Judul: Addition of Chicken Pancreas Extract to Siamese Catfish Feed in Increasing Feed Efficiency and Reducing Organic Waste into Waters
Abstrak: Pemeliharaan ikan patin siam menggunakan pakan buatan, mengalami permasalahan pertumbuhan dan pencemaran kualitas air akibat penurunan kecernaan pakan. Penelitian ini bertujuan menganalisis dampak pemberian pakan predigestion dengan penambahan ekstrak pankreas ayam terhadap pertumbuhan dan buangan limbah organik ikan patin siam. Penelitian dilaksanakan pada bulan Maret hingga April 2022. Penelitian terbagi atas penelitian pendahuluan dan utama. Rancangan penelitian yang digunakan adalah rancangan acak lengkap (RAL) dengan empat perlakuan (kontrol, 3%, 6% dan 9) dan tiga ulangan. Hasil penelitian diperoleh perlakuan 9% memiliki nilai peningkatan parameter tertinggi meliputi bobot jantung sebesar 198,85%, insang sebesar 120,02%, usus sebesar 102,09%, efisiensi pakan sebesar 63,60% dan pertumbuhan sebesar 34,02% lebih besar dibandingkan kontrol sebesar 0%. Perlakuan 9% mampu menurunkan limbah sebesar 38,88% dari perakuan kontrol sebesar 0%.
Keyword: siam catfish, pancreatic extract, feed predigestion

Judul: Penambahan Ekstrak Pankreas pada Pakan untuk Mengurangi Limbah Organik pada Pemeliharaan Benih Ikan Nila (Oreochromis niloticus Linnaeus, 1758)
Abstrak: Upaya mereduksi limbah produksi dari kegiatan budidaya perairan perlu dilakukan antara lain dengan meningkatkan efisiensi pakannya. Salah satunya dengan penggunaan pakan predigestion yang telah ditambahkan ekstrak pankreas. Penelitian ini bertujuan untuk menganalisis dampak penambahan ekstrak pankreas ayam terhadap keragaan biometrik, efisiensi pakan, dan pertumbuhan benih ikan nila. Penelitian ini dilakukan dari bulan Maret hingga April 2022. Benih ikan nila sebanyak 120 ekor dibagi ke dalam 4 perlakuan berdasarkan konsentrasi enzim pada pakan (kontrol, 3%, 6%, dan 9%). Berdasarkan uji Anova didapatkan hasil bahwa nilai biometrik pada keempat perlakuan berbeda nyata. Nilai faktor kondisi berkisar 2,11-2,69, panjang usus relatif (PUr) berkisar 444,59-468,82%, bobot insang relatif (BIr) berkisar 6,43-11,19%, dan bobot viseral relatif (BVr) berkisar 24,89-25,79%. Hasil penelitian menunjukkan bahwa penambahan ekstrak pankreas ayam dapat meningkatkan nilai parameter biometrik, efisiensi pakan, pertumbuhan benih ikan nila secara signifikan, dan dapat mereduksi limbah organik sebesar 41,5%., Efforts to reduce production waste from aquaculture need to be carried out by increasing the feed efficiency. Furthermore, by using predigestion feed with pancreatic extract. This study aims to analyze the impact of chicken pancreatic extract on feed through biometric performance, feed efficiency, and growth of nile tilapia. This research was conducted from March to April 2022. This research used 120 nile tilapia and divided into 4 treatments based on the concentration of enzymes in the feed given (control, 3%, 6%, and 9%). Based on the Anova test, it was found that the biometric values in the four treatments were significantly different. Condition factor values ranged from 2.11-2.69, relative length of intestine (PUr) ranged from 444.59-468.82%, relative gill weight (BIr) ranged from 6.43-11.19%, and relative visceral weight (BVr) ranged from 24.89-25.79%. The results of the analysis showed that feed with the addition of chicken pancreatic extract had a significant effect on nile tilapia through biometric performance feed efficiency, growth, and reduce organic waste by 41.5%.
Keyword: Ikan nila, ekstrak pankreas, predigestion, Nile tilapia, pancreatic extract, predigestion

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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