Judul: : Pengaruh Salinitas terhadap Sintasan dan Pertumbuhan Benih Ikan Baby Dolphin Mormyrus longirostris
Abstrak: Baby Dolphin fish is one of many aquaculture commodities with high demand in export market. However, the high demand of Baby Dolphin has not been balanced with the profit of the fish fry production. One of technologies that could be applied to increase the production efficacy is increasing osmoregulation effectivity by optimizing the salinity. The purpose of this research was to determine the optimum salinity to improve survival rate and growth of Baby Dolphin fries. The average of initial weight and length of Baby Dolphin used in this study was 0.15±0.022 g and 1.46±0.12 cm reared in glass tanks sized 49x30x32 cm filled with 30 litres of water. Completely randomized design was used in this research. The treatments consisted of 0 ppt, 3 ppt, dan 6 ppt of salinity. Rearing was performed for 21 days. Siphoning and water exchange of 75% was performed daily for rearing media. Salinity of 0 ppt showed the best results with 98.33±2.88% survival rate, 1.511±0.11 g absolute growth rate, and 7.64±0.27% daily growth rate.
Keyword: Bogor Agricultural University (IPB), and growth, Baby Dolphin fry, Salinity

Judul: Optimasi Salinitas untuk Kelangsungan Hidup dan Pertumbuhan Benih Ikan Tengadak Barbonymus schwanenfeldii
Abstrak: Environmental manipulation techniques are required to increase survival rate and growth of fishes, salinity manipulation is one of them. Salinity directly affects the living organisms life especially in survival rate and growth rate because it is strongly related with their osmoregulation process. The purpose of this research was to determine the optimum salinity for survival rate, growth, and economic profit for nursery activities of tinfoil barb (Barbonymus schwanenfeldii). This research consisted of four treatments of media salinity: 0 ppt (A), 2 ppt (B), 4 ppt (C), and 6 ppt (D). The rearing of tinfoil barb in different salinities showed significant effects on survival rate. Different salinity treatments also showed significant difference on specific growth rate of tinfoil barb.The optimum salinity for tinfoil barb was 4 ppt showed by the highest survival rate at 90%, highest specific growth rate at 1,65%, and highest profit achieved for nursery activities at Rp 139.002 with R/C ratio at 1,12.
Keyword: salinity., specific growth rate, survival rate, tinfoil barb

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