Title of article :
Feed-nutrients uptake rates of different weight groups of red tilapia (Oreochromis sp.) in a recirculating aquaculture system
Author/Authors :
Rafiee ، Gholamreza Department of Fisheries - Faculty of Natural Resources - University of Tehran , Saad ، Che Ros Department of Agrotechnology - Faculty of Agriculture - University of Putra , Kamarudin ، Mohd Saleh Department of Agrotechnology - Faculty of Agriculture - University of Putra , Ismail ، Mohd Razi Department of Agrotechnology - Faculty of Agriculture - University of Putra , Sijam ، Kamaruzaman Department of Agrotechnology - Faculty of Agriculture - University of Putra
Abstract :
The role of different weight groups of the red tilapia on nutrient uptake of the feed supply was investigated in a recirculating aquaculture system (RAS). Five weight groups of red Tilapia viz. 20 (20±0.0), 40 (39.7±0.44), 80 (80.38±0.41), 120 (113.62±1.92), and 180 (177.67±1.81) g in triplicate treatments were designed. The studied nutrients uptake rates by red tilapia were significantly different (P 0.05) between the treatments. It was found that the red tilapia could assimilate 11.46% Fe, 13.43% Zn, 6.81% Mn, 3.55% Cu, 26.81 Ca %, 20.29% Mg, 32.53% N, 7.16% K and 15.98% P content of the feed supply during three weeks culture period. The specific growth rate (SGR) and food conversion ratio (FCR) indices showed significant differences (P 0.05) between the treatments. The highest growth rate was recorded in 120 g treatment. It was concluded that nutrient requirements of the red tilapia are changed in different growth stages.
Keywords :
Recirculating aquaculture , Red tilapia , Nutrient retention , Feed , Water quality
Journal title :
International Journal of Aquatic Biology
Journal title :
International Journal of Aquatic Biology
