Percentile variation and frequency of food supplied in the final development of silver catfish (Rhandia quelen) in the phase of it recreates

Abstract

The experiment was led during a 65-day period, in the Estação de Piscicultura/EPAGRI, belonging to Estação Experimental of Caçador/SC. Forty bowls with the capacity of 40 liters were used, with individual supply and flow, with each bowl considered as an experimental unity. The experimental delineation was entirely random in a factorial scheme where the factor A is the percentage of daily feed (1, 2, 3, 4, 5%) and the factor B is the daily frequency of feed (once or twice a day) with 4 repetitions. The variables weight gain, length gain, survival and feed conversion ratio were submitted to variance analysis. The ration used was bought in the local commerce with 28%BP and 2.800Kcal of EM/kg of ration inside the criteria, for the species. Six silver catfish (Rhamdia quelen) fingerlings were stored per bowl with medium weight of 0,08 ± 0,01g and medium length of 1,5 ± 0,1cm, 23 days old. The water temperature evaluations were made daily, always at 09:00h and at 15:00h. At these moments, the fishes were given the daily ration. The fish biometry was done in the beginning of the experiment, 30 days later and in the end of the experiment, 65 days after the beginning, using 100% of the stored fishes, when the measures of total length, individual weight, survival and feed conversion rate were made. For the raising of silver catfish (Rhamdia quelen) fingerlings in the breeding phase the frequency of ideal feed is once a day in the percentage of 2 to 5% of its weight per day.