Effect of feeding rate on growth and feed conversion ratio in the cultivation recirculation systems multi tropic model Heriansah (a), Radjuddin Syamsuddin (b), Najamuddin (b), Syafiuddin (c)
a. Doctoral Student in Fisheries Science Study Program, Faculty of Marine Science and Fisheries, Hasanuddin University, Indonesia
b. Departement of Fishery, Faculty of Marine Science and Fhishery, Hasanuddin University, Makassar, Indonesia
c. Departement of Marine Science, Faculty of Marine Science and Fhishery, Hasanuddin University, Makassar, Indonesia
Abstract
The effects of feeding rate (0.5%, 7.5%, and 10% body weight (BW) per day on the growth, survival rate, and feed conversion ratio of juvenile rabbit fish, Siganus guttatus, were investigated in a water recirculating aquaculture system of Integrated Multi Trophic Aquaculture (IMTA) model involving mussel Perna viridis, sea urchin Diadema sitosum, and seaweed Kappaphycus alvarezii. Triplicate groups of fish were fed an comercial diet (55.4% protein, 14.1% lipid) four meals a day (08 a.m, 12 a.m, 4 p.m, dan 8 p.m) for 12 weeks. Weight gain, specific growth rate, and feed conversion ratio were better with increasing feeding rates with relatively the same survival. Body weight gain, specific growth rate, and feed conversion ratio were not significantly different among the fish fed 5% and 7.5% BW per day but increased significantly in those fed 10% BW per day. Experimental application of the IMTA model shows that although the amount of feed given is higher, it can produce better growth performance and feed utilization
Keywords: feeding rate, feed conversion ratio, growth, IMTA, rabbit fish
