Judul: Pertumbuhan dan Reproduksi Induk Ikan Maanvis Disuntik Hormon Pertumbuhan Rekombinan Ikan Kerapu Kertang Dosis Berbeda.
Abstrak: Maanvis (Pterophyllum scalare) is an ornamental fish favored by fish lover, however the small market size makes the market is not growing. The purpose of this study was to examine the effect of recombinant giant grouper growth hormone (rElGH) injection on the growth and reproduction of the maanvis broodstok. Broodstok was injected with rElGH at a dose of 0.05, 0.5, 5.0, and 50 μg/g body weights. As control, fish was injected with 100 mL phosphate buffer saline. Results showed that highest absolute body weight growth in male (6.2±2.63 g) and female (3.8±1.71 g) was obtained in injection dose of 0.5 μg/g. In the male broodstock injected with rElGH at dose of 0.5 μg/g had the highest absolute growth of standard body length (4.6±1.92 mm), while the female (5.7±7.218 mm) was at dose of 0.05 μg/g. Spawning frequency was highest in the control treatment. Injection dose showed a negative correlation with the frequency of spawning, while at the interval spawning, hatching and survival rates showed various results.
Keyword: Growth, Pterophyllum scalare, recombinant growth hormone, reproduction

Judul: Penentuan Dosis Perendaman Hormon Pertumbuhan Rekombinan Ikan Kerapu Kertang pada Pascalarva Udang Galah
Abstrak: This research was conducted to determine the immersion dose of recombinant giant grouper growth hormone (rElGH) that generates high growth performance in giant freshwater prawn. The study was consisted of 5 treatments with three replications. Those were immersion dose of 0.15 mg/L, 1.5 mg/L and 15 mg/L. As control post larval-35 (PL-35) was without treatment (control-1) and PL-35 was immersed in water containing 100 mg/L bovine serum albumin (BSA) without rElGH (control-2). In amount of 30 PL-35 for each treatment were bath immersed for 1 hour in a plastic packing containing 200 mL of water and 100 mg/L BSA. PL were further maintained for 12 weeks in the 30-L glass aquarium and fed flake form of commercial diet 3 times daily, at satiation. The results showed that the highest of biomass (58.77±1.98 gram), specific growth (6.85±0.01 % per day), average body weight (1.09±0.01 gram) and average total body length (5.09±1.01 cm) were obtained in 15 mg/L dose of treatment (p<0.05). Biomass of the prawn in 15 mg/L immersion dose was approximately 79.9% higher than control-1 (32.67±1.45 gram). Survival of prawn in all treatment and controls were similar (p>0.05). The prawn immersed with rElGH at a dose of 15 mg/L had 9.55% lower protein content, while lipid content was 6.33% higher than control. Thus, the immersion of PL in 15 mg/L rElGH could increase the growth of giant freshwater prawn, and can be useful to increase the aquaculture production.
Keyword: biomass, giant freshwater prawn pascalarvae, immersion dose, recombinant growth hormone

Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf