Judul: Inventarisasi Parasit pada Benih Ikan Gurame dalam Kolam Terpal di Kecamatan Pengasih Kabupaten Kulon Progo Yogyakarta.
Abstrak: The objective of this research was to record the parasites (ectoparasite and endoparasite) in giant gourami which cultured in plastic lined pond system. Thirty fingerlings for each size ranges of 3-4 cm, 5-6 cm, and 10-11 cm were collected from plastic lined ponds in three different villages, Desa Mergosari, Desa Kemiri, and Desa Karang Tengah, Kecamatan Pengasih, Kabupaten Kulon Progo, Yogyakarta. The examination showed that there were 5 genera of ectoparasites found in gouramy fingerlings, namely Trichodina, Chilodonella, Dactylogyrus, Gyrodactylus, and Ichthyophthirius. The highest prevalent and parasite intensity were found in Trichodina in 5 – 6 cm sized fish which were 100% and 28 ind/fish, respectively. There was no endoparasite found in giant gouramy fingerlings during the examination period.
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Judul: Studi Histopatologi Insang, Usus Dan Otot Ikan Gurami (Osphronemus gouramy) Akibat Infestasi Parasit Protozoa Di Desa Carangpulang Dramaga Bogor
Abstrak: The aim of the research was to find out the histopathological lesions of gouranzy fish gills, intestines, and muscles from Carangpulang Village Bogor. Fifteen fishes about a year old wlere used as sample in this research. Histopathological examination was done by lzenzatoxiilin and eosin stain (HE). Microscopically, gill was the izostc ommon organ with pathological lesions. Gill was ofen infected by flagellum protozoa parrrsites, such as Ichthyobodo sp, Myxozoa (Hennegujla sp and Myxobolus sp) and unidentified protozoa. In intestines, no specijic pathological change was found, while in muscle tissue hyaline and vacuola degenerations as well as necrotic lesions were commonly detected. Based on all findings mentioned above, the lesion of gill fishes were inzcted by protozoa Ichthyobodo sp and myxozoa which can cause ichthyobodosis. Moreover, we suggest that a non infectious agent such as chemical polutans as one of the caused of oedema, telangiectasis and thickening of lamella of the gills.
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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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