Biovailability Fe-Tepung Darah untuk Pertumbuhan dan Peningkat Daya Tahan Tubuh Ikan Kerapu Bebek

Abstract

Humpback grouper (Chromileptes altivelis) is sensitive to stress that cause low growth rate, mortality, and harvest. Iron is micro-nutrient that can enhance the immunity. The use of blood-meal which contain of high Fe and protein in the fish feed can be accepted as food supplement; however the bioavailability of Fe is still low. To increase the absorption of Fe in blood-meal, the fish feed was supplemented vitamin C, Zn and atractant as a micro nutrient balancing. This experiment was conducted to determine the maximal volume of the enriched blood meal as Fe source for fish growth and vitality increase at infected by bacteria. The fish weight 11,60 ± 0,2 g/ind and was cultured in 50x40x35 cm aquarium and stocked at a density of 10 ind. /aquarium. Reared for 40 days, the fish was fed by diet three times daily at a satiation. The results showed that the fish fed by 120 g/kg diet of blood meal as Fe source gave the best for protein retention 42,1 ± 2,9%, increased concentration of Fe in liver, intestine and body tissue. The growth performance of fish was not significant different with the fish fed by Fe-sulfat supplementation. The index of phagocytic after infecting of vibrio algynolyticus was higher compare to the other experiment diet.