Qualidade microbiológica da água de cultivo de Oreochromis mossambicus - Peters 1852 em tanques escavados no distrito de Quelimane - província da Zambézia

Abstract

Fish farming is an activity practiced almost everywhere in the world, as it is a source of diet, employment and foreign exchange. However, the water used in fish farming is a potential reservoir of microorganisms that, when not monitored, could compromise the quality of tilapia. The present research had the objective of evaluating the microbiological quality of Oreochromis mossambicus in the city Quelimane. Microbiological analyzes were carried out in 12 water samples from 4 tanks, through filtering, multiple tube and seeding techniques. The total coliforms, thermotolerant and Escherichia coli , were detected only in tanks 3 and 4. The totalo aerobic bacteria count was 2,2x103ufc/ml; 1,4x103ufc/ml; 4,1x103ufc/ml e 2.2x103ufc/ml in the tanks 1, 2, 3, and 4 respectively. Salmonella, Vibrio cholera and Vibrio parahaemolyticus were not identified in all samples. The microbiological quality of the water was unsatisfactory in tanks 3 and 4.