Published in Scientific Papers. Series D. Animal Science, Vol. LIX
Written by Kiki HAETAMI, ABUN, Deni RUSMANA,Yeni MULYANI
Nilem fish (Osteochilus hasseltii) has a great potential as product of baby fish (three months old), and fish eggs (caviar) and that is now introduced in the floating cages started nursery phase. Optimization of cultivation through input-protein energy efficient as well as enrichment efforts fatty acids in the diet is very urgent. This study aims to get the kind of fat supplement of alternative materials which added to the feed to improve growth and protein retention in nilem fish reared in Cirata. The research was conducted in two stages: (1) Phase 1, scale up alternative sources of fats from hazelnut and meal worm (Tenebrio molitor); added in the feed formulation; (2) Phase 2, growth, feed conversion, and retention of protein on fish meat. The experimental design in biological assay using a completely randomized design (6x3); with standard ration treatment (Rs), then Rs with the addition of animal fat supplements (meal worm) and vegetable oils (hazelnut) in the form of flour and oil extraction, as well as a commercial feed controls. The results showed that: 1) Yield of pure oil of hazelnut and meal worm results flouring solvent extraction followed respectively by 27.3% and 12.15% of the fresh weight. 2) Feeding for four weeks showed that growth rate between 3.72 g - 5.82 g, with meal worm feed supplements 2% was highest absolute growth rate, and no significant with high protein on control, and so was hazelnut 2%. 3) Retention of protein obtained in supplement worm oil and hazelnut oil 1%, respectively 33.42 and 33.46%.
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