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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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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.
Genetic Diversity Analysis and Determination of Specific Alleles of Kuantan Cattle Using Microsatellite Markers R. Misrianti; S. H. Wijaya; C. Sumantri; J. Jakaria
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.2022.45.2.134

Abstract

Kuantan cattle have an important role in Riau Province, Indonesia. Identification of the genetic diversity of these cattle is important to get the basic information for breeding and conservation strategies. The aim of this research was to identify the genetic diversity of Kuantan cattle using microsatellite markers. A total of thirty-nine DNA samples from three breeds were used in this study. The polymerase chain reaction was conducted using four labeled primers of microsatellite (INRA035, ILSTS06, HEL9 and ETH225). The data were analyzed using GenAlEx 6.41, Cervus 3.0, POPTREE, and STRUCTURE Software. A total of thirty-two alleles were found from microsatellite loci. Two alleles in INRA035 locus 112 and 118 occurred as specific allele candidates for Kuantan cattle. The mean of observed heterozygosity value of the Kuantan-2 population (0.602) was higher than Kuantan-1 (0.471) but lower than Madura (0.688) and Pesisir cattle (0.625). PIC value was higher in HEL9 loci. The dendrogram showed that Kuantan cattle existed at different clusters with Pesisir and Madura cattle. This finding indicated that microsatellite markers successfully distinguished clusters of the cattle and could serve as information for conducting conservation and breeding program.
Performance, Carcass Traits, and Meat Composition of Broiler Chickens Fed Diet Containing Fish Oil and Vitamin E Sumiati; A. Darmawan; W. Hermana
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.2022.45.2.195

Abstract

The study aimed to determine the efficacy of dietary vitamin E and fish oils on performance, carcass yield, cholesterol, omega-3, and omega-6 in the meats of broiler chickens. A total of 400 Lohmann day-old broiler chicks consisted of 200 males and 200 females were reared for 35 days. This experiment employed a completely randomized design with five treatments and four replicates. The treatments were T0: Control diet with 3% crude palm oil without vitamin E; T1: Diet containing 3% fish oil; T2: Diet containing 3% fish oil and 80 IU/kg vitamin E; T3: Diet containing 3% fish oil and 100 IU/kg vitamin E, and T4: Diet containing 3% fish oil and 120 IU/kg vitamin E. The result showed that dietary fish oil and vitamin E had no effect (p>0.05) on feed intake, body weight, weight gain, AME, AMEn, TME, and TMEn, but it tended to decrease the mortality rate. T3 significantly reduced (p<0.05) FCR in the finisher phase and meat cholesterol compared to the control. T1 and T3 significantly (p<0.05) reduced carcass weight percentage. Dietary fish oil and vitamin E increased omega-3 levels, and declined the ratio of omega-6 and omega-3. It is concluded that supplementation of 100 IU Vitamin E in the diet containing 3% fish oil improved feed efficiency by 9.95%, decreased cholesterol of the meat by 44.76%, increased omega-3 of the meat by 81.92%, and yielded the best ratio of omega-6: omega-3 of the meat, i.e., 10.34:1.
Risk Factors for Prolonged Birth Interval in Modern Swine Farms in Vietnam N. H. Nam; P. Sukon
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.2022.45.2.173

Abstract

The present study aimed to investigate factors influencing the prolonged birth interval in swine, defined as a birth interval longer than 30 minutes. In total, 3380 piglets born from 239 Landrace x Yorkshire sows from 5 farms in the North of Vietnam were included in this study. The dependent variable was the prolonged birth interval, and independent variables included parity, gestation length, litter size, relative birth order, crown-rump length, birth weight, body-mass index, ponderal index, piglet’s gender, dead-born piglet, and oxytocin use. Important factors for the prolonged birth interval were determined by using Generalized Linear Mixed Models. The incidence of the prolonged birth interval was 14.5%. Crown-rump length (OR=1.09, 95% CI=1.06-1.14), birth weight (OR=1.06, 95% CI=1.02-1.09), and dead-born piglet (OR=1.98-2.08, 95% CI=1.38-2.97) were positively associated with the prolonged birth interval, while litter size (OR=0.90, 95% CI=0.96-0.94) negatively correlated with the prolonged birth interval. The incidence of prolonged birth interval decreased with an increase in relative birth order, bottoming at relative birth order of 40-80, and then increased to the end of parturition. The last piglets had the highest risk of experiencing prolonged birth intervals. This study indicated that prolonged birth interval in swine was common; therefore, careful farrowing supervision should be practiced to reduce stress in sows and piglets.
Somatic Embryogenesis and Plant Regeneration from the Apical Meristem of Wrukwona Napiergrass (Pennisetum purpureum) Treated with Thidiozuron and Cupric Sulfate N. Umami; A. N. Respati; M. M. Rahman; K. Umpuch; T. Gondo
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.2022.45.2.220

Abstract

This study focused on the effectiveness of somatic embryogenesis and regenerated plant in Wrukwona napiergrass. Previously, we studied in vitro propagation of 4 cultivars of napiergrass (Pennisetum purpureum) and showed that only 3.3% of Wrukwona cultivar formed embryogenic callus on day 30 and 21.7% on day 60 of incubation. To improve callus formation performance, it is necessary to develop a special propagation method for Wrukwona cultivar in terms of various growth regulators and additional compounds. This study used several rates of 2.4-dichlorophenoxyacetic acid (2.4-D), benzyl amino purine (BAP), and thidiozuron (TDZ). The result showed that the use of medium Murashige & Skoog (MS) with 2.4-D and BAP at a high ratio of 2.4-D, and TDZ 2 µM formed 78.6% embryogenic callus on day 60th and no albino was found in the regenerated plant. The best combination of growth promotor for embryogenic callus formation was 3 mg L-1 2.4-D, 0.5 mg L-1 BAP, and 2 µM TDZ. Callus proliferation with MS media added with 3 mg L-1 2.4-D, 0.5 mg L-1 BAP, 2 µM TDZ, and 5 µM CuSO4 gave the best proliferation results, with regeneration reaching 65%. All regenerants successfully grew in soil. It can be concluded that somatic embryogenesis of P. purpureum cv. Wrukwona can be produced from MS culture medium using 2 mg L-1 2.4-D, 0.5 mg L-1 BAP, and 2 µM TDZ. Effective multiplication was carried out by adding 5 µM CuSO4 to the same medium as the embryogenic callus formation, and effective regeneration was carried out with MS media containing 2 mg L-1 BAP.
Growth, Blood, and Intestinal Indices of Broilers at High Density Pens Provided with Fermented Averrhoa bilimbi Fruit Filtrate S. Sugiharto; E. Widiastuti; T. Sartono; H. Wahyuni; A. Pratama; T. Yudiarti
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.2022.45.2.202

Abstract

The present study investigated the effect of fermented Averrhoa bilimbi fruit filtrate (FABFF) on growth, blood indices, and gut ecology of broilers raised at a high stocking density. Using 378 chicks (14 days of age), the study was arranged based on a factorial design with stocking densities (normal with 9 birds/m2 or high with 18 birds/m2) and treatment with 2% FABFF from drinking water or not as the two factors. Live body weight and feed consumption were registered weekly, while blood and intestinal contents were collected at day 35. Broilers at high density receiving FABFF had the lowest (p<0.05) feed conversion ratio (FCR). Thymus was smaller (p<0.05) in high-stocked broilers receiving only drinking water. Birds administered FABFF had greater (p<0.05) bursa of Fabricius than birds given plain water. The FABFF elevated (p<0.05) serum superoxide dismutase (SOD) levels of broilers. The malondialdehyde levels were higher (p<0.05) in high-stocked broilers given drinking water compared to normal-stocked broilers given drinking water or high-stocked broilers receiving FABFF. Drinking FABFF elevated (p<0.05) the ratio of lactic acid bacteria/coliform in the ileum. Cecal coliform was less (p<0.05) in chicks receiving FABFF than those receiving only water. High-stocked broilers receiving FABFF showed lower (p<0.05) Enterobacteriaceae counts than the other birds. The ratio of lactic acid bacteria/coliform increased (p<0.05) in broilers receiving FABFF. In conclusion, FABFF was capable of maintaining the development of immune organs and improving FCR, antioxidative status, and intestinal microbial balance of broilers stocked at high-density pens.
A Typological Analysis of Dairy Farms Based on Bulk Milk Price V. D. V. Costa; R. R. Martinelli; F. I. Bánkuti
Tropical Animal Science Journal Vol. 45 No. 3 (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.2022.45.3.374

Abstract

This study sought to examine the relationship between typological characteristics of dairy farms and the price received per liter of bulk milk in transactions with processing companies. During a period from January to March 2018, a total of 143 dairy farmers in western São Paulo State were interviewed on-site using a semi-structured questionnaire containing questions regarding structural, productive, and socioeconomic characteristics of farms and farm operators. Dairy farms were classified into two groups: G1 (n= 129), farms paid below the regional average price per liter of milk; and G2 (n= 14), farms paid above the regional average price per liter of milk. Then, factor analysis was used to extract factors associated with each dairy farm group. Three factors were identified: F1, Milk volume and quality; F2, Road conditions; and F3, Production area. Mean factor scores were compared by the Mann–Whitney U-test (p<0.05). G1 and G2 dairy farms differed significantly in Milk volume and quality (F1). There were no significant differences between G1 and G2 for the other factors. Dairy farms that produced a greater volume of milk and invested more in milk quality secured better prices in transactions with the industry. Based on these findings, it is concluded that actions to increase the scale of production and improve milk quality should be regarded as a priority, thereby increasing the likelihood that dairy farms will remain in business in the long term.
Safranine-O Incorporated in F127 Nanocarriers Reduces the Contamination of Staphylococcus aureus in Sheep’s Milk B. M. Rodrigues; R. C. Silva Junior; B. B. Saraiva; H. L. Perez; L. F. Maia; W. Caetano; C. V. Nakamura; B. A. Abreu Filho; M. S. S. Pozza
Tropical Animal Science Journal Vol. 45 No. 4 (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.2022.45.4.474

Abstract

Mastitis caused by Staphylococcus aureus uses antibiotics as conventional treatment, a practice that has led to bacterial resistance. Therefore, the photodynamic inactivation of microorganisms (PDIM), has the advantage of inactivating pathogens without leading to the selection of resistant microorganisms. The objective of the study was to evaluate the antimicrobial activity of the photosensitizer (PS) Safranine-O (Sf), incorporated in the nanocarrier Pluronic® F127 against strains of S. aureus isolated from sheep milk. The reduction of contamination in experimentally contaminated milk and Muller Hilton Broth (MHB), the formation of microbial biofilm, and its effect as post dipping in the decrease of total mesophilic aerobic and Staphylococcal counts in milk were evaluated. Three strains of S. aureus (SO1, SO3, SO4) and a coagulase-negative Staphylococcus (CNS) strain (SO2) were identified through the nuc and coa genes and all were sensitive to PDIM. The minimum inhibitory concentration (MIC) ranged from 1.18 to 18.75 mg/mL in the different isolates. The SO4 strain was resistant to Ampicillin and Trimetropim. When the microorganisms were cultivated in milk and MHB, there was a reduction in staph counts by 97.33% and 99.63%, respectively. In stainless steel coupons, photoinactivation reduced S. aureus adhesion by up to 45.92% (milk) and 99.5% (MHB) (p<0.05). The photoactivated Sf was similar to commercial lactic acid when applied as a dipping powder. These results showed that Sf mediated PDIM effectively inactivated pathogens that cause mastitis and reduced milk contamination.

Page 21 of 43 | Total Record : 429

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