Judul: Budidaya Cacing Oligochaeta dengan Padat Penebaran Berbeda pada Sistem Sirkulasi dengan Pergantian Air
Abstrak: Oligochaeta worm contain protein of 65%, fat 15%, and carbohydrate 14%, therefore very well when given to the fish larvae during nursery period. But, the availability of oligochaeta worm are very limited especially in Belitung which has 10 hatchery. So that, it needs oligocheta worm cultivation to meet the demand. The research used closed system which mean wasted water from. The purpose of this research to determine the best stocking denstiy of oligochaeta worm between 2600,3600, and 4600 indvidual/m2 with the system based on the biomass, growth rate,and economic efficiency. The research was perfomed in April until August 2011 at the Balai Benih Ikan Air Tawar Belitung Timur. The medium used are a mixture of fine mud and chicken manure. The worm was spread and fermentation manure chicken fertilized added every day about 1 kg/m2. The worm was cultured during 60 days and took as samples every 10 days. The observation indicated that the maintanence of oligocaeta worm with closed system produced the level of ammonia contain was higher and dissolve oxygen contai was lower than using opened system. In this condition, the worm was able to survived even thought feeding habit and reproduction is inhibited. Highest population and biomass occured on 50th day with stocking density 4600 individual/m2 as much as 255091.61 individual/m2 and 1275.46 g/m2. Highest biomass growth rate occured in 4600 individual/m2 as much as 25.05 g/m2/day. Stocking density 4600 individual/m2 got the profit as much as Rp 5 828 525, R/C ratio 1.04, PP for 6.13 years, BEP (Rupiah) Rp 154 585 260 and BEP (units) 937 kg, and HPP Rp 72 389.
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Judul: Produktivitas Budidaya Cacing Sutra (Oligochaeta) dalam Sistem Resirkulasi Menggunakan Jenis Substrat dan Sumber Air yang Berbeda
Abstrak: Tubificid worm have been used as live food which is important for ornamental fish production as well as other fish hatchery. This is because it has high protein content up to 52,49%. Many research have been done regarding tubificid culture, the result however still lower than that of natural production. The aim of this research was to increase productivity of tubificid worm in a recirculation system by using different types of substrate and source of water. This researching consisted of 4 treatments, i.e. ground water with sand substrate (SP), ground water with mud substrate (SL), catfish culture effluent with sand (LP), and catfish culture effluent with mud (LL). The research was done from May to August 2011 at Cibanteng, Laboratory of Fish Environment, and Laboratory of Fish Nutrition. Cultivation media was made by mixing the substrate and fermented chicken manure at ratio 1:1 , which drown in 2 cm height of water level. After 10 days drown the worm was stocked at 69 gram/m2. Culture period occurred was 60 days with addition of manure every 15 days. Biomass sampling was done every 15 days. The result of this research showed that biomass of worm cultured in LP medium is higher than in SP, SL, and LL, whereas in LL is the lowest biomass. Biomass growth of the worm in all treatment was significant at day 45th and 60th , where as the highest biomass (89,56 gram/m2) reached at day 45th on LP treatment.
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Judul: Faktor-Faktor Komunikasi Organisasi yang Berhubungan dengan Motivasi Berkarir dalam Jabatan Fungsional Arsiparis.
Abstrak: Motivasi merupakan faktor penggerak seseorang untuk berupaya mencapai tujuan. Arsiparis sebagai pejabat fungsional harus mampu memelihara stabilitas motivasinya dalam upaya mencapai tujuan karir.
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