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: Respons benih ikan gurame (Osphronemus goramy) yang diberi hormon pertumbuhan rekombinan melalui oral pada dosis berbeda
Abstrak: This study was aimed to evaluate the response of giant gourami juvenile on oral administration of recombinant giant grouper growth hormone (rElGH). A total of 45 juvenile were fed with rElGH coated by hydropropylmethyl cellulose phthalate (HP55) and mix with commercial diet (35% protein content). Feeding fish with diet containing four different doses of rElGH (0 mg/kg feed, 0.3 mg/kg feed, 3.0 mg/kg feed, and 30.0 mg/kg feed) was performed in twice a week for 2 month. Fish were then maintained for 1 month without rElGH treatment. The results showed that biomass harvest in treatment 3.0 mg/kg (1,376.0±38.3 g) and 30.0 mg/kg (1,362.2±78.5 g) was similar, and the two treatments were 46.76% and 44.28% higher compared to control (977.6±96.7 g), respectively. In addition, rElGH treatment increased appetite, while artificial feed conversion ratio (1.18) was lower (P<0.05) by 23.72% compared to that of control (1.46). Oral administration of rElGH also increased hepatosomatic index (16.12%) and protein content (17%), while lipid content (21%) decreased compared to control. Similar in fish survival at end of experiment, insulin-like growth factor-1 and growth hormone receptor-1 gene expression levels in brain at 24 hours after feeding in rElGH treatment and control were obtained. Thus, orally rElGH administration was effective to be applied to enhance the growth of giant gourami juvenile.
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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