Judul: Evaluasi beberapa pakan komersial berdasarkan pertumbuhan retensi nutrien dan limbah yang dihasilkan pada pemeliharaan ikan mas(Cyprinus carpia L.)
Abstrak: Penelitian ini bertujuan untuk mengevaluasi beberapa pakan komersial berclasarkan pertumbuhan, retensi nutrien dan limbah yang dihasilkan pada pemeliharaan ikan mas (Cyprinus carpio L.). Penelitian ini dilakukan di lnstalasi Penelitian Perikanan Air Tawar Depok, pacla bulan Desember 1996 sampai bulan April l 997. Wadah penelitian yang cligunakan berupa tangkifiberglass bervolume 80 liter sebanyak 9 buah yang dilengkapi aerasi. Khusus untuk pengukuran daya cerna digunakan akuarium bervolume 25 liter sebanyak 9 buah. Air yang digunakan sebagai media pemeliharaan berasal clari air sumur yang telah diendapkan, dan diaerasi selama 24 jam. lkan uji yang digunakan adalah ikan mas yang diperoleh dari Parung dengan bobot antara 7,7-11,4 g per ekor dengan kepadatan 2 g/1 (16 ekor per tangki dan 5 ekor per akuarium). Pakan komersial yang digunakan sebagai perlakuan berupa pelet yang terdiridari pakan A, B, dan C. Kadar protein paka11 A adalah 29,34%, untuk pakan B 32,38 % dan 30,75 % untuk pakan C. Rasio energi protein masing-masing perlakuan adalah 9,22 (pakan A), 8,16 (pakan B) dan 8,28 (pakan C), dengan kac!ar fosfor masing-masing pakan adalah 2,01 % (A), 1,69% (B) dan 1,27% (C).
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Judul: Growth Performance of Common Carp Cyprinus carpio With Four Different Commercial Feeds
Abstrak: Pakan yang diberikan pada ikan mas harus memiliki kandungan nutrien yang dapat dicerna dengan baik oleh ikan mas sehingga ikan mas dapat tumbuh secara optimal. Penelitian ini bertujuan mengevaluasi kinerja pertumbuhan ikan mas (Cyprinus carpio) yang diberi pakan empat merek berbeda dengan kandungan protein yang sama. Penelitian menggunakan rancangan acak lengkap (RAL) dengan empat perlakuan dan tiga ulangan, yaitu pakan komersial A (27,88%), pakan komersial B (27,86%), pakan komersial C (27,94%), dan pakan komersial D (27,85%). Ikan mas yang digunakan memiliki bobot 13,27 ±0,01 g/ekor dengan padat tebar 15 ekor per akuarium, dipelihara selama 50 hari. Parameter yang diamati, yaitu rasio konversi pakan (RKP), tingkat kelangsungan hidup (TKH), jumlah konsumsi pakan (JKP), laju pertumbuhan spesifik (LPS), rasio efisiensi protein (REP), retensi protein (RP), retensi lemak (RL), dan average daily gain (ADG). Pemberian pakan D menunjukkan kinerja pertumbuhan pada ikan mas yang lebih baik dibandingkan dengan pakan lainnya., The feed given to common carp must contain nutrients that can be digested properly by common carp so that common carp can grow optimally. This study aims to evaluating the performance of common carp (Cyprinus carpio) growth when provided with four different brands of feed with the same protein content. The study used a completely randomized design (CRD) with four treatments and three replications, namely commercial feed A (27,88%), commercial feed B (27,86%), commercial feed C (27,94%), and commercial feed D. (27,85%). The common carp used weighed 13,27 ± 0.01 g/individuals with a stocking density of 15 individuals per aquarium, reared for 50 days. Parameters observed were feed conversion ratio (FCR), survival rate (SR), total feed consumption (TFC), specific growth rate (SGR), protein efficiency ratio (PER), protein retention (PR), fat retention (FR), and average daily gain (ADG). D feeding showed better growth performance in common carp compared to other feeds
Keyword: Kinerja pertumbuhan, Ikan mas, Pakan

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