensiling of Capiaçu improves the fermentation profile and nutritional value of the silage and digestibility parameters. Based on economic analysis, we recommend the use of silage prepared from Capiaçu harvested at 120 days and containing 6% to 12% PCP because of its lower cost per unit of gain ($/arroba produced), cost per animal, and total feedlot costs compared to the other treatments.
Logistic Regression Analysis of Factors Influencing Mobile Application Adoption in Smallholder Livestock Farming: A Case Study from Northern Thailand Saengwong, S.; Kongmuang, N.; Intawicha, P.; Sakphoowadon, S.
Tropical Animal Science Journal Vol. 48 No. 2 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.2.171

Abstract

This study examines the factors affecting the adoption of mobile farming management applications by smallholder livestock farmers in Northern Thailand. Data from 300 farmers were analyzed using binary logistic regression to evaluate 14 independent variables and their influence on application use. Four significant factors were identified: education level, participation in training programs, extension support, and membership in farmer associations. Education and participation in training programs were highly significant (p<0.001), whereas extension support and membership in farmer associations were both significantly associated with mobile application use (p<0.01 and p<0.05). Our findings indicate that educational initiatives, training programs, and strong extension support are crucial in enhancing mobile application adoption. Farmer associations also play a vital role in promoting technology use through peer influence and social networks. These insights highlight the importance of targeted strategies to improve mobile application adoption, thereby contributing to more efficient livestock management practices. To create practical and long-term digital solutions specifically designed to meet smallholder farmers’ requirements, it is essential to gain an in-depth understanding of these elements. The findings highlight the importance of addressing educational gaps, promoting training programs, and enhancing extension services to encourage technology adoption among smallholder farmers. By focusing on these critical factors, farmers can increase their adoption of mobile applications, thereby improving livestock management efficiency and enhancing the adaptability of smallholder farming systems in rural areas.
Early Gestation Feeding Method Improves Reproductive Performance of Sow Su, S. P.; Hsia, L. C.; Jantasin, W.; Lee, J. W.; Hsuuw, Y. D.
Tropical Animal Science Journal Vol. 48 No. 2 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.2.156

Abstract

The relationship between feed intake during early gestation and sows’ reproductive performance is controversial. The purpose of this experiment was to investigate the effects of different feeding strategies during early gestation on reproductive performance in sows. A total of 24 primiparous sows were randomly assigned to one of the following three treatments: Treatment 1: Feed 1.5 kg from mating to day 30 of gestation; Treatment 2: Feed 1.5 kg from mating to day 7, then feed 2.5 kg from days 8 to 30; Treatment 3: Feed 2.5 kg from days 0 to 30. Increased feed intake affected body weight during early gestation. The treatment provided 2.5 kg per day resulted in the highest litter size. While there was no significant difference in litter size between Treatment 2 and Treatment 3, the birth weight and weaning weight of piglets in Treatment 2 seemed better than those in Treatment 3. Increasing feed intake during early gestation (days 0–30) significantly increased litter size. However, Treatment 2, which increased feed intake from days 8 to 30, improved growth performance but did not enhance reproductive performance. In conclusion, high feed intake throughout early gestation significantly increased litter size but also had the potential to increase the number of stillbirths.
Transcriptome Analysis and Sensory Evaluation of Thai Native Chicken Raised in Conventional and Free-Range Conditions Seritrakul, P.; Poommarin, P.
Tropical Animal Science Journal Vol. 48 No. 2 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.2.102

Abstract

Ethically raised animal products are believed to be better for both the environment and consumer health. Despite advances in chicken genetics and production systems, we still know little about how free-range condition affects the birds at a molecular level, specifically their gene expression and the resulting meat characteristics. This study aims to compare the transcriptome of Thai Praduhangdum, a native meat chicken raised in conventional floor pen and free-range systems, and investigate how these conditions cause gene expression changes at the molecular level and phenotypic changes in terms of meat sensory evaluation score. A total of 100 Thai Praduhangdum chickens were raised under a free-range system and a conventional floor pen system. At 6 months, blood samples were collected for transcriptome analysis and verified by quantitative real-time PCR. Additionally, meat samples were collected and sensory panel evaluation was performed. A total of 278 unique genes showed significantly different expression levels in either up-regulated or down-regulated direction. Gene set enrichment analysis revealed that these genes are associated with multicellular organism processes, development, and cell differentiation. Meat sensory panel evaluation showed that consumers preferred the appearance of the breast meat from the free-range chicken over the conventional floor pen chicken. Overall, the free-range condition caused detectable differences in gene expression and meat quality of Thai native chicken. The genes and pathways identified in this study provide a starting point for further functional tests and investigations into the relationship between chicken welfare and the physiological response at a molecular level.
Silage Quality, Rumen Fermentation Characteristics, and Nutrient Digestibility of Sorghum bicolor cv. Samurai 1 Harvested at Different Maturity Stages Treated with Fibrolytic Enzyme Ratnaningtyas, F. A.; Abdullah, L.; Kumalasari, N. R.; Ernawati, A.; Ridla, M.; Diapari, D.; Karti, P. D. M. H.
Tropical Animal Science Journal Vol. 48 No. 3 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.3.211

Abstract

The Samurai 1 variety is a genetically mutated strain with superior agronomic characteristics and enhanced nutrient content. This study aimed to evaluate the effect of harvest maturity stages and fibrolytic enzyme (Sunsonzyme) treatment on the nutrient value, fermentative quality, and nutrient digestibility of Sorghum bicolor cv. Samurai 1 silage. The silage quality was assessed using a completely randomized design with a 3 x 3 factorial arrangement. Sorghum was harvested at three different maturity stages, namely 85, 90, and 95 days, with fibrolytic enzyme added at 0%, 0.025%, and 0.05% of the dry matter. In vitro fermentability and digestibility were evaluated using a randomized block factorial design, which was also based on the same three harvest stages and enzyme levels. Observed variables included the nutrient composition of the sorghum, physical characteristics and nutrient content of the silage, as well as in vitro fermentability and digestibility. The results showed a significant interaction between harvest maturity and enzyme level on lactic acid production and total volatile fatty acid (VFA). Harvest age significantly affected (p<0.05) all variables, while the treatment of fibrolytic enzyme significantly increased ammonia (NH₃) and total VFA concentrations, as well as reduced the fiber fraction of the silage (p<0.05). The harvest age of 90 days showed the best quality in terms of nutrients, silage, and rumen fermentability. The addition of enzyme levels up to 0.05% improved the fermentative quality of silage, reduced fiber fractions, and enhanced rumen fermentability.
Genomic Signatures of Positive Selection and Local Adaptation in Ethiopian Sheep Populations Demissie, B. E.; Tarekegn, G. M.; Dadi, H.; Edea, Z.; Woldesemayat, A. A.; Kim, K-S; Girma, S.; Seyoum, T.; Melaku, K.; Keskes, S.
Tropical Animal Science Journal Vol. 48 No. 3 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.3.179

Abstract

Domestic sheep (Ovis aries) have adapted to diverse ecological regions and exhibit various phenotypic traits through long-term natural and artificial selection. Indigenous sheep populations, in particular, have developed valuable traits such as disease resistance, heat tolerance, and resilience to harsh environments. Understanding the genetic mechanisms underlying these adaptive traits is crucial for enhancing, sustainably utilizing, and conserving sheep genetic resources. In this study, we aimed to assess genomic selection among five Ethiopian indigenous sheep populations sampled from various ecological regions. Whole blood samples were randomly collected from 48 sheep representing two populations (Semien and Selale) from different ecological regions and genotyped using the Ovine 50K SNP BeadChip. Genotype data from three Ethiopian sheep populations was additionally included in the analyses. Fixation index (FST) and cross-population extended haplotype homozygosity (XPEHH) methods were used to detect signatures of positive selection. Functional analysis revealed genes related to plateau adaptation, immune response, and tail fat formation. Our study identified potential genes associated with alpine and sub-alpine adaptation, including GABRG3, SYT1, TGFBR3, ITPR2, KCNMB2, and ATP1A3. Candidate genes linked with wet highland adaptation, including GNB1, HDAC9, IGFBP6, JAKMIP1, PAK2, and EXOC4, were also detected as under selection. The BMP2 gene, known for its fundamental role in sheep adipose tissue, emerged as a positional candidate gene for tail fat formation. This study offers novel insight into genomic adaptation to alpine, sub-alpine, and wet highland ecological regions in sheep and provides a valuable resource for further investigation. Moreover, it contributes worthwhile information for sustainable conservation and utilization, and lays the groundwork for future research into the genetic mechanisms behind sheep adaptability to diverse ecological regions.

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