PENGARUH PENAMBAHAN MINERAL Fe PADA PAKAN IKAN TERHADAP STATUS KESEHATAN IKAN KERAPU BEBEK (Cromileptes aftivelis)

This study was conducted to find out the health status of humpback grouper fish(('hrtmtileptes altiverts) that are fed on inorganic-iron supplement. Both, thetreatment and the control was tested in anoxia condition. The fish (average weight4.18±0.13 g/ind) was cultured in 60x40x50 cm3 aquarium and stocked by 10indJaquarium. The fish was reared for 10 weeks: and they were fed threetimes/day at satiation. Results shown that the fish fed by non-iron supplement wasmore susceptible than the normal condition; base on the index of leucocytes,nionocytes. phagocytic and MCHC distribution. However, 25 mg Fe/kgsupplement in the diet was increased concentration of Fe by 35% - 100% in liver,intestine, body tissue and enhance fish vitality at anoxia condition. The survivalrate of fish increased by 1.3 times compare to the non-iron supplementation.