Heterosis Nila (Oreochromis Sp.) Strain Larasati F5 Umur 5 Bulan Dibandingkan Dengan Tetuanya

• Main Author: GIFFARI, Abuzar
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2014
• Subjects: Animal Breeding; Fish Physiology and Genetics; Fisheries Sciences
• Online Access: https://repository.ugm.ac.id/129453/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=69844
• Institution: Universitas Gadjah Mada

Tilapia Larasati strain fifth generation (F5) was the strain of cross-breeding between Tilapia Kunti strain F5 female and Tilapia Pandu strain F5 male. The objective of the research is to compare survival rate (SR), weight, total lenght, thickness, specific growth rate (SGR), and feed convertion ratio (FCR) of Tilapia Larasati strain with their parents. There were two concept comparation to obtain the heterosis. Tilapia F5 by aging of 4 months was used as the research object. Tilapia separately cultivated by strain and sex for 1 month in pond sized 20x10x1 m3, water depth 70 cm and water discharge ± 15 liters/sec. The fishes were stocked in each pond was 450 fishes. The fishes were food 3 times by ad libithum method. Feed used was a commercial pellet with a minimum protein content of 30%. The fishes were measured at the beginning and the end of maintenance. The parameters were determined SR, SGR, FCR and heterosis. Water quality was measured at the beginning of the maintenance, the second week, and the end of the maintenance. Heterosis was analyzed by descriptive analysis. The result showed that heterosis based first concept were SR 1.02%, total length 12.50%, weight 44.50%, thickness 9.60%, SGR of weight 4.10%, SGR of length 11.82%, SGR of thickness 9.95% and FCR -1.50%. The result showed that heterosis based second concept wereSR 1.29%, total length 13.20%, weight 46.00%, thickness 10.30%, SGR of weight 4.89%, SGR of length 12.68%, SGR of thickness 11.60%, and FCR -1.7%. The water quality were eligible to be used for tilapia farming with range of temperature 26 – 29˚C, dissolved oxygen 2.7 – 3.5 ppm, pH 7.1 to 7.3, and water discharge 15-20 liters/sec.Tilapia Larasati have better characters than their parents which were shown by positive value of heterosis, and negative value of FCR in heterosis.