Judul: Pathogen Inventory and Survival of Carp Soaked with the Addition of Post-Transportation Banana Stems
Abstrak: Salah satu hambatan pada kegiatan budidaya ikan mas adalah penyakit yang akan menurunkan produktivitas. Pemancingan Telaga Silet di Dramaga mengalami permasalahan berupa terjadinya kematian pada ikan mas yang ditransportasikan dari Gresik dan Sukabumi. Salah satu upaya yang dapat dilakukan yaitu dengan pemberian cacahan batang pisang ambon. Penelitian ini bertujuan untuk menguji efektivitas penggunaan cacahan batang pisang ambon terhadap kelangsungan hidup ikan mas pascatransportasi di Pemancingan Telaga Silet Dramaga, Bogor. Penelitian ini menggunakan ikan mas dengan bobot rata-rata 3,44±0,4 kg dan panjang rata-rata 46±0,3 cm. Penelitian ini terdiri dari kontrol dan perlakuan cacahan batang pisang ambon berdimensi 2×3 cm dengan dosis 5 g L-1. Perendaman dan pemeliharaan dilakukan selama enam minggu dengan pergantian cacahan batang pisang setiap dua minggu sekali. Hasil penelitian ini menunjukkan bahwa patogen yang ditemukan pada ikan mas pascatransportasi setelah diberikan cacahan batang pisang ambon terdiri dari ektoparasit Argulus sp., cendawan Saprolegnia sp., dan bakteri Aeromonas sp., Aeromonas salmonicida, Pseudomonas, Flavobacterium, dan Bordetella parapertussis., In common carp rearing activities, one of the obstacles can be disease which will reduce the value of its productivity. Silet Lake fishing in Dramaga is experiencing problems in the form of many deaths of carp transported from Gresik and Sukabumi. One effort that can be done is by giving chopped ambon banana stems. This study aims to determine the effectiveness of using chopped ambon banana stems on the survival of post-transport carp in Dramaga Lake Silet Fishing, Bogor. The average carp weight was 3.44 ± 0.4 kg and the average length was 46 ± 0.3 cm. This study consisted of control and treatment chopped ambon banana stems with dimensions of 2×3 cm at a dose of 5 g L-1. Soaking and maintenance were carried out for six weeks with the replacement of chopped banana stems every two weeks. The results of this study showed that the pathogens found in goldfish after transportation after being given chopped Ambon banana stems consisted of the ectoparasites Argulus sp., the fungus Saprolegnia sp., and the bacteria Aeromonas sp., Aeromonas salmonicida, Pseudomonas, Flavobacterium, and Bordetella parapertussis.
Keyword: banana stem, common carp, survival

Judul: Effectiveness of Ambon Banana Stems Extract for Motile Aeromonad Septicaemia Disease Prevention on Catfish Juvenile Clarias gariepinus
Abstrak: Bakteri Aeromonas hydrophila merupakan salah satu bakteri patogen penyebab penyakit yang umumnya menjadi ancaman penyebab kematian pada produksi ikan air tawar, seperti pada produksi ikan lele. Salah satu bahan fitofarmaka yang dapat digunakan untuk mencegah penyebab penyakit pada ikan adalah batang pisang ambon (Musa paradisiaca). Penelitian ini bertujuan untuk menguji efektivitas ekstrak seduh batang pisang ambon terhadap infeksi A.hydrophila pada benih ikan lele. Penelitian ini terdiri atas lima perlakuan dan tiga ulangan yang meliputi perlakuan kontrol - (tanpa perendaman ekstrak seduh batang pisang ambon dan tanpa diuji tantang A.hydrophila), kontrol + (tanpa perendaman ekstrak seduh batang pisang ambon dan diuji tantang A.hydrophila), konsentrasi perendaman ekstrak seduh batang pisang ambon 0,5%, 1%, dan 1,5%. Benih ikan lele dengan panjang rata-rata 2,41±0,22 cm dan bobot rata-rata 0,11±0,03 g direndam pada ekstrak seduh batang pisang ambon selama 30 menit dan dilakukan selama 7 hari. Uji tantang dilakukan pada hari ke-8 dengan melakukan perendaman benih ikan lele pada bakteri A.hydrophila (106 CFU/mL) selama 60 menit. Perendaman benih ikan lele pada ekstrak seduh batang pisang ambon dengan konsentrasi 0,5% memberikan tingkat kelangsungan hidup terbaik pasca uji tantang dengan bakteri A.hydrophila sebesar 78,53±5,69%. Hasil penelitian menunjukkan tingkat kelangsungan hidup benih ikan lele pasca uji tantang pada perlakuan ekstrak seduh batang pisang ambon 0,5% (78,53±5,69%) berbeda nyata (P<0,05) terhadap perlakuan kontrol positif (41,18±6,18%)., Aeromonas hydrophila is one of the pathogenic bacteria that cause disease which generally be a threat to cause death in freshwater fish production, such as catfish production. An alternative phyto-pharmacy ingredients that can be used to prevent disease of fish is ambon banana stems (Musa paradisiaca). This study aimed to test the effectiveness of ambon banana stems extract against A.hydrophila infection on catfish juvenile. This study consisted of five treatments and three repetitions that were control - (without immersed in ambon banana stems extract and without challenge test by A.hydrophila), control + (without immersed in ambon banana stems extract and with challenge test of A.hydrophila), concentrations of ambon banana stems extract were 0,5%, 1%, and 1,5%. Catfish juvenile with average length of 2,41±0,22 cm and average weight of 0,11±0,03 g were immersed in the extract of ambon banana stems for 30 minutes and carried out for 7 days. The challenge test was implemented on the 8th day by immersed the catfish juvenile in A.hydrophila bacteria (106 CFU/mL) for 60 minutes. The immersion of catfish juvenile in ambon banana stems extract by 0,5% concentrations provide the best survival rate post the challenge test with A.hydrophila bacteria as much as 78,53±5,69%. Research result shows that the catfish juvenile’s survival rate post challenge test of 0,5% (78,53±5,69%) ambon banana stems extract treatment is significantly different (P<0,05) to positive control (41,18±6,18%) treatment.
Keyword: Aeromonas hydrophila, ambon banana stems, catfish, survival rate

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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