Farinha de fígado bovino para tilápia do Nilo e pintado amazônico na fase inicial.

Abstract

Tilapia is the most produced fish in Brazil, occupying the 4th position of the most cultivated in the world. This position is due to relevant aspects, such as fast growth, they do not require sophisticated technology, accept a wide variety of foods, good feed conversion, are resistant to many diseases and spawn throughout the year, in addition to having excellent flavor and texture. The Amazonian Pintado is a hybrid fish resulting from the crossing between cachara (Pseudoplatystoma spp.) and Amazonian jundiá (Learius marmoratus). It has good organoleptic qualities and excellent carcass yield, characteristics that are very favorable to serving the consumer market. Protein is the most expensive component of an animal's diet, and its quality in one food can be compared to that of another by the composition of amino acids, especially the proportion of those essential. Fishmeal is considered a standard ingredient in diets for aquatic organisms due to aspects such as high biological value and its balance in amino acids, however, it has a high cost and its manufacture is of low quality and lower biological value. Meat and offal meal has been used to partially or totally replace fish meal in commercial feeds. Bovine liver flour (BLF) is a protein source with important potential in fish nutrition due to its nutritional qualities. The objective of this experiment was to evaluate the inclusion of BLF in diets for juveniles of Nile tilapia, Thai lineage and juvenile of Amazonian Pintado, in order to determine their zootechnical and economic performance. For Nile tilapia juveniles, it was found that the inclusion of 20% of BLF provided better productive performance and better economic return, being, therefore, recommended. For Amazonian painted juveniles, considering the productive perfomance and cost incidence, the inclusion of 10% BLF is recommended.