Judul: Kinerja Produksi Ikan Sidat Anguilla bicolor bicolor Diberi Pakan Berprotein 38,5%, 42,5%, dan 46,5% pada Sistem Kolam Air Mengalir
Abstrak: Eel is a commodity that high value and favored international markets, but production still can not fill market demand. The problems most often occur in the cultivation of eels is on a slow growth, high feed conversion, and low survival rates. The problems affecting the production performance is by increasing maintenance time and cost of production. Fish feed is an important factor in cultivation. Feeding with appropriate levels of protein is expected to increase growth so as to reduce production costs and improve production performance. This study uses a completely randomized design with treatments of feed that has a different protein content, i.e. 38.5%, 42.5%, and 44.5%, respectively repeated 2 times. Fish reared in concrete ponds dimensions 2 m x 2 m x 1.8 m as many as six in a pool of water flowing at the rate of 30 L/min. Eel fish used have a weight of 65.3 ± 2.73 g/fish with a density of 10 kg/m3. Feed given 4 times a day, ie at 05.00, 11:00, 16:00 and 21:00 are at satiation method. Fish maintained for 30 days with sampling every 15 days. Parameters used include survival, growth rate, diversity coefficient weights, feed conversion and water quality. The results showed differences in the protein content of the feed did not significantly affect survival, and diversity coefficient, but the real effect on the growth rate, feed intake and feed conversion. The best treatment (P<0.05) is the feed with protein content of 46.5% resulted in a 0.63% growth rate and ratio feed conversion of 2.18.
Keyword: eel fish, ratio feed conversion, growth, protein content

Judul: Kinerja Produksi Elver Ikan Sidat Anguilla bicolor bicolor Berbobot Awal 3 g/ekor dengan Padat Tebar 2 g/L, 3 g/L, dan 4 g/L dalam Sistem Resirkulasi
Abstrak: Eels are one of the potential aquaculture commodities but the production technique has not been developed yet. The purpose of this research was to analyze the production performance of eels elver Anguilla bicolor bicolor at different stocking densities: 2 g/L, 3 g/L, and 4 g/L. Initial weight was 3 g/fish. Fish cultured in recirculation system the survival rate and growth performance were observed for 40 days. The experiment was design used Completely Randomize Design (RAL) with 3 replications for each treatment. The data that were obtained consist of survival rate, speed growth rate, weight variance coefficient, and feed conversion ratio. Increasing stocking density enhanced growth performance and decreased the feed conversion. The results showed that the highest growth rate of biomass was produced by the stocking density of 4 g/L of 7.79 g/day compared to those of stocking density of 2 g/L of 3.71 g/day and stocking density 3 g/L of 6.40 g/day.
Keyword: stocking density, growth, Anguilla bicolor bicolor

Judul: Utilization of terra/MODIS L1B data for analysis of horizontal wind profile in the troposphere
Abstrak: This study was concerned with horizontal wind derived from data collected with the Moderate-resolution Imaging Spectroradiometer (MODIS) on board the NASA’s Earth Observation System (EOS)-Terra satellite. The aim of this study is to develop a method for the estimation of horizontal wind movement in the troposphere based on Navier-Stokes equation. The method was applied to a calibrated and geolocated Terra/MODIS L1B 1 km data set. The data inputs to estimate surface temperature are retrieved from TIR (Thermal Infrared) bands 31 (10.780 μm to 11.280 μm) and 32 (11.770 μm to 12.270 μm). The obtained surface temperatures were later used to approximate geopotential height on a constant-pressure surface by using the modified Poisson equation. The main assumptions used are the hydrostatic equilibrium, ideal gas law, constant lapse rate and constant acceleration of gravity. Based on the distribution of geopotential height, the pressure gradient force is measured by the gradient of geopotential on an isobaric coordinate to present the horizontal wind profile. For certain topographic areas especially in the mountain ranges, there was a disadvantage of using pressure as a vertical coordinate which lead to inaccuracy. In spite of that, Terra/MODIS L1B data with 1 km spatial resolution can be used to estimate the horizontal wind movement in the troposphere.
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