Judul: Makanan Ikan Totot Johnius belangerii (Cuvier 1830) Di Delta Cimanuk Pabean Ilir Pasekan, Indramayu, Jawa Barat
Abstrak: Food could determines the survival, growth, and reproduction of fish. The purpose this study was to know the food type of belanger’s croaker in Delta Cimanuk Pabean Ilir Pasekan, Indramayu, West Java. This study were conducted on Maret-Mei 2014. Total samples analysed were 214 individuals. The stomach content was analyzed using index of preponderance (IP). The result of study showed that belanger’s croaker was carnivora with main food crustacean Acetes sp. as where small fish was more specialist the big fish. The opportunity a intraspesifik competition of croaeker belanger’s in food utilization occured between 92-115 mm and 116-139 mm for female fish, and between 68-91 mm and 92-115 mm and between 92-115 mm and 164-187 mm for male fish. The female fish was more diverse than the male fish in food utilization. Belanger’s croaker actively foraging during the day and actively foraging in water bodies near bottom waters.
Keyword: Bogor Agricultural University (IPB), Food., Delta Cimanuk, Belanger’s croaker

Judul: Aspek reproduksi ikan Totot (Johnius belangerii Cuvier, 1830) di perairan delta Cimanuk, Pabean Ilir, Pasekan, Indramayu, Jawa Barat
Abstrak: Belanger’s croaker (Johnius belangerii) is a fish from family Sciaenidae. This fishes have been many catching, it has economical values, and important ecological values in delta Cimanuk, Pabean Ilir. Research was conducted from August 2013 until December 2013 to determine some reproductive aspects of J. belangerii. Samplings were carried once a month using gillnet with mesh size 1-3 inches. Total of J. belangerii were caught is 258 individuals with ranged from 83-186 mm in length. Result showed that sex ratio of J. belangerii (males: females) was 1:4,13. First maturity in length of female and male were 136-156 mm and 159-170 mm. The reproductive season was from October to December. Fecundity varied from 11.554 to 87.855 eggs and it has positive correlation with length of fish. Reproductive type of J. belangerii could be grouped to total spawner with the size of egg diameters were 0,015-0,048 mm.
Keyword: reproductive, Johnius belangerii, Delta Cimanuk, Bogor Agricultural University (IPB)

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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