Influência do uso de substratos artificiais na criação do camarão Litopenaeus vannamei

Abstract

The objective of this study was to evaluate the influence of the artificial substrates on phisical-quemical parameters of the water and the consumption of Biofilm and performance in shrimp Litopenaeus vannamei. The experimental unities were composited of 4sq meters, with 120 young shimps wheighting 2.8 grams and artificial substrates containing 25% of the area from the enclosed. The water quality analisys parameters were made daily and the swab of the biofilm was realized and the swab of the biofilm was realized in the last day of the experiment (49th day ).The testimony treatment did not have artificial substrates nor ration supplied , the other treatments presented artificial substrates and growing rate of division into rations 0%,2%,4% e 6%; of total shrimp biomass . Were used randomized blocks experiment, with five treatments and four repetitions. The artificial substrates did not influence the temperature transparency, ammonia and ph. The final average weigh in the treatment without ration was equal existing or not artificial substrates .The final average weigh final average length final biomass and productivity presented positive influence on division into rations . The ideal rate of divisions into rations in the regression analisys was 5,54% for final average weigh, 5,37% for the final average length,5,15% final biomass and 5,13% productivity. The experiment results show that with 25% of substrated artificial area there is an excellent percentage in the rate of divisions into rations between 5,13% and 5.54% of the total biomass in these shrimps.