Avaliação de efeito de diferentes níveis da fitasse adicionada a ração de microalgas de girassol no crescimento da Tilápia Moçambicana - Oreochromis mossambicus

Abstract

The objective of this work was to evaluate the effect of the addition of different levels of phytase in the diet on the zootechnical performance of mossambicus tilapia. The experience of cultivating fish Tilapia Oreochromis mossambicus about 6g of initial weight, The experience of cultivating fish Tilapia about the initial average weight 8.56g, had a period of time of one month, in aquaculture laboratory PVC tanks. The efficiency of the experimental ration produced of vegetal origin was evaluated comparing the zootechnical performance of the tilapia. The fish fed with experimental ration of sunflower obtained weight gain (PG) about 0.94g, with the feeding rate of 900g, with survival of 93.3%, while fish fed by the Microalgae ration obtained average weight gain about 1.74g, with the breeding rate of 900g and survival of 96.6%. It is concluded that the inclusion of microalgae biomass in the diet constitutes a good source of protein and an improvement in the zootechnical performance of tilapia, its use in feed formulation may be one of the alternative sources of protein to promote increased production and availability of this biomass, replacing the vegetable source of protein.