Use of Various Waste Fish Protein Hydrolysate how Attractive in Diets for fry of surubim, pseudoplatystoma coruscans (agassiz, 1829)

Resumen

The objective of this experiment was to evaluate the effect of the protein hydrolysate of matrinxã head (Brycon amazonicus) and of tambaqui (Colossoma macropomun), as químio-attraction in diets for fry surubim (Pseudoplatystoma coruscans). They were elaborated the hydrolysates and the products were analyzed as for the chemical composition; matter dries, rude protein, ashes, total lipids and profile of free amino acids. The experimental diets (rations) they were elaborated to the base of fish flour, soy crumb, corn crumb, containing 40 % of rude protein and 3433,09 kcal of digestible energy in 1 kg ration. 300 fish fry were distributed at random in 15 boxes of polyethylene with capacity of 20 L, supplied with 15 L of water in the flow open of production, without recirculation. Five treatments were used with three repetitions each. The fish fry were fed four times a day during the seven days of the experiment. Everyday they were made the mortality observations and incentive to the food. A sample of 15 % of the fish fry was collected and the fish fry were depressed for analyses of stomach content and evaluation of the attractive potential of the diets. Where it was observed that the diets that contained the hydrolysates as much of matrinxã as of incorporate tambaqui were more effective than the other ones, in spite of the tambaqui hydrolysate to have if shown more attraction than the one of matrinxã.