Judul: Silase limbah hasil perikanan untuk pakan ikan mas (cyprinus carpio L.)
Abstrak: Penelitian ini di landasi oleh pemikiran untuk memanfaatkan limbah hasil perikanan menjadi produk yang me mp unyai nilai ekonomis, yaitu berupa silase, yang dapat menjadi pakan ikan alternatif. Tujuan penelitian ini adalah : (1). Mengembangkan formula pakan ikan dengan silase dari berbagai limbah hasil perikanan sebagai sumber protein. (2). Untuk mengetahui pengaruh silase limbah hasil perikanan terhadap pertumbuhan dan kelangsungan hidup ikan mas. (3) Menentukan silase limbah hasil perikanan yang paling baik sebagai pakan ikan mas. Percob aan uji respon ikan menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan, yaitu silase limbah udang, silase ikan rucah, tepung ikan, dan pakan komersial (sebagain kontr ol). Masing-masing perlakuan di ulang 3 kali. Uji respon dilakukan pada jenis ikan air tawar, yaitu ikan mas ( Cyprinus carpio L.). Bobot rata-rata individu ikan pada awal percobaan 1,83 g. Masa pemeliharaan ikan mas dilakukan selama 8 minggu dengan selang pengamatan 1 minggu. Selama pemeliharaan laju pertumbuhan harian berkisar antara 2,44 - 5, 58 persen (0,048 - 0,116 g/hari). Efisiensi pemberian pakan berkisar antara 22.01 - 23.57 persen, retensi protein ikan mas berkisar antara 16,17 - 16,52 persen, retensi Iem ak ikan mas berkisar antara 8,89 - 25,44 persen, sedangkan re tensi karbohidrat berkis ar antara 0,015 - 0,043 persen. Uji statistik me n unjukkan bahwa pengaruh perlakuan terhadap laju pertumbuhan dan efisiensi pemberian pakan adalah berbeda sangat nyata (p < 0, 01 ). Formula silase ikan rucah lebih baik bila dibandingkan dengan silase kepala udang dan tepung ikan, namun lebih rendah jika dibandingkan dengan pakan kontrol. ...
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Judul: Penggunaan tepung ikan mas dan silase ikan dalam ransum ikan mas
Abstrak: Penelitian yang bertujuan untuk mengetahui pengaruh pemberian makanan buatan dengan kandungan protein yang sama, tetapi dengan pengolahan bahan utama yang berbeda, terhadap pertumbuhan dan efisiensi makanan ikan mas telah dilakukan dari tanggal 5 Juli 1980 sampai dengan tanggal 30 Agustus 1980. Tempat penelitian di Stasiun Percobaan Cibalagung Bogor, pada kolam-kolam beton yang berukuran 4.5 m², dengan kedalaman air 0.4 m dan volume air 1.8 m². Ikan mas yang digunakan berukuran rata-rata 99.91 gram. Percobaan dilakukan dengan empat perlakuan dan empat ulangan dan rancangan percobaan yang digunakan ialah Rancangan Acak Lengkap (RAL). Perlakuan A adalah tepung ikan sebagai sumber protein utamanya, perlakuan B adalah silase ikan dengan proses kimia berasal dari ikan mentah, perlakuan C adalah silase ikan dengan proses kimia berasal dari ikan dimasak dan perlakuan D adalah silase ikan dengan proses biologi berasal dari ikan mentah. Pemberian makanan dilakukan tiga kali sehari yaitu pada pagi, siang dan sore hari sebanyak 3% dari berat total ikan.
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Judul: Characteristic of Overshooting Top (OT) Based on  Himawari  8  Satellite  as  a  Convective  Cloud  Feature  that  Generates  Extreme Weather in the Java Island Region
Abstrak: Overshooting Top (OT) is a feature at the top of a convective cloud that is associated with extreme weather. Research on OT in tropical Indonesia is still very limited. The existence of geostationary satellites with wide area coverage and fast frequency observations is useful for observing the fast dynamics of the OT life cycle. Therefore, this study intends to analyze the relationship between OT and extreme weather, updraft and thermodynamic conditions of OT when extreme weather occurs, the best objective method for detecting OT in the day time and night time, and the spatiotemporal distribution of OT in the tropical region of Java Island during the 2018-2021 period. Based on visual analysis using visible channel and Himawari 8 sandwich products, 87% of extreme weather events in Java were accompanied by the appearance of OT. It indicates that the presence of the OT pattern is a convection cloud pattern or feature that is closely related to extreme weather events for the Java Island region. The existence of a time lag between the appearance of OT and extreme weather events on Java Island indicates that the OT of convection cloud can be used as a precursor or nowcasting for the appearance of extreme weather. Most of the convective cloud OT features during extreme weather events on Java Island have altitude that were only able to exceed the altitude of the equilibrium level and few were able to exceed the tropopause level of 9 km – 16 km. The difference in atmospheric conditions during extreme weather events on Java Island, which is in the tropics and subtropics, is a strong and unstable convective energy condition characterized by a larger CAPE, as well as unstable KI, LI, SI and TTI values. It is offset by kinematic factors in the form of a weak vertical wind shear (bulk wind shear 0-6 km) and a higher freezing point height. The difference between extreme weather events in the Java Island region and other tropical regions compared to subtropical regions is the strong updraft speed of convection clouds. The IRW Texture COMB algorithm based on the IRW-Texture Gradient modification and the COMB algorithm shows a significant increase in quality for detecting OT and non-OT pixels in Java. Rainy days with rainfall > 50 mm/day are very common in areas with an altitude of > 500 m. On the other hand, the level of convection activity which is indicated by the presence of OT and lightning is significantly reduced in this area. OT of convective clouds appear more frequently during the DJF season and less frequently during the JJA season. OT often appears during the day time and rarely at night time. Most OTs appear in the central part, away from the south and north coasts of Java Island during the day, while OTs that appear near the south and north coasts of Java Island can appear in the morning or afternoon.
Keyword: convective clouds, extreme weather, Overshooting Tops, Himawari 8 Satellite