Inclusão de alho como aditivo alimentar em dietas de patingas

Abstract

The cultivation of hybrid fish resulting from crossing pacu (Piaractus mesopotamicus) and pirapitinga (P. brachypomus) is widespread in fish farms in the southern region of the state of Mato Grosso do Sul, due to its adaptation to climate characteristics and good productive performance that the fish has. The objective of this work was to verify if the addition of garlic in diets favors the growth of patinga fingerlings (12.69±0.56g). For this, 150 fingerlings were used, which were distributed in a completely randomized design containing five treatments and three replications. Five experimental diets were formulated containing 0.0% 1.5%, 3.0%, 4.5% and 6.0% inclusion of garlic powder and fed four times a day. To prepare the diets, garlic was mixed with 2% soy oil and incorporated into the feed. The fish were housed in 0.5m3 net tanks (10 fish per experimental unit), and installed in a geomembrane tank with a total volume of 50m3 and with circulation and constant filtration from pumping water. Final weight (FP), final length (CF), weight gain (GP), feed conversion (CA), specific growth rate (TCE), protein efficiency rate (TEP), hepatosomatic index (IHS), visceral fat (GV) and intestinal quotient (IQ). The evaluated data did not show significant effects (P>0.05). Due to these responses and due to increased costs, it is not feasible to include garlic in the ration of patingas for growth purposes, however our observations did not detect the presence of pathogens or mortalities even when the water was at mild temperatures, suggesting a possible prevention against pathogens. More studies are being conducted to see if there was any biochemical, enzymatic and histological effect on these animals.