Permintaan ikan belida cukup tinggi untuk memenuhi kebutuhan konsumsi dan bahan baku olahan makanan yang masih mengandalkan tangkapan dari alam. Tingginya eksploitasi mengakibatkan populasi ikan dari tahun ke tahun semakin berkurang dan terancam punah. Teknologi pembenihan ikan belida dengan penggunaan hormon diduga dapat meningkatkan produksi larva untuk keperluan budidaya. Penelitian dilakukan untuk mengevaluasi performasi pemijahan ikan belida secara alami dan buatan melalui induksi hormon HCG dan LHRH analog. Pemijahan alami dan buatan dilakukan menggunakan induk betina sebanyak enam ekor dan jantan tiga ekor (rasio 2:1). Induk yang digunakan berukuran panjang 46 ± 5 cm dan bobot 2.209 ± 623 g. Pemijahan buatan dilakukan dengan induksi hormon HCG dosis 500 IU/kg dan LHRH analog dosis 0,5 mL/kg. Penyuntikan HCG dan LHRH diberikan dengan interval 24 jam. Hasil penelitian menunjukkan pada pemijahan buatan (induksi hormon) diperoleh induk yang memijah sebanyak dua ekor dengan nilai diameter telur (3,1 ± 0,3 mm); fekunditas (282-907 butir); derajat pembuahan (21%-40%); derajat penetasan (56%-75%); dan sintasan (30%-50%); sedangkan pada pemijahan alami diperoleh satu ekor induk yang memijah dengan nilai diameter telur (3,5 ± 0,3 mm); fekunditas (1.616 butir); dan derajat pembuahan (86,7%); selama tiga bulan pengamatan secara intensif dengan frekuensi pemijahan enam kali. Aplikasi teknologi pemijahan dengan menggunakan induksi hormon dapat menghasilkan produk larva pada ikan belida.The demand for fish consumption of Clown Knifefish is considerably high. However, the fish supply for consumption and processed food still relies on wild-caught. Such exploitation has decreased the population of Clown Knifefish to a point that it can become an endangered species. Efforts on the breeding technology of Clown Knifefish through natural and artificial propagation using of hormones have shown promising results. The current study was conducted to evaluate the performance of Clown Knifefish in natural and artificial spawning conditions using the induction of HCG hormone and LHRH analogues. The natural and artificial spawning treatments were conducted using six fish females and three fish males (a ratio of 2:1). The average Broodstocks’ size was 46 ± 5 cm in length and 2,209 ± 623 g in weight. The artificial spawning was conducted with HCG hormone induction (dose of 500 IU/kg body weight) and LHRH analogue (dose: 0.5 mL/kg). HCG and LHRH injections were given within 24 hours interval. The results showed that the artificial spawning (hormone induction) had successfully caused two broodstock to spawn producing eggs with the diameter of 3.1 ± 0.3 mm; fecundity of 282-907 eggs; fertilization rate of 21%-40%; hatching rate of 56%-75%; and survival rate of 30%-50%. In the natural spawning, one broodstock had spawned with the egg diameter of 3.5 ± 0.3 mm; fecundity of 1,616 eggs; and fertilization rate of 86.7%. This study concludes that spawning technology applications using hormonal induction can increase the production larvae of Clown Knifefish broodstock.

Optimization of Mahseer (Tor soro) rearing water media supports seed mass production. This study aims to obtain optimal salinity for production performance in rearing Tor soro. The research was conducted at the Wet Laboratory of the Research Institute for Freshwater Aquaculture and Fisheries Extension Bogor. The test fish was Tor soro with 1-2 cm in body length. Experimental design using completely randomized design with four treatments of salinity: 0, 2, 4, and 6 ppt and three replications each. Twelve aquarium glasses with a volume of 50 L each as experiment containers and stocking density was one fish/L. Tubifex worms were fed at satiation, fish were reared within 40 days. The observed parameters were survival rate, absolute growth and length, specific weight growth rate, blood glucose level, and osmolarity. Data analysis using ANOVA test and Duncan for post hoc test. Water quality parameters, blood glucose, and osmolarity were analyzed descriptively. The results showed that two ppt of media salinity is optimal for the rearing of Tor soro to obtain the maximum of production performance (survival rate, absolute growth, and length, specific growth rate) and the best condition for blood glucose and level osmotic work.

Hemibagrus nemurus is a freshwater catfish commodity that has high economi value and favored by the community. The purpose of study was to evaluate the growth and survival of Hemibagrus nemurus in aquaponics with the application of probiotics. The research was conducted in Sukawening Dramaga Bogor. Using 6 units of tarpaulin ponds measuring 20 x 3.0x 0.8 m filled with 3 M 3 of water, each pool is equipped with an aquaponics unit with an upstream system using lettuce and eggplant. The experiments, namely using probiotics and without using probiotics with 3 replication. The test fish used is 16.5 sd 0.2 g/individu The probiotics used at a dose of 10 ml/M3. Given every 5 days. Fish were given commercial feed of 4 % at 50 days rearing and then 3% until the end of the study with feeding times/day (morning and afternoon). The test parameters were SGR, survival, absolute weight, FCR and water quality. The result showed that the application of probiotic RIFA can increase the growth and survival of the fish, improve water quality and increase plant productivity.