Fly worm as alternative to feed lambari bocarra (Oligusarcus argenteus)

The objective of the present study was to evaluate the lambari's performance ( Oligusarcus argenteus ) using fly worms ( Musca domesticus ) as a feeding source in substitution to ration. Six hundred fingerlings of lambari bocarra were used with initial mean weight of 0.88 ± 0.14 g and an average length of 3.62 ± 0.30 cm. A complete randomized experimental design was used with five treatments, T1: 100% of ration, T2: 25% of fly worms and 75% of ration, T3: 50% of fly worms and 50% of ration, T4: 75% of fly worms and 25% of ration, and T5; 100% of fly worms with four repetitions and 30 fingerlings in each aquarium. Fingerlings were kept in an aquarium of 1.000 L volume. T1 treatment showed no significant differences (P>0.05) for final weight, weight gain, daily weight gain, and total length compared to the other treatments, obtaining the worst results. For the standard length, treatments T2, T3, and T5 obtained the best results (P 0.05) for specific growth rate for all treatments. For the carcass yield the best results were observed in treatments T2 and T4. Treatment T1 obtained the worst result for viscer somatic index (P<0.05). For the production of lambari, it could be used 75% of fly worms instead of 32% PB ration, which provides better results for carcass yield. For final weight, weight gain, daily weight gain and total length it could be used up to 100% of fly worms in substitution to 32% crude protein ration.