Judul: Kelangsungan Hidup dan Pertumbuhan Juvenil Ikan Kakap Putih (Lates calcarifer) Dipelihara pada Media Air Hijau, Wadah Gelap dan Transparan
Abstrak: Barramundi’s cultivation is still constrained by the insufficient of barramundi’s fry for aquaculture production. Size 1-2 cm of barramundi’s fry has a greater risk of mortality than the other size. Most of the deaths are caused by cannibalism. The aims of this research were to examine the survival and growth rate of barramundi’s juvenile as fry with green water system, dark condition and transparent containers treatment. The size of the barramundi’s juveniles that used in this research were 1-2 cm and the average of weight were about 0.24±0.08 g, the density for each treatment was 1.000 fish/m3. The barramundi was feed by at satiation method for 3 times/day with crumble feed. The results showed that the green water system, dark condition and transparent containers treatment have survival rate, growth rate, feed conversion ratio, and the amount of consume feed did not differ significantly, but the absolute growth length was differ significantly for each treatment. The best treatment in this reseach was the green water system and transparent containers treatment. Glucose levels of barramundi’s blood tend to increased in the first 10 days and oxygen consumption rate in the 30 days was continues to decline in all treatments.
Keyword: 

Judul: Kelangsungan hidup dan pertumbuhan ikan kakap ( Lates calcarifer, Bloch ) putih umur 15- 45 hari pada berbagai tingkat salinitas
Abstrak: Penelitian ini dilaksanakan di Balai Budidaya Laut, Lampung pada tanggal 1 April sampai 10 Mei 1989, dengan tujuan untuk melihat pengaruh perbedaan tingkat salinitas media pemeliharaan bagi kelangsungan hidup dan pertumbuhan ikan kakap putih umur 15 45 hari. Dalam penelitian ini digunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 3 ulangan. Masing-masing perlakuan adalah salinitas media 5, 15, 25 dan 35 gr/kg. Ikan uji yang digunakan adalah ikan kakap putih berumur 15 hari dengan ukuran rata-rata panjang total 6.0 mm dan padat penebaran tiap wadah 2 ekor/liter. Wadah yang digunakan ada- lah 12 buah ember plastik berkapasitas 30 liter dan masing- masing wadah diisi air 25 liter. Makanan yang diberikan adalah nauplius Artemia selama ikan berumur 15 30 hari, nauplius Artemia bergantian dengan daging udang yang dihaluskan selama ikan berumur 31 35 hari dan udang yang dihaluskan saja selama ikan berumur 36-45 hari. Pemberian makanan dilakukan dengan cara ad libitum dengan frekuensi 3 kali sehari selama ikan diberi makanan nauplius Artemia, 4 kali sehari selama pemberian makanan nauplius Artemia bergantian dengan daging udang dan 2 kali sehari selama ikan diberi makan daging udang yang dihaluskan saja. Setiap ha- Ari dilakukan pergantian air sekaligus penyiphonan 50% selama ikan diberi makan nauplius Artemia, sebanyak 80 % selama ikan diberi makan nauplius Artemia bergantian dengan daging udang dan selama pemberian makan daging udang saja.
Keyword: 

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
Keyword: