Trairão(Hoplias cf. lacerdae) fingerlings, averaging 12.52 g and 10.5cm, respectively, previously trained to accept artificial feed, were stockedin six tanks (5 m²), under two stocking rates: 1 and 4 fingerling/m²,constituting the treatments t1 and t2, respectively. The fishes of the differenttreatments were ad libitum fed an extruded commercial diet containing42% crude protein, at 8 a.m. and 2 p.m. at each 30 days, the water volume ofall tanks was 100% replaced. at the end of the experiment, 120 days, the fishesproductive performance was evaluated by means of survival rate, feed:gain ratioand daily length and weight gains. average survival rates of 86.7 and 96.7%were observed for the stocking rates of 1 and 4 fish/m², respectively. feed:gainratio of 1.6 and 1.2 and daily length and weight gains of .70 and .38 g and8.01 and 7.27 cm, respectively, were obtained for both densities. these valuesdid not differ from each other. it was concluded that it is viable to producethe trairao fingerlings, under the evaluated stocking rates, without reducingperformance.
