Judul: Kajian Kualitas Spermatozoa Ikan Tawes (Barbonymus Gonionotus, Bleeker 1849) Jantan Yang Berasal Pada Dua Kolam Budidaya Berbeda
Abstrak: Barbonymus gonionotus (Bleeker 1849) known as silver barb is one of the economically important freshwater fish that are frowned upon by the community as well as Indonesia. This fish had a good nutrition with 27.87 to 28.10% of protein. The important factor in the aquaculture is the availability of larvae which influence by the quality of spermatozoa. The purpose of this research was to examine the quality of silver barb spermatozoa on two different aquaculture environments) through the study of the semen characteristics including macroscopic and microscopic evaluation such as volume, pH, color, consistency, concentration, motility, morphology and morphometric of silver barbfish spermatozoa. A total of 20 fish from Purwasari and Parung were used in this research. The samples analysis was carried out in the laboratory of Reproductive and Rehabilitation Unit (URR), Faculty of Veterinary Medicine, Bogor Agricultural University. The results showed that all parameters characteristic of silver barb spermatozoa from Purwasari and Parung was significanly different (P<0.05) except for the semen color and consistency, pH, diameter spermatozoa head, concentration of spermatozoa as well as the morphology.
Keyword: semen quality, spermatozoa, fish, Silver barb

Judul: Dinamika Kualitas Air Pada Kolam Pemeliharaan Ikan Tengadak (Barbonymus schwanenfeldii Bleeker, 1854)
Abstrak: Tinfoil barb is a freshwater species, which population has been declining because of catch and environmental pollution. An attempt to keep this population is by aquaculture or cultivation. Good water quality was strongly influenced by the optimization of cultivation. This research was aimed to determine the dynamics of water quality and pollution level during cultivation. The research was conducted on nine ponds consisting of three treatments (feeding of 3%, 6%, and 9% of total biomass) with each of three replicates. During the research, the temperature ranged between 22,8 to 26,3 °C; transparancy between 16 to 46 cm; the colours was green to brown; pH between 6,46 to 7,74; DO between 0,7 to 5,29 mg/L; alcalinity between 31,85 to 104,7 mg/L; nitrite between 0 to 0,393mg/L; nitrate between 0,14 to 0,637 mg/L; ammonia between 0,0006 to 0,01 mg/L; ortophosphate between 0 to 0,343 mg/L. Ciapus River water used as an input for the culture had a good pollution level and moderate pollution level. The best water quality was found in feeding of 3% and the best growth rate was found in feeding of 9%.
Keyword: pollution, water quality, tinfoil barb

Judul: Train Scheduling Using Integer Linear Programming.
Abstrak: Karya ilmiah ini memberikan formulasi masalah penjadwalan kereta api menggunakan model pemrograman linear integer. Penjadwalan kereta api tersebut didasarkan pada jalur tunggal yang menghubungkan antar stasiun. Formulasi yang dibangun bertujuan meminimumkan keterlambatan serta menjamin bahwa tidak ada kereta api yang mengalami tabrakan baik searah maupun berlawanan arah. Input model berupa jadwal keberangkatan kereta api yang direncanakan (aktual), sedangkan outputnya berupa jadwal keberangkatan dan kedatangan kereta api yang faktual.
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