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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.
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Articles 15 Documents
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Search results for , issue "Vol. 45 No. 2 (2022): Tropical Animal Science Journal" : 15 Documents clear
Inseparability of Dairy Farming Technologies and Their Impacts on Milk Production Systems in Brazil P. G. L. Lima; J. C. Damasceno; A. R. P. Simões; J. A. R. Borges; F. I. Bánkuti
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.239

Abstract

Several studies have analyzed the impact of one technology on the productive performance of dairy systems. However, analyses that consider the impact of joint technologies are scarce. This study was aimed to analyze the inseparability of a set of technologies and their impacts on dairy farm performance. Questionnaires were applied on-site with 155 dairy farmers in Paraná State, Brazil. We collected 17 technological variables related to milk production and variables related to dairy farms’ production. Data analysis was performed in three steps: descriptive analysis, exploratory factor analysis (EFA), and multiple regression. Descriptive analysis was applied to characterize the sample, EFA was applied to generate factors related to the technological variables, and multiple regression was used to compare technological factors with productivity variables – farm performance. Four factors were defined: (i) Forage and farm structure, (ii) management, (iii) genetics, breeding strategies, and concentrate feeding, and (iv) animal health. The four factors significantly explained the differences in milk productivity between dairy farms. Technologies grouped under the factor of genetics were the most important in explaining milk yield per lactating cow, land productivity, and dairy herd reproductive efficiency.
The Libido, Scrotal Circumference, Sperm Quality, and Testosterone Levels of Matured Boer Bucks Supplemented with Selenium N. S. Mariani; M. Wan Zahari; A. M. Marini; A. Abd. Rahman; S. Shanmugavelu; H. Yaakub
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.154

Abstract

A study was conducted to determine the effect of three levels of selenium (Se) supplementation on the libido, scrotal circumference, sperm quality, and testosterone levels in matured Boer bucks. The feeding trial was conducted at MARDI Bachok Station, Bachok, Kelantan, Malaysia, for over six months. A total of 18 matured Boer bucks aged two years with an initial body weight of 53.28±0.62 kg, and no experience of sexual activity was selected for the feeding trial. All animals were randomly divided into three dietary treatments based on a completely randomized design (CRD). Group A and B were supplemented with organic Se at doses of 0.18 mg/kg DM and 0.36 mg/kg DM, respectively, whereas group C acted as a control group (without Se supplementation). Their basal diet consisted of 60% formulated pellet and 40% Brachiaria dictyoneura grass. Daily feed offered (DM basis) was based on 3% of mean body weight. Libido, scrotal circumference, and sperm quality were measured every two months during the feeding trial. Testosterone levels were determined at the end of the feeding trial. The results indicated that the basal diet (control group) was deficient in Se, with the concentration of 0.004 mg/kg. Supplementation of 0.18 mg Se/kg DM only improved the libido and sperm quality (p<0.05). Supplementation of 0.36 mg Se/kg DM significantly (p<0.05) increased libido, sperm quality, and testosterone levels. It is summarized that supplementation of 0.36 mg Se/kg DM has the potential to improve the reproductive performance of bucks, although it occurred at the adult stage.
Mitigation of Polycyclic Aromatic Hydrocarbons Formation in Goat Satay by Shallots Juices Marination E. Saputro; L. E. Radiati; W. Warsito; D. Rosyidi
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.227

Abstract

This study aimed to mitigate the carcinogen formation of polycyclic aromatic hydrocarbons (PAHs) in charcoal-grilled goat satay by marinating raw goat-satay with shallots (Allium cepa var. Ascalonicum) juices. The experiment used a 2 x 4 split-plot factorial randomized block design. The experiment consisted of 2 treatments of 2 goat satay types (without and with sliced fat) and 4 treatments of marination with shallots juice at concentrations of 0%, 10%, 20%, and 30% (gmL-1 of fresh shallots in distilled water) for 60 minutes at 4 °C. A total of 24 samples of raw and grilled goat-satay were used for 3 replication groups. The marination with 10% and 20% shallots juices significantly reduced the BaP and BaA until they were not detected even though they increased the non-carcinogenic Pyr levels in the grilled goat-satay with and without sliced fat. The marination with 10%, 20%, and 30% shallots juice significantly prevented the formation of Phe, Ace, and Nap so that they were not detected in the grilled goat-satay with and without sliced fat. The marination with 30% shallots juice of raw goat-satay without sliced fat resulted in the highest antioxidant activities and detectable BaP levels (3.88 mg kg-1).
Forage Production and Quality of BRS Capiaçu as a Response of Cutting Age and Nitrogen Application J. P. Alves; S. S. Mendes; E. S. Galeano; M. A. P. Orrico Junior; T. Fernandes; M. Retore; A. C. A. Orrico; L. da S. Lopes
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.179

Abstract

Capiaçu is a cultivar of elephant grass (Pennisetum purpureum Schum.), which is a promising species for use in ruminant feed and presents a high potential for biomass production. However, as this grass became subjected to different management strategies, fluctuations in biomass production were observed, reflecting on its nutritive value. The objective was to verify the effect of cutting age and nitrogen (N) application on the productivity and nutritional value of BRS Capiaçu. A randomized block design was used in a 3 × 3 factorial scheme: three cutting ages (60, 90, and 120 days) and three levels of nitrogen fertilization (0, 100, and 200 kg N/ha/year). The variables evaluated were: productivity and chemical composition of the leaf, stem, and whole plant fractions, besides the production of nutrients and efficiency of utilization of applied nitrogen (EUAN). There were interaction effects between cutting ages and N application on dry matter (DM), crude protein (CP), cellulose, hemicellulose, and lignin production. Plants cut every 120 days and fertilized with 100 or 200 kg N/ha had the highest annual DM production. Nitrogen fertilization was efficient in increasing the percentage of leaves and the production of CP and DM digestibility of the grass. The highest CP production (in kg/ha/year) was observed for the 60- and 90-days old grass fertilized with 200 kg of N/ha/year. Grasses that were cut every 90 days and that received nitrogen fertilization of 100 kg N/ha/year were the ones that presented the highest EUAN. The cutting at 90 days of age, associated with N fertilization of 100 kg N/ha/year, is the best strategy for BRS Capiaçu.
Variation and Association of Avian β-Defensin 2 Gene with the Concentration of Immunoglobulin Y and the Titer of Newcastle-Disease Antibody in IPB-D1 Chicken D. Lestari; Masruroh; I. Khaerunnisa; S. Murtini; N. Ulupi; A. Gunawan; C. Sumantri
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.121

Abstract

Defensins play roles in innate immunity by exhibiting antimicrobial activity against microbes such as gram-negative and -positive bacteria, viruses, and fungi. This study aimed to identify variants of the Avian β-Defensin 2 (AvBD2) and determine their associations with the concentration of immunoglobulin Y and the titer of Newcastle disease (ND) antibody in IPB-1 chicken. The chicken population used in this study was 21-week-old IPB-D1 chickens (n=90). Variations in AvBD2 were analyzed by direct DNA sequencing. IgY concentration was measured by indirect ELISA, and the titer of ND antibody was measured by the hemagglutination-inhibition test. The AvBD2 association was analyzed by the general linear model procedure and Duncan’s multiple range test. The results revealed 10 SNPs located in intron 1 (3 SNPs), exon 2 (3 SNPs), and intron 2 (4 SNPs). Six of these SNPs were associated with IgY concentration. The CC genotype of g.5002 C>T was associated with IgY concentration and produced the highest mean IgY concentration. This g.5002 C>T mutation results in alanine-to-valine substitutions. The CC genotype of g.5002 C>T could be considered as a criterion for selecting chickens with high IgY concentrations.
Different Nutritional Systems at Suckling and Finishing Phases of Lambs Grazing on Tropical Pasture J. A. da Silva; C. C. B. F. Ítavo; L. C. V. Ítavo; F. A. Batista; M. M. S. Peres; N. S. Heimbach; G. K. A. de Melo; P. C. G. da Silva; K. L. S. M. Ferelli; T. F. F. S. Arco; C. de Godoy; A. A. S. Miguel
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.187

Abstract

The objective of the study was to evaluate the lambs' performance in the suckling and finishing phases in different nutritional systems. The study was carried out in two phases: suckling (from birth to weaning) and finishing (from weaning to slaughter). Each phase was evaluated in two experimental periods (characterized by year). The suckling phase used 76 lambs divided into two groups: control (without supplementation) and creep feeding (with creep feeder supplementation of 20 g/kg of body weight). The lambs were distributed in the treatments according to sex and type of delivery (single or twin). The finishing phase was characterized from weaning to slaughter. Sixty-two lambs were used, 28 females and 34 males, average age of 85 days and an average weight of 19 kg, and the animals were distributed in treatments according to weight and sex. Five treatments were evaluated, animals in Brachiaria spp. receiving increasing levels of supplementation (0%, 0.8%, 1.6%, and 2.4% of BW) and confinement as a positive performance control. The creep feeding treatment presented superior performance with an average daily gain of 64.85 g more than the control treatment, which anticipated the shorter age at weaning with higher weaning weight (weaning in 64 days for supplemented lambs and 77 days for animals without supplementation). In the finishing phases, the lambs of the treatments 1.6%BW and 2.4%BW presented average daily gain similar to the confined animals and higher (p<0.05) than the treatments 0.8%BW and 0%BW. We recommend that ad libitum supplementation of creep feeding during the suckling phase is a nutritional strategy to wean heavier lambs and consequently reduce time in the finishing phase. For fattening the lambs, we recommend the inclusion of protein-energy supplementation of 1.6% BW for lambs produced in the tropical pasture.
Characterization of Hemagglutinin Gene Fragment of H9N2 Avian Influenza Virus Isolated from Environmental Live Bird Market in the Greater Jakarta Area N. R. Maharani; H. Susetya; M. H. Wibowo
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.141

Abstract

Virus H9N2 has become the most common subtype of low pathogenic avian influenza (LPAI) in poultry and shows the ability to infect humans. One of the important factors triggering the virus ​​pandemic is the live bird market (LBM). The virus acts as an internal gene donor in the other subtypes, such as H5N1, H5N2, H7N9, and H10N8, in poultry and humans. This study was conducted to detect the presence of the H9N2 virus and the molecular characteristics of the hemagglutinin gene fragment at the cleavage site, receptor binding site, antigenic site, and glycosylation site positions of the H9N2 subtype AI virus isolated from the LBM environment. This study used Disease Investigation Center Subang isolates from environmental samples of LBM in the Greater Jakarta area (DKI Jakarta, Bogor, Depok, Tangerang, and Bekasi) in 2019. Based on molecular detection using RT-PCR and RT-qPCR, it was found that avian influenza subtype H9N2 was detected. This indicates that LBM has the potential to be the source of the spread of the ​​H9N2 virus. The pattern of the amino acid cleavage site PSRSSR↓GLF indicates that the research sample belongs to the low pathogenic AI. The substitution of amino acids in the receptor binding site and antigenic site increases the specificity of non-human host recognition. The potential glycosylation site, with the NCS motif found in amino acid position 295-297, close to the receptor-binding site. Based on genetic analysis and phylogenetic topography, the virus is included in the CVI (China, Vietnam, Indonesia) lineage and subclade H9.4.2.5.
Genetic Association and Expression of JHDM1A Gene Related to Meat pH in Commercial Pigs A. Kayan; S. Theerawatanasirikul; P. Lekcharoensuk; C. Boonkaewwan; A. Kaewkot; M. Chanaksorn; C. Tantikositruj; A. Gunawan
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.128

Abstract

An experiment was conducted to study the association and expression of JHDM1A gene as a candidate gene for meat quality. The polymorphism was genotyped by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) using restriction enzyme on a total of 300 muscle samples of [Duroc × (Large White × Landrace)] pigs. Results showed that JHDM1A gene was significantly associated with meat pH 45 min post-mortem (p.m.) (p<0.05). Allele frequencies for G and C were 0.53 and 0.47. The genotype frequencies for GG, GC, and CC were 0.24, 0.58, and 0.18, respectively. The Quantitative Reverse Transcription Polymerase Chain Reaction (qRT-PCR) study were analyzed between low and high pH 45 min p.m. groups (n=10 per group) according to the association result. JHDM1A expression was higher in animals with a low post-mortem meat pH 45 min (p<0.05). Therefore, polymorphism and expression in the porcine JHDM1A gene might be the important candidate genes to improve meat quality traits in terms of meat pH.
New Multi-Locus Sequence Typing of Mycoplasma hyorhinis Isolated from Pig Farms in Central Thailand P. Fungwithaya; S. Samngamnim; S. Luengyosluechakul; P. Assavacheep
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.164

Abstract

Mycoplasma hyorhinis (M. hyorhinis) is an important pathogen in the pig industry, especially during the nursery period. Multi-locus sequence typing (MLST) is a specific method used to identify many bacterial species. At present, 108 MLST schemes of M. hyorhinis have been reported around the world. This study aimed to investigate the variable multi-locus sequence typing (MLST) schemes of M. hyorhinis in pig herds from bacterial stock at the large animal hospital, Faculty of Veterinary Science, Chulalongkorn University, since 2010. Bacteria were collected from 98 deceased pigs sent for autopsy at this veterinary hospital. Samples were collected from at least one lesion per pig located in the joint capsule, lung, thoracic cavity, abdominal cavity, and pericardium. Bacteria were cultured and confirmed the species by PCR. MLST was detected by PCR and DNA sequencing. Sequence data were reported to GenBank and PubMLST databases. In this study, the positive results of M. hyorhinis were found on 75 samples, while 23 samples gave negative results. The highest population of this pathogen was shown on the joint organ but no significant difference with the other organs. Only nine positive samples could be cultured, purified, and sent for sequencing. Sequencing results revealed 6 MLST schemes, while 5 of them were defined as new ST types (ST71-75) defined for the first time in Thailand. A diverse array of MLST in this location, some of which are novel, implied that bacteria might adapt to their environment. MLST information might play a role in vaccine development and preventative strategies.
Physiological and Behavioral Responses of Sohagi Ewe Lambs Exposed to Direct Sunlight Under Subtropical Climatic Conditions M. Y. Elaref; G. M. Solouma; D. A. Abdel-latef
Tropical Animal Science Journal Vol. 45 No. 2 (2022): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2022.45.2.213

Abstract

This study aimed to assess the ability of Sohagi ewe lambs to adapt to heat stress conditions during the summer season in arid regions of Sohag governorate, Egypt. Twenty-one Sohagi ewe lambs (9-11 months old and 25.55±2.69 kg average body weight) were divided into three equal groups. In the 1st group, ewe lambs were housed in an indoor barn and considered as control (DS0), while those in the 2nd and 3rd groups were daily exposed to direct sunlight in the outdoor barns for 4 hours (DS4) and 8 hours (DS8), respectively. Physiological, blood parameters, and daily behavioral activities of each animal in experimental groups were obtained and data were analyzed in a completely randomized design. Results showed that rectal temperature, respiration rate, and water consumption of Sohagi ewe lambs in DS4 and DS8 groups increased significantly (p<0.05) compared with those in the control one. The means of packed cell volume, hemoglobin, red blood cell counts, white blood cell counts, and neutrophil to lymphocyte ratio increased significantly (p<0.05) in ewe lambs in DS4 and DS8 than those in DS0. Glucose and total protein level of ewe lambs in DS4 and DS8 decreased significantly (p<0.05) compared with those in DS0, while potassium levels increased significantly (p<0.05), and sodium levels did not change. Daily behavioral observation illustrated that eating activities increased significantly (p<0.05) at night between sunset and sunrise in DS4 and DS8 than in DS0. Also, standing time in DS4 and DS8 groups increased significantly (p<0.05) compared with DS0. It could be concluded that the productive performance of ewe lamb groups exposed to direct sunlight was not affected. At the same time, physiological responses were significantly increased, reflecting the adaptability of Sohagi ewe lambs to heat stress under subtropical climatic conditions.

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