Judul: Isolation and Identification of Pathogenic Bacteria in Glass Eel Anguilla bicolor reared at the Department of Aquaculture, IPB
Abstrak: Eel (Anguilla bicolor) is a catadromous fish with high business prospects in the field of cultivation in both domestic and international markets. National eel production experienced a decline in 2020 by an average of 37.64%. A decrease in eel production can occur due to production failure due to disease. This research aims to isolate and identify pathogenic bacteria that cause disease and death in glass eel Anguilla bicolor kept at the Department of Aquaculture, IPB. This research method includes sampling, sample collection, observing clinical symptoms, isolating bacteria, identifying bacteria, examining bacteria through Polymerase Chain Reaction (PCR) analysis, and histopathology. The results of the research showed that there were 10 bacterial isolates that dominantly grew, including Aeromonas sp, Clostridium sp, Listeria sp, Bacillus sp, Staphylococcus sp, Eubacterium sp, Micrococcussp. Chromobacterium sp, Vibrio sp, and Plesiomonas sp. The five bacterial isolates were further tested using PCR and Aeromonas hydrophila bacteria were identified. Histopathology results showed pathological microanatomical changes in the gill, kidney, liver and intestine tissue showing necrosis, edema, congestion, telangiectasis and villous abnormalities. The dominant pathogenic bacteria found and potentially causing disease in glass eel rearing in the Aquaculture Department is Aeromonas hydrophila, characterized by clinical symptoms of redness of the gills and damage to several tissues such as the gills, liver, kidneys and intestines.
Keyword: Aeromonas sp, bacteria, histopathology, identification, eel

Judul: Bakteri Penyebab Penyakit Pada Ikan Sidat Anguilla Bicolor Bicolor
Abstrak: Penelitian ini bertujuan untuk mendapatkan isolat dan mengidentifikasi jenis-jenis bakteri penyebab penyakit pada ikan sidat Anguilla bicolor bicolor. Penelitian ini dilakukan dalam dua tahap. Tahap pertama meliputi isolasi dan identifikasi ikan sidat kondisi sakit stadia glass eel yang berukuran panjang rata-rata 5±0,5 cm dan bobot rata-rata 0,5±0,08 g, pengamatan bentuk morfologi koloni dan morfologi sel, karakterisasi fisiologi dan biokimia bakteri, serta uji hemolisis dan identifikasi jenis bakteri dengan KIT API. Tahap kedua yaitu uji postulat Koch pada ikan sidat kondisi sehat stadia elver yang berukuran panjang rata-rata 15±0,65 cm dan bobot rata-rata 3±0,75 g. Hasil penelitian memperoleh tiga jenis bakteri dominan yang diduga sebagai penyebab penyakit pada ikan sidat, yaitu Aeromonas hydrophila, Streptococcus agalactiae dan Listeria grayi. Uji postulat Koch membuktikan bahwa bakteri Aeromonas hydrophila dan Streptococcus agalactiae bersifat virulen pada ikan sidat Anguilla bicolor bicolor.
Keyword: Anguilla bicolor bicolor, bakteri, A. hydrophila, S. agalactiae

Judul: Penentuan Harga Opsi Put Amerika dengan Simulasi Monte Carlo
Abstrak: An American option is an option that can be exercised at the strike price anytime before or on the date of expiration. In this thesis, Monte Carlo simulation for valuation of American option is presented. Monte Carlo simulation is one of the numerical methods used to determine the price of American options. The simulation provides several examples of initial stock price , rate of interest , exercise time , volatility , and strike price K. The simulation study shows the cost of the option c decreases when S increases, c decreases when r increases, c increases when T increases, c increases when  increases, and c increases when K increases.
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