Farinha de inseto em dietas de alevinos de tilápia

Abstract

The aim of this study was to evaluate zootechnical performance, somatic and hematological parameters on fingerlings of Nile tilapia, Oreochromis niloticus, fed diets with increasing levels of insect flour inclusion (IF) (Nauphoeta cinerea), 360 fingerlings at Nile tilapia Oreochromis niloticus were used, distributed in a completely randomized design with six treatments and four repetitions, denominated: T0 (0% IF inclusion), T5 (5% IF inclusion), T10 (10% IF inclusion), T15 (15% IF inclusion) T20 (20% IF inclusion) and a denominated T6 treatment in which the fingerlings were fed with commercial feed containing 42% crude protein. Tanks with a volume of 30 liters were used as experimental units with stocking density of 2.73 fishes·m-3 and intial weight 2.84±0.35 g. After 42 days of rearing was not observed significate difference for the initial and final weight parameters (g) weight gain (g) survival (%) final biomass (g·tank-1), productivity (kg·m-2) feed conversion, specific growth rate (%·day-1), hepatosomatic index (HSI), viscerosomatic index (VSI), erythrocyte and leukocyte parameters in the different treatments. In turn, the total plasma protein concentrations were higher in the fish fed diets with 10, 15 and 20% of IF, compared with control treatment (T6) and (T5) (p<0.05). According to our results, the IF can be used as alternative protein ingredient as it caused no loss in performance of fingerlings of Nile tilapia.