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Tropical Animal Science Journal

tasj
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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 283 Documents

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Morphological Characterization of Goat Populations in Central Zone of Tigray, Ethiopia M. Birhanie; K. Alemayehu; G. Mekuriaw
Tropical Animal Science Journal Vol. 42 No. 2 (2019): 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.2019.42.2.81

Ethiopia has huge livestock resource, but poor in their productivity. It stated national small ruminant breeding policy and strategy focused on genetic improvement. This is intended to design appropriate breeding programs based on the indigenous breeds status. Study of phenotypic variation is among the prerequisite activities of genetic improvement that is limited in this study area. The objective of this study was to describe morphological characteristics and variations of goat populations in the Central zone of Tigray. Qualitative and quantitative data of 403 young to matured goats (326 lactating does and 77 bucks) were used to analyze by frequency procedure, GLM procedure, Pearson correlation, and multivariate analysis of SAS version 9.4. The study revealed that goats in Adwa district were distinct in coat colors and pattern, horn shape, ear orientation, head profile and ruff, significantly heavier (p<0.01) and larger (p<0.001) in height at withers and in height at pelvic than those in Tanqua Abergele (TA) and Kola Tembien (KT) districts. Goats found in Adwa district were morphologically distinct from those found in TA and KT districts with the higher discriminating values in female goats.

Polymorphism of Bovine Growth Hormone Receptor Gene (g.3338A>G) and Its Association with Body Measurements and Body Weight in Pasundan Cows W. P. B. Putra; P. P. Agung; S. Anwar; S. Said
Tropical Animal Science Journal Vol. 42 No. 2 (2019): 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.2019.42.2.90

Bovine growth hormone receptor (bGHR) gene was one of the growth hormone family genes that important for body growth and development of cattle. This research was carried out to identify the polymorphism in the exon 10 of bGHR gene from 142 heads of Pasundan cows at West Java and its association with body length (BL), withers height (WH), heart girth (HG), and body weight (BW). There are two mutation points in the bGHR gene based on the sequencing analysis i.e. g.3322del.A and g.3338A>G. The single nucleotide polymorphism (SNP) at g.3338A>G was detected using PCR-RFLP method with AluI restriction enzyme and showed three genotypes of AA (0.49), AG (0.37), and GG (0.14). The allelic frequencies were 0.67 (A) and 0.33 (G). The number of allele effective (ne) value was 1.79 and described that A allele was the higher allele in the bGHR gene in this study. The polymorphic informative content (PIC) value was 0.34 and categorized as a moderate category. The Chi-square (χ2) analysis showed that the population sample was in the Hardy-Weinberg equilibrium (χ2<5.99). It was concluded that the polymorphism of bGHR gene had a significant association (p<0.05) with BL, WH, and BW of Pasundan cows. Research showed that all body measurements in GG genotype animals were lowest than other genotypes. Meanwhile, the highest of BW was showed in GG genotype. In addition, the average of BL, WH, HG, and BW in Pasundan cows (2 PPI and 3PPI) were 126.88±14.25 cm; 133.97±31.69 cm; 145.35±13.56 cm and 201.85±44.87 kg, respectively.

Modeling Price Volatility and Supply Response of Beef in Indonesia Komalawati Komalawati; R. W. Asmarantaka; R. Nurmalina; D. B. Hakim
Tropical Animal Science Journal Vol. 42 No. 2 (2019): 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.2019.42.2.159

Beef is one of the strategic livestock commodities in Indonesia. As demand increases, the price of beef increases and tends to be volatile. The increased volatility in beef prices could influence production decision and the supply of beef. This study aimed to investigate the price volatility and the impact of price volatility on the supply response of beef in Indonesia. This study used secondary data obtained from various related institutions. Volatility was estimated using the GARCH (p,q) model and the supply response model using OLS model. The empirical results indicated that among the estimated GARCH models, the GARCH (2,3) seemed to be particularly appropriate to describe the beef price supply response. Beef price volatility in Indonesia was found to be low and persistent in the long run. Price uncertainty appeared to have a substantial negative effect on Indonesian beef production. The slow adjustment of farmers to demand and supply shocks indicate the importance of import as a temporary policy to fulfill the demand of beef in the short and medium-run.

The Impact of Vertical Integration Intensity on Broiler Farms Technical Efficiency: The Case of Contract Farming in West Sumatera Harianto Harianto; N. Kusnadi; D. A. Paramita
Tropical Animal Science Journal Vol. 42 No. 2 (2019): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Contractual arrangements of different types have increasingly found in West Sumatera not only in subsistence and commercial crops but particularly also in livestock sector. Contract farming in livestock agribusiness is generally defined as broiler farms under an agreement between farmers and a livestock inputs supplier. Within this broad definition, there are different variants of contracts depending on the formality and intensity of contractual arrangement. This study objective was to prove that the design of a contract, as representation of vertical integration intensity in broiler agribusiness, has different efficiency effects on production. The stochastic frontier production function was used in this study, and employed a regression method to estimate the level of technical efficiency. Data were collected from 87 broiler fattening farms consisted of 50 broiler fattening farms under formal contractual system and 37 broiler fattening farms under informal contractual system. The results showed that farm experience and improvement of the contract system would reduce the level of technical inefficiency of broiler farms. The study concluded that broiler farms under formal and detail contract farming had greater technical efficiencies compared to broiler farms under informal unwritten contract arrangement. However, the broiler farms under informal contract obtained higher net returns compared to the broiler farms under formal contract arrangement.

Productivity, Nutrient Composition, and Hydrocyanic Acid Concentration of Super-2 Forage Sorghum at Different NPK Levels and Planting Spaces D. Astuti; B. Suhartanto; N. Umami; A. Irawan
Tropical Animal Science Journal Vol. 42 No. 3 (2019): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Low digestibility and toxicity of hydrocyanic acid (HCN) in sorghum forage are disadvantage for ruminant. Appropriate fertilizer application and planting strategy can improve sorghum yield and quality. A field experiment was aimed to investigate the productivity, nutrients content, and HCN concentration of Super-2 forage sorghum (Sorghum bicolor (L) Moench) at different planting spaces and levels of NPK fertilizer. The seeds were planted according to 3×3 factorial design in which the first factor was planting space (J1= 90×20 cm, J2= 75×25 cm, and J3= 60×30 cm) and the second factor was three levels of NPK fertilizer (P1= 0 kg/ha; P2= 100 kg/ha; and P3= 200 kg/ha, respectively). Crude protein (CP), crude fiber (CF), and HCN concentration were affected by the interaction of NPK levels × planting spaces (p<0.05). The CP and HCN content increased as NPK levels increased at all planting space patterns while CF content decreased. NPK fertilizer application significantly increased yield production (DM, OM, and CP productions), whereas planting space treatment did not show any improvement except for CF that significantly lower on 60×30 cm planting space. Sorghum receiving 200 kg/ha of NPK at 60×30 cm planting space produced the highest CP and the lowest CF content, resulting in the highest OM and CP biomass production. In conclusion, NPK fertilizer significantly improved productivity and nutrients composition and in the same way, also increased HCN concentration of sorghum Super-2 varieties.

Production Performance, Egg Quality, and Fecal Bacterial Population of Laying Ducks Fed Ration Supplemented by Bamboo Vinegar J. Rattanawut; D. Trairabeap; S. J. Karrila; P. Rodjan; Y. Theapparat
Tropical Animal Science Journal Vol. 42 No. 3 (2019): 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.2019.42.3.224

With the ban on the use of antibiotics in poultry feed, it is required to produce alternative substances to maintain poultry health and performance. The present study was carried out to investigate the effects of dietary supplementation at various levels of bamboo vinegar (BV) on performance, egg quality, and fecal bacterial population of laying ducks. One hundred and five 50-week-old crossbred laying ducks (Khaki Campbell × Native) were randomly allocated into five treatment groups, each with seven replicates of three ducks. The experimental ducks were fed a basal diet (antibiotic-free diet) supplemented with BV at the levels of 0%, 0.2%, 0.4%, 0.6%, or 0.8% of diet until 62 weeks of age. For the overall period (from 50 to 62 weeks of age), the dietary supplementation of BV at the levels of 0.4% and 0.6% of diet increased egg production and egg mass, and improved feed efficiency of laying ducks (p<0.01). Supplementation of BV at the level of 0.8% in the diet decreased feed intake (p<0.01). Egg quality parameters were not significantly affected by supplementation of BV (p>0.05). The population of fecal Escherichia coli was significantly decreased in the experimental ducks fed diet supplemented with BV at the levels of 0.4%, 0.6%, and 0.8% compared to the control group (p<0.01), while the population of Lactobacillus spp. remained unchanged. The present results indicate that a level of 0.4% BV supplementation in laying duck diet is sufficient for reducing fecal E. coli and improves productive performance of egg laying ducks.

Validation of Analytical Method for Quantification of Egg Cholesterol Using Reversed Phase-High Performance Liquid Chromatography-Multiwavelength Detector Y. L. Maslukhah; D. N. Faridah; H. N. Lioe
Tropical Animal Science Journal Vol. 42 No. 3 (2019): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

In this research, analytical method of cholesterol content in eggs by Reversed Phase-High Performance Liquid Chromatography-Multiwavelength Detector (RP-HPLC-MWD) was validated. Our experiment validated the modified method of AOAC 994.10:2012 to get a more simple and efficient analytical method of cholesterol content. The sample was saponified using 10% KOH concentration for 15 min at 80 °C, then this analytical method was validated. RP-HPLC-MWD condition was at 100% MeOH as a mobile phase, flow rate of 1.0 mL/min, detection UV at 205 nm, cholesterol was detected at 10.38±0.13 min. As a result, the coefficients of determination for instrument and method linearities reached 0.9991 and 0.9912, respectively. The limits of detection and quantification of RP-HPLC-MWD instrument were found at 5 and 10 μg/mL, respectively, while the method-detection limit and quantification limit were 250 and 500 μg/g sample, respectively. Recovery values for the cholesterol analysis ranged from 98.62% to 112.26%, with a precision of 1.05%‒3.90%. Additionally, intralab reproducibility was known to reach 3.27%. This validated method can be applied for the analysis of cholesterol in various eggs available in the market.

Improvement of Bovine Split Hide Gelatin Quality by Addition of Soy Protein Isolate Using Transglutaminase Enzyme D. Wulandari; Y. Erwanto; Y. Pranoto; Rusman Rusman; R. Yuliatmo
Tropical Animal Science Journal Vol. 42 No. 3 (2019): 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.2019.42.3.237

Bovine split hide is the subcutis layer with the low percentage of collagen so that the quality of the gelatin is different from that of the gelatin from cattle’s skin. This study aims to improve the characteristics of bovine split hide gelatin combined with soy protein isolate (SPI) using transglutaminase (TGase) enzyme as a protein cross-linking agent. The study was conducted using a completely randomized design with 3 x 3 factorial pattern consisting of three levels of a mixture of bovine split hide gelatin : SPI at the ratios of 90 : 10, 80 : 20, 70 : 30, and three concentrations of transglutaminase enzyme, i.e. 10, 20, and 30 U. The results showed that treatments significantly affected viscosity, gel strength, the moisture, ash, fat, and protein content of gelatin. Electrophoresis of gelatin protein showed bands distribution between 60-190 kDa. The amino acid profile of the gelatin was similar to that of collagen with a high level of aspartate, glutamate, cysteine, and proline. Morphology of gelatin was observed by Scanning Electronic Microscope (SEM) and showed a compact distributed collagen crosslink. The combination of gelatin bovine split hide and SPI at the ratio of 90 : 10 provides the best physicochemical characteristic.

The Impact of External and Internal Factors on the Dairy Farmer’s Household Economics J. Atmakusuma; B. M. Sinaga; N. Kusnadi; I. K. Kariyasa
Tropical Animal Science Journal Vol. 42 No. 3 (2019): 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.2019.42.3.245

Domestic milk production is currently only able to meet 20% of the total domestic demand of milk, but this opportunity has not been responded well by dairy farmers. The objectives of this study were: (1) to analyze the performance of dairy farmers and (2) to analyze the impact of external factors (concentrate feed and milk prices) and internal factor (marginal productivity of concentrate feed) on production, income, and household welfare of dairy farmers. The number of sample households was 97 cooperative-member farmers and 46 cooperative-nonmember farmers in Lembang, West Java. The analytical method used included descriptive analysis and household economic models in the form of simultaneous equations. The results of the study showed that the scale of small-scale business with the percentage of lactating cattle and dairy farmers’ productivity was still low. When the price of concentrate feed rises, the impact of the policy of increasing milk prices is greater than the increase in the marginal productivity of concentrate feed on increasing business income and household welfare of dairy farmers.

Reproductive Performance of Female Kacang Goats Supplemented by Mineral Under a Tethering Feeding System Khalil Khalil; A. Bachtiar; Evitayani Evitayani
Tropical Animal Science Journal Vol. 42 No. 3 (2019): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, Bogor Agricultural University

Inadequate feed intake and nutrient supply are associated with the suboptimal reproductive performance of Kacang goats reared using a traditional tethering system in the Pariaman region of Indonesia. The objectives of this study were to (i) identify reproductive problems in tethered female Kacang goats, (ii) assess crude nutrient and mineral composition of feed consumed by tethered goats, and (iii) evaluate the beneficial effects of mineral supplementation on reproductive performance of tethered female Kacang goats. A field survey was carried out in Pariaman City and the Padang Pariaman Regency to collect data on reproductive performance as well as blood mineral and hematological profiles of tethered female Kacang goats. Forage and feed samples were collected and analyzed for dry matter (DM), crude protein (CP), and minerals (Ca, P, Mg, Fe, Cu, and Zn) contents. Feed was formulated with supplemented complete minerals in either block form or mixed with feed. A total of 15 young female Kacang goats received feed without supplement (P0, n=5), or mineral supplement with feed (P1, n=5), or in a manually prepared block lick (P2, n=5). Parameters measured included body weight, number of pregnant goats, blood mineral concentrations, hematological parameters, total protein concentrations, and progesterone concentrations. Results of the field survey showed that the age of maturity of female Kacang goats reared under a tethering system ranged between 5 and 9 months and the first kidding occurred between 12 and 23 months. The suboptimal reproductive performance of female Kacang goats raised using a tethering system was closely related to the inadequate feed intake and nutritional deficiency. Supplementation with minerals is an effective method to enhance nutritional status and health to increase pregnancy rate of tethered female Kacang goats.

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Prof. Dr. Ir. Komang G. Wiryawan

Contact Email kgwiryawan@yahoo.com

Phone +622518421692

Journal Mail Official mediapeternakan@apps.ipb.ac.id

Editorial Address Faculty of Animal Science Building, IPB University (Bogor Agricultural University) Jln Agatis, Kampus IPB Darmaga, Bogor 16680, Indonesia

Location Kota bogor, Jawa barat INDONESIA

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Contact Name
Prof. Dr. Ir. Komang G. Wiryawan

Contact Email
kgwiryawan@yahoo.com

Phone
+622518421692

Journal Mail Official
mediapeternakan@apps.ipb.ac.id

Editorial Address
Faculty of Animal Science Building, IPB University (Bogor Agricultural University) Jln Agatis, Kampus IPB Darmaga, Bogor 16680, Indonesia

Location
Kota bogor,

Jawa barat

INDONESIA