Outbreeding Performance of Tinfoil Barb Barbonymus schwanenfeldii from Java and Kalimantan for Aquaculture Development

Aquaculture development of tinfoil barb farming is needed to increase production. This study aimed to evaluate the reproductive performance, growth and heterosis value on outbreeding of two tinfoil barb populations (Java and Kalimantan) reciprocally. Spawning was conducted by induced breeding using hormone stimulation (at dose of HCG 500 IU/Kg and dose of LHRH analog 0.6 mL/Kg). Spawning was carried in the aquarium with 1 x 0.5 m length and 50 cm height of fresh water as full sib ratio 1:1 (one female: one male). The measurement of hybrid in each population was repeated three times. The data were analyzed using analysis of variance (ANOVA), followed by Duncan test. Result showed that fingerlings resulted from ♀ Kalimantan and ♂ Java exhibited the highest reproductive and growth performances (P<0.05) with fertilization rate (94.17%), absolute length gain (2.85 cm), absolute weight gain (0.33 g), specific growth rate of length and weight (2.35% and 4.02%), and survival rate (57.20%).

PERFORMA PEMIJAHAN IKAN BELIDA (Notopterus chitala) MELALUI INDUKSI HORMON HCG DAN LHRH

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.