Judul: Pengembangan Perikanan Kakap Putih (Lates calcarifer) di Kabupaten Mimika
Abstrak: Mimika is a regency in the southern part of Papua Province that has potencial barramundi resource. Local fisheries statistics shows that utilization of barramundi until 2005 is still not optimum. This research acsess about the development of barramundi fisheries in Mimika Regency based on biological, technical, social and economic aspects. The objectives of this research were (1) to determine the development opportunity of barramundi fisheries in Mimika Regency (2) to determine an appropriate and environmental friendly fishing technology of barramundi and (3) to determine the development strategy of barramundi fisheries in Mimika Regency. The research method used were the Schaefer surplus production model, bioeconomic Gordon–Schaefer model, suitable effort analysis, determination of fishing unit and analytical hierarchy process (AHP). The results showed that the estimated MSY for the fisheries was 8.348 ton/year. Opportunity at MSY condition was 6.807 ton/year while at MEY management was 6.553 ton/year. From this conclusion, the effort gillnet fishery was more appropriate and advantage than handline fishery. The gillnet becomes main priority for developing with a strategy of fishermen empowerment and cooperative between stakeholders for improving catch and fishermen income.
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Judul: Kelangsungan Hidup dan Pertumbuhan Juvenil Ikan Kakap Putih (Lates calcarifer) Dipelihara pada Media Air Hijau, Wadah Gelap dan Transparan
Abstrak: Barramundi’s cultivation is still constrained by the insufficient of barramundi’s fry for aquaculture production. Size 1-2 cm of barramundi’s fry has a greater risk of mortality than the other size. Most of the deaths are caused by cannibalism. The aims of this research were to examine the survival and growth rate of barramundi’s juvenile as fry with green water system, dark condition and transparent containers treatment. The size of the barramundi’s juveniles that used in this research were 1-2 cm and the average of weight were about 0.24±0.08 g, the density for each treatment was 1.000 fish/m3. The barramundi was feed by at satiation method for 3 times/day with crumble feed. The results showed that the green water system, dark condition and transparent containers treatment have survival rate, growth rate, feed conversion ratio, and the amount of consume feed did not differ significantly, but the absolute growth length was differ significantly for each treatment. The best treatment in this reseach was the green water system and transparent containers treatment. Glucose levels of barramundi’s blood tend to increased in the first 10 days and oxygen consumption rate in the 30 days was continues to decline in all treatments.
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Judul: Photosensor producing based on ferroelectric material of Ba0,5Sr0,5TiO3 doped by Ferrium Oxide (Fe2O3) on a P-Type Silicon Substate Si (100) applied as a digital camera with a single pixel image sensor
Abstrak: Thin film Ba0,5Sr0,5TiO3 (BST) doped with Fe2O3 was grown on p-type silicon substrate (100) using chemical solution deposition (CSD). It used the solvent 2-methoxyethanol with annealing temperature of 850°C and the doping treatment Fe2O3 of 2.5, 5, 7.5, 10 % of the mass formed BST. Pure BST had the highest absorption of 600 nm of light wavelength. Additions Fe2O3 moves highest absorption in the range of 560 nm. Fe2O3 addition was strengthening thin film sensitivity to the effects of light. In general, doping Fe2O3 10% was result the best absorbance and current-voltage of BST thin film. Electrical properties of thin films BST include dielectric, photoconductivity, and dissipation energy. Based on the current-voltage (I-V) analysis, pure BST and doped BST showed photodiode properties. Dielectric values obtained in the range from 23.32 to 243. Based on electrical conductivity data and energy dissipation, BST thin films have shown photodiode characteristics and are therefore suitable as light sensors. The image sensor in a digital camera is also a light sensor. This BST thin film has been scientifically proven to be a light sensor and also it can be applied as an image sensor. This is a novelty image sensor based on thin film Ba0.5Sr0.5TiO3.
Keyword: barium strontium titanate, thin film, photodiode, image sensor, digital camera