Judul: Pengaruh pemberian Artemia, tepung hati sapi dan campuran keduanya, sebagai pakan awal terhadap kelangsungan hidup dan pertumbuhan larva ikan Mas (Cyprinus carpio L.)
Abstrak: Suatu penelitian mengenai pakan larva ikan mas telah berlangsung dari tanggal 27 Januari hingga 20 Februari 1993 di Laboratorium Bioteknologi Budidaya Perairan, Kolam Percobaan Babakan, Dramaga, Bogor. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian Artemia, tepung hati sapi dan campuran keduanya terhadap pertumbuhan dan kelangsungan hidup larva ikan mas (Cyprinus carpio L.) dalam upaya mendapatkan pakan alternatif selain Artemia. Pemeliharaan larva dilakukan di dalam akuarium kaca berukuran 20 x 20 x 20 cm³ yang berisi media air sebanyak 3 6 liter. Seluruh akuarium ditempatkan pada bak papan berlapis plastik hitam yang telah dilengkapi dengan thermostat dan air lift pump. Setiap wadah ditebari larva ikan mas berumur 3 hari dengan kepadatan 100 ekor per wadah. Bobot dan panjang rata-rata larva pada saat penebaran adalah 0.001695 gram dan 0.685 cm. Pakan yang diberikan terdiri atas 2 macam yaitu Artemia dan tepung hati sapi. Adapun kebutuhan masing- masing jenis pakan adalah 200% bobot biomassa per hari untuk pemberian Artemia dan 40% bobot biomassa per hari untuk pemberian tepung hati sapi. Dalam keadaan kering tingkat pemberian kedua jenis pakan ini setara. Rancangan percobaan menggunakan Rancangan Acak Lengkap dengan lima perlakuan dan tiga kali ulangan. Perlakuan tersebut berupa proporsi pakan yang berbeda, yakni pemberian hanya Artemia saja (Artemia 100% atau Perlakuan A), campuran Artemia 75% dan tepung hati sapi 25% (Perlakuan B), campuran Artemia 50% dan tepung hati sapi 50% (Perlakuan C), Artemia 25% dan tepung hati sapi 75% (Perlakuan D) serta hanya tepung hati sapi saja (tepung hati sapi 100% atau Perlakuan E). Hasil penelitian menunjukkan bahwa nilai pertumbuhan panjang mutlak, laju pertumbuhan harian individu dan kelangsungan hidup larva ikan mas yang diberi pakan hanya Artemia, yaitu masing-masing sebesar 0.725 cm, 13.69% dan 100%, lebih tinggi dan berbeda nyata dibandingkan dengan larva yang hanya diberi tepung hati sapi saja, yaitu masing-masing sebesar 0.388 cm, 8.36% dan 91%...dst
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Judul: Pemberian Pakan Campuran pada Larva Ikan Patin
Abstrak: Artemia as live feed of stripped catfish larvae has a high price and tend to increase in time. The objective of this research is to find out the most optimum combination of artemia and compound feeding for stripped catfish larva survival and growth. Five thousand catfish larvae were stocked in glass aquarium with the size 90x40x40 cm3 and 50 larvae in glass aquarium 20x10x15 cm3. Combination feeding experiment consisted of 77.19 g artemia as a control; 77.19 g of artemia and 27 mL of compound feed (treatment I); 57.89 g of artemia and 33.75 mL of compound feed (treatment II); and 38.59 g of artemia and 40.5 mL of compound feed (treatment III). Survival rate of larvae on day 3th was 71.67%; 60.00%; 65.00%; and 31.25% respectively. While larva survival on 18 days was 50.27%; 34.50%; 53.33%; and 31.23% respectively. During the three days of experiment on survival, treatment III showed significanly lower survival. Absolute larvae length on 3 days experiment was 0.69 cm; 0.70 cm; 0.64 cm; and 0.59 cm respectively. Absolute larvae length the treatment was not significanly diffirent from each other, except for treatment III. Absolute larvae length in 18 days experiment was 1.52 cm; 1.40 cm; 1.51 cm; and 1.42 cm respectively. Combination of artemia and compound feed had an effect on survival rate. Compound feed could not totally replace artemia as a live feed, however it can be used as a complement feed.
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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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