Judul: Pengaruh penggunaan berbagai pelindung terhadap kelangsungan hidup pascalarva udang galah (Macrobrachium rosenbergii de Man) dalam penampungan pada kepadatan awal 30 ekor per liter
Abstrak: Salah satu masalah yang dihadapi dalam usaha meningkatkan produksi budidaya udang galah adalah sifat kanibalisme udang tersebut. Beberapa cara untuk mengatasi masalah sifat kanibalisme ini adalah dengan penggunaan substrat alami berupa ranting pohon, kerikil, cangkang moluska atau tumbuhan air, yang berfungsi sebagai pelindung untuk bersembunyi pada saat ganti kulit. Tujuan penelitian ini adalah untuk melihat pengaruh penggunaan beberapa jenis pelindung pada kepadatan 30 ekor per liter terhadap kelangsungan hidup pascalarva udang galah (Macrobrachium rosenbergii de Man), dalam penampungan. Sebagai penunjang diukur pula laju pertumbuhan dari udang uji. Penelitian ini dilaksanakan di Laboratorium Pembenihan Udang Galah (LPUG), Pasar Minggu, Jakarta pertumbuhan dari udang uji. dari tanggal 16 April sampai dengan 7 Mei 1989. Udang yang digunakan pada awal penelitian ini berada pada stadia pascalarva, dengan bobot rata-rata 40 mg per ekor dan berasal dari Laboratorium Pembenihan Udang Galah (LPUG), Pasar Minggu Jakarta, dengan kepadatan awal 30 ekor per liter.
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Judul: Pengaruh penggunaan berbagai pelindung terhadap kelangsungan hidup pascalarva udang galah (Macrobrachium rosenbergii de Man) pada wadah penempungan dengan kepadatan awal limabelas ekor per liter
Abstrak: Penelitian ini dilakukan untuk mengetahui pengaruh berbagai bentuk pelindung yang disukai udang hingga dapat meningkatkan kelangsungan hidup. galah se- Tempat pelaksanaan adalah Laboratorium Pembenihan Udang Galah (LPUG) Pasar Minggu, Jakarta, dan waktunya dari bulan April sampai awal bulan Mei 1989. Pada penelitian ini digunakan rancangan acak lengkap (RAL) dengan empat perlakuan dan tiga ulangan untuk ap-tiap perlakuan. ti- Udang uji yang digunakan adalah hasil pembenihan di LPUG Pasar Minggu. Makanan diberikan berkadar protein 30% dalam bentuk remah yang dibuat di laboratorium pem- benihan tersebut. Pemberian makanan sampai sekenyangnya dilakukan pada pukul delapan pagi dan empat sore.
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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