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匹配条件: “Lilik B. Prasetyo” ,找到相关结果约143734条。
Home range and movements of male translocated problem tigers in Sumatra
Dolly Priatna,Yanto Santosa,Lilik B. Prasetyo,Agus P. Kartono
Asian Journal of Conservation Biology , 2012,
Abstract: The ranging behaviour of translocated problem tigers is poorly understood. The demand for releasing problem tigers back to the wild increases following the increasing the number of problem tigers that needs to be rescued in Sumatra in the last decade. In this study we estimate the home range size and obtain information on daily range of four translocated problem tigers, as well as discussing some potential factors determining the size of home range and their movement. We translocated four adult males Sumatran tigers (Panthera tigris sumatrae) caught after killing domestic animals or rescued from traps set up by villagers for capturing deer and wild boar. The tigers were released following 16-225 days rehabilitation. All were fitted with global positioning system collars and released 74-1,350 km from their capture site. The length of time needed by each tiger for establishing home range was between 6 and 13 weeks. The home range size of each individual tiger estimated with 100% minimum convex polygon varies between 67.1 km2 and 400 km2, while estimations with a 95% fixed kernel methods were between 37.5 km2 and 188.1 km2. The difference in home range size established by each translocated tigers indicates the variability of the range size even within a subspecies. The maximum distance moved each tiger in one day was different, the range was 8.5-18.9 km. Although preliminary, these data may be useful for improving future translocation of problem tiger, as this study was the first ever conducted in Sumatra.
Bird Community in Burung Island, Karimunjawa National Park, Central Java
Biodiversitas , 2007,
Abstract: Burung Island is one of many islands in the Karimunjawa Islands that belong to Karimunjawa National Park conservation area. The purpose of this study is to discover the structure of bird community especially the species diversity and its habitat structure in Burung Island. The study was conducted on June 2006, November 2006, and June 2007 in Burung Island. The study was conducted by using point count method. The radius of each point is approximately 20 meters, while the time interval of observation on each count is 10 minutes. The distance between each point in this study is 100 m. The habitat observation was conducted by using habitat profile of tree cover vertical structure which was done descriptively by looking at the function of cover level to the present of bird or the relation between level and the present of bird in that location. The study’s result indicated that there are 15 recorded bird species from 10 family in the location, in which five species (five family) among them are protected by the government, which are Sterna sumatrana, Egretta sacra, Nectarinia jugularis, Caloenas nicobarica, and Falco moluccensis, and two of them were included in CITES (Convention on International trade in Endangered Species) appendices 1 and 2, which are Caloenas nicobarica and Falco moluccensis. The highest values of species diversity index (H’) and evenness index (E’) can be seen from the observation’s result of June 2007, which are 1.8837 and 0.836. The habitat of Burung Island is very suitable for Caloenas nicobarica, Egretta sacra, Sterna sumatrana, and Sterna bergii as a place for breeding. The use of vegetation level by bird in Burung Island is dominated by the use of low and base levels.
E. Prasetyo,Sunarso,P. B. Santosa,E. Rianto
Journal of the Indonesian Tropical Animal Agriculture , 2012,
Abstract: The aims of study were to analyze (i) income of beef cattle farming, (ii) ability of farmers to meet their obligation for returning credit, (iii) role of character, capacity, capital, collateral and conditions (5C) and its effect on credit return. The study was conducted using survey methods on farmers (fattening and cow-calf operation), who use credit. Sample location was determined using two stage cluster random sampling based on beef cattle population, namely region of Grobogan, Blora, Rembang, Wonogiri and Boyolali. Number of respondents was 50 for fattening and 50 for cow-calf operation. Data were analyzed by descriptive and inferential statistic, which consisted of scoring, income and multiple linear regression. Results showed that income per-year of beef cattle fattening was greater than cow-calf operation (IDR 8,954,208.00>1,606,786.00), as well as its contribution to the household farmers’ income (49.45>14.91%). Credit return ability was 61.35% based on amount of credit IDR 22,482,510. Five-C analysis resulted that character and capacity of farmers were in adequate category, while capital, collateral and condition were IDR 14,932,500.00, IDR 58,740,000.00 and IDR 14,440,600.00. Capital and collateral had significant effects, while character, capacity and condition had no significant effects on credit return.
E. Prasetyo,Sunarso,P. B. Santosa,E. Rianto
Journal of the Indonesian Tropical Animal Agriculture , 2012,
Abstract: This study was aimed : (i) to know the subsystem implementation and agribusiness planning in beef cattle fattening; (ii) to count the profit of beef cattle farming; (iii) to analyze the effect of agribusiness subsystem implementation and agribusiness planning to beef cattle fattening profit. This study was carried out using survey method and the elementary units were feedlot farmers. The sample was determined by Purposive Quota Sampling Method on 112 respondents spread across five regencies, namely Blora, Rembang, Grobogan, Wonogiri, and Boyolali. Data were collected from primary and secondary sources. The data analysis used quantitative descriptive and inferential statistics method, which include scoring, financial, and multiple linear regression analysis. The results showed that : (i) the implementation of agribusiness subsystem (including preproduction subsystem, marketing, and agribusiness support services) and agribusiness planning were not so good category, while the cattle farming subsystem was moderate category; (ii) the average of farming scale in each feedlot farmer was 2.95 head of cattle with the profit rate was IDR 1,044,719 per fattening period during 6.68 months (equivalent to IDR 156,395 per month); (iii) agribusiness subsystem and agribusiness planning had significant impact on feedlot farmer profit simultaneously, but preproduction subsystem and the agribusiness support services subsystem partially had a significant impact on feedlot farmer profit.
Teguh Prasetyo
Jurnal Dinamika Manajemen , 2013,
Abstract: This study aims to test theagency theory in Indonesian capital market wasproxiedbythe theagency conflicts controlling mechanism which are dividends, debtand institution alownership.The data is pooled data with the observation period from the year 2004-2010. The method of analysis used in this study is multiple regression analysis, and Two-Stages Least Square (2SLS). The results showthe dividend has a positive effect on performance an debt has negative effect. More over, institution alownership has a positive effect on performance. Meanwhile, Simultaneously relationship between the three models are not significant. However, the relationship between dividends and debt significant. It means that dividends can replace debt andvice versato control the agency conflict.
Fruit of plant diversity at home-garden of Jabon Mekar village, subdistrict of Parung, Bogor regency
Biodiversitas , 2007,
Abstract: Jabon Mekar village is well-known as the central of fruit supplayer at subdistrict of Parung. Many kinds of fruit were planted and developed in this area. Durian ‘lai-mas’ or durian jabon’s cultivar is the superior product of fruit. However it was estimated as a buffer zone of Jakarta and subject of the urban development. Due to the increasing number of the urbant development in Jakarta, it is concerned that this will have an effect to the function of home-garden.The aim of the research is to study the potential riches and fruit plant diversity at home-garden of community in the village of Jabon Mekar. The methods used for vegetation analysis were the quadratic method. The result of the research found 57 species of fruit plants from 41 genus, 23 families and 30 local cultivars. From all fruit of plants, there are 7 species as the main compositer of the community at home-garden i.e. Musa sp., Durio zibethinus, Nephelium lappaceum, Cocos nucifera, Artocarpus heterophyllus, Sandoricum koetjape, Carica papaya. It was found also that the diversity of plant species at home-garden was at the high level. While all fruit of plant species found a tendency SDR value under 50%, means that none of the plant species dominant toward other fruit of plants species.
Rehabilitation of Artisanal Mining Gold Land in West Lombok, Indonesia: 2. Arbuscular Mycorrhiza Status of Tailings and Surrounding Soils
B. Prasetyo,B. Dewi Krisnayanti,Wani Hadi Utomo,C.W.N. Anderson
Journal of Agricultural Science , 2010, DOI: 10.5539/jas.v2n2p202
Abstract: Artisanal mining plays an important role in the Indonesia economy; however, it has created serious environmental destruction. The prohibition of artisanal mining is not a wise policy and never works. A more valuable strategy is to encourage artisanal mining; however, the associated poor health, safety, and environmental conditions must be improved. Therefore, effective rehabilitation of the environment post mining is essential. Phytoremediation is considered to be one method to achieve this rehabilitation. In this method, the interaction of plant roots with mycorrhiza is one of the key determinants of successful rehabilitation. A study to identify the indigenous mycorrhiza present in soil was carried out at an artisanal gold mining region at Sekotong, West Lombok, Indonesia. Soil samples were collected from the rhizosphere of a selection of indigenous plant species for the identification of the associated mycorrhizal fungi. Rhizosphere samples were collected from a normal agricultural soil as well as waste rock and mine tailings. The plants studied were Acassia sp, Gmelina arborea, Leucaena glauca, Tectonia grandis, Manihot utilissima, and Zea mays. There was an abundance of mycorrhizal fungi species associated with all observed plants, with the dominant genus being Glomus. The spore density varied from 77 – 240 spores/100g in natural soils, with the percentage of infected roots varying from 10 to 40%, and decreasing as the soil was disturbed. Some of these mycorrhizal fungi showed a relatively good ability to grow in the heavy metal contaminated gold mine tailing.
Diversity and vertical distributions of scarabaeids dungbeetles (coleoptera: scarabaeidae) in the tropical mountaineous rainforest of gede pangrango national park, west java, indonesia
Biodiversitas , 2007,
Abstract: Diversity and vertical distributions of scarabaeids dungbeetles (Coleoptera: Scarabaeidae) were studied in a tropical mountaineous rainforest of Gede Pangrango National Park using dung traps. Samples were collected at four altitudes of 500-1000m, 1001-1500, 1501-2000, and 2001-2500m of five different collection sites (Cibodas, Selabintana, Situ Gunung, Bodogol, and Gunung Putri). 1052 individuals of 28 species of scarabaeid dungbeetles that belongs to five genus were collected. The most diverse groub was the genus Onthophagus, which consists of 21 species (75% of collected species) and followed by Copris with 3 species (10.7%), Paragymnopleurus with 2 species (7.1%), Catarsius with 1 species (3.6%), and Phacosoma with 1 species (3.6%). The Shanon-Winner index of diversity and evenness were gradually declining during the time when altitudes were increasing. Altitude was an important factor in the diversity, abundance, and distribution of dungbeetles. The diversity of dungbeetles at the interval of 1001-1500m and 1501-2000m were not so high but abundance and similarity were high. Diversity index, evenness, abundance, and species similarity of dungbeetles at the interval of 2001-2500m was low because of unfavourable habitat. Although the diversity of dungbeetles at the interval 500-1000m was the highest, however abundance and similarity index were relatively low. Analyse of diversity, abundance, evenness, and similarity of dungbeetles on each of the different altitudes and environment conditions were discussed in this paper.
Pengaruh Kadar TiO2 Terhadap Kekuatan Bending Komposit Serbuk Al/TiO2
Lilik Dwi Setyana,Toto Rusianto
Jurnal Teknik Mesin , 2005,
Abstract: Aluminum fine powder as the matrix and TiO2 as the reinforcement is known as Al/metal matrix composite, that can be produced by powder metallurgy. The research of Al/TiO2 MMC with various content of reinforcement was 0, 2, 4, 6 and 8% weight of TiO2. Green body was produced with variuos compacting pressures 400 and 500 MPa, then sintered at 550 oC for 5 hour. Optical and SEM were used to observe the microstructures. Mechanical properties of the specimens including Brinell hardness and modulus of rupture by four point bending. The results of the research show that Brinell hardness number, modulus of rupture and density of composites increases with increasing compacting pressure. The optimum properties were achieved on the composites containing 4% weight of TiO2 were modulus of rupture was 82 kg/mm2, hardness was 42 BHN and density 2.57 gr/cm3 with compacting pressure of 500 MPa. Abstract in Bahasa Indonesia : Aluminium serbuk sebagai matrik dan TiO2 sebagai penguat dikenal sebagai bahan komposit matrik logam (MMC), yang dapat diproduksi dengan teknik metalurgi serbuk. Dalam penelitian ini komposit Al/TiO2 dengan variasi penambahan unsur penguat sebesar 0, 2, 4, 6 dan 8% berat TiO2. Pembentukan green body dengan tekanan kompaksi 400 dan 500 MPa, dan proses sinter pada suhu 550 OC selama 2 jam. Pengujian meliputi uji bending dan kekerasan brinell, pengamatan srtuktur mikro menggunakan SEM dan mikroskop optik. Hasil penelitian menunjukan kekerasan dan kekuatan bending meningkat dengan meningkatnya tekanan kompaksi. Komposisi optimum dicapai pada komposisi Al/TiO2 4% berat, dengan kekuatan bending sebesar 82 kg/mm2 dan kekerasan 42 BHN pada pembentukan dengan tekanan kompaksi 500 MPa. Kata kunci: metalurgi serbuk, Al/TiO2, Komposit.
Pemanfaatan Tithonia Diversifolia pada Tanah Sawah yang Dipupuk P Secara Starter terhadap Produksi serta Serapan Hara N, P, dan K Tanaman Padi
Gusnidar,Teguh Budi Prasetyo
Jurnal Tanah Tropika , 2008,
Abstract: The research of Tithonia diversifolia utilization in the paddy soil that was fertilized P-starter on yield and N, P, K uptake on rice crop, has been conducted from August to December 2005. The objective of this research was to determine an interaction between P-starter levels, and tithonia levels on production and N, P, K element uptake of rice crop. The research was pot experiment in the green house in factorial design 4 x 4. First factor was 4 levels of tithonia with reduce dosage fertilizer applied (T0 = 0 t ha-1 of tithonia + 200 kg ha-1 of urea + 75 kg ha-1 of KCl ; T1= 2,5 t ha-1 of tithonia+ 150 kg ha-1 of urea , without KCl; T2 = 5,0 ton ha-1 of tithonia+ 100 kg ha-1 of urea , without KCl; dan T3 = 7,5 t ha-1 of tithonia + 50 kg ha-1 of urea, without KCl). The second factor was 4 levels of P-starter (0, 2, 4, and 6 kg P ha-1). The result showed that combination of T3 treatment and 2-4 kg P-starter ha-1 increased the grain yield 20,51-21,08 g pot-1 (18,65-19,21 %). Effect of T3 treatment was not significantly differences with T2 treatment on the grain yield. The best interaction was T3 treatment on N and K uptake (0,84 g pot-1 for N, dan 0,82 g pot-1 for K).

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