Avaliação do crescimento de pós-larvas de tambaqui (Colossoma macropomum - Cuvier, 1818), submetidos a diferentes níveis de inclusão de moringa oleífera na dieta

Abstract

The tambaqui fish (Colossoma macropomum), originally from the Amazon, is the second most cultivated species in Brazil. It adapts easily to feedlots and commercial feeds, however, feed based on corn, soy and fish meal can increase the cost of production, especially during off-season or when stocks are limited. Thus, the constant search for alternative foods that can replace conventional foods, has been sought, with the objective of reducing production costs and increasing fish performance. One of these alternative foods is Moringa oleifera, which has great nutritional potential. The objective of this study was to evaluate the levels of inclusion of M. oleífera and its effects on the growth of tambaqui post-larvae. The experiment was carried out at the Laboratory of Nutrition and Feeding Behavior of Fish (AQUA), at the Federal University of Recôncavo da Bahia (UFRB), lasting 47 days. In a completely randomized design (DIC) with 4 treatments and 5 repetitions, containing 50 post-larvae of Colossoma macropomum in each unit. The treatments consisted of different percentages of Moringa oleifera replacing fish meal, inclusion levels: 0%, 10%, 20% and 30%. Initial and final biometrics were performed to obtain weight and length and zootechnical parameters. For the variables weight gain (WG), daily weight gain (DWG), final weight (FW), final length (FL), survival and specific growth rate (SGR), there were no statistical differences (P> 0.05). Total feed consumption and daily consumption were different and the 30% level of inclusion of Moringa oleifera showed the lowest consumption (P <0.05). Indicating that low consumption did not affect the development of tambaquis, thus promoting a reduction in feed consumption. The Moringa oleifera can partially replace a conventional food such as fish meal, in the initial phase of feeding of C. macropomum, with a maximum level of inclusion of 20% without influencing the performance and total feed consumption.