Judul: Aplikasi Probiotik, Prebiotik dan Sinbiotik Melalui Pakan untuk Pencegahan Infeksi Aeromonas hydrophila pada Ikan Mas Cyprinus carpio
Abstrak: Penyakit motile aeromonad septicemia (MAS) merupakan kendala yang sering dialami dalam budidaya ikan mas. Salah satu alternatif yang dapat dilakukan untuk mengatasi kendala tersebut yaitu dengan aplikasi probiotik, prebiotik dan sinbiotik. Penelitian ini bertujuan untuk menguji efektivitas pemberian bakteri probiotik, prebiotik dan sinbiotik terhadap kelangsungan hidup dan pertumbuhan ikan mas yang diinfeksi dengan A. hydrophila. Sebanyak 15 ekor ikan mas dengan bobot rata-rata 5,09±0,09 g dipelihara di akuarium dengan volume 96 L. Perlakuan yang diberikan yaitu kontrol negatif (K-), kontrol positif (K+) tanpa penambahan probiotik, prebiotik dan sinbiotik, perlakuan penambahan 1% probiotik (A), perlakuan penambahan 2% prebiotik (B) dan perlakuan penambahan sinbiotik (C; 1% probiotik dan 2% prebiotik). Setelah 30 hari, semua perlakuan (kecuali K-) diuji tantang dengan menyuntikkan A. hydrophila sebanyak 100 μL/ekor pada konsentrasi 107 CFU/ml secara intramuskular dan diamati mortalitasnya selama 14 hari. Hasil penelitian menunjukkan bahwa penambahan sinbiotik memberikan kelangsungan hidup yang lebih tinggi (100%) dibandingkan dengan perlakuan kontrol positif (45,83%) serta memberikan pengaruh yang lebih baik terhadap pertumbuhan ikan mas.
Keyword: Aeromonas hydrophila, ikan mas, probotik, prebiotik, sinbiotik

Judul: Aplikasi Prebiotik dengan Dosis Berbeda Melalui Pakan untuk Pencegahan Infeksi Aeromonas hydrophila pada Ikan Mas Cyprinus carpio
Abstrak: Penyakit motile aeromonad septicemia (MAS) yang disebabkan oleh infeksi bakteri Aeromonas hydrophila merupakan kendala yang sering dialami dalam budidaya ikan mas. Salah satu pencegahan yang dapat dilakukan adalah dengan menggunakan prebiotik. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian prebiotik dengan dosis berbeda melalui pakan terhadap kinerja pertumbuhan dan gambaran darah ikan mas yang diinfeksi A. hydrophila. Sebanyak 15 ekor ikan mas dengan bobot 4,94±0,32 g dipelihara dalam akuarium berukuran 80x60x40 cm3 dengan volume 96 liter. Perlakuan yang diberikan yaitu kontrol negatif (K-), kontrol positif (K+), prebiotik 0,5% (A), prebiotik 1% (B) dan prebiotik 2% (C). Setelah 30 hari pemeliharaan, setiap perlakuan (kecuali K-) diuji tantang dengan injeksi A. hydrophila sebanyak 0,1 ml/ekor pada konsentrasi 107 CFU/ml secara intramuskular kemudian diamati mortalitasnya selama 14 hari. Hasil penelitian menunjukan bahwa penambahan prebiotik 2% memberikan hasil terbaik dengan kelangsungan hidup (100%), laju pertumbuhan harian (2,71%), konversi pakan (1,36) serta gambaran darah yang lebih baik pada sebelum dan pasca injeksi A. hydrophila.
Keyword: Aeromonas hydrophila, hematologi, ikan mas, prebiotik

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