Preliminary study on bacteriological and physicochemical water profile of cyprinid fish ponds

• Published in: Aquaculture, Aquarium, Conservation & Legislation Vol. 10; no. 1; pp. 103 - 112
• Main Authors: Vasile, Mihaela A, Metaxa, Isabelle, Plăcintă, Săndiţa, Mogodan, Alina, Petrea, Ştefan M, Platon, Cătălin
• Format: Journal Article
• Language: English
• Published: Cluj-Napoca Bioflux SRL 28.02.2017
• Subjects: Aerobic bacteria; Aquaculture; Bacteria; Coliforms; Contamination; Dissolved oxygen; Ecological effects; Edema; Enterobacteriaceae; Farmers; Farms; Fish; Fish culture; Fish farms; Fish ponds; Food contamination & poisoning; Growing ponds; Growth models; Inlets (waterways); Legislation; Marine environment; Microorganisms; Nitrates; Nutrition; Parameters; pH effects; Physicochemical processes; Ponds; Proteins; Sampling; Water analysis; Water intake; Water intakes; Water quality; Water sampling; Romania; India
• ISSN: 1844-8143; 1844-9166

The optimal parameter values related to bacteriological and physicochemical water quality in the on-growing ponds, are important for the fish biomass optimal growth. In fish farming, the fish must be correctly fed and must have the appropriate water environment conditions. This study aims to determine the water quality of cyprinid fish ponds with regards to the value of main bacteriological indicators and of some physicochemical parameters. Water samples were collected from two different cyprinid ponds P1 and P2, Movileni fish farm, Iaşi district, Romania. The average temperature of water in sampling points varied between 20.44 and 22.08°C. The water pH values in all sampling points were alkaline (> 8.50). The average values of nitrate ranged from 1.36 to 4.98 mg L-1, showing highest values in the outlet points of the ponds (site E1 - 4.98 mg L-1 and site E2 - 4.90 mg L-1). The maximum concentration of dissolved oxygen (17.92 mg L-1) was observed in inlet source (A) and the lowest concentrations of 5.41 and 3.27 mg L-1, were recorded on evacuation points E1 and E2, respectively. In ecology the physicochemical parameters have a direct influention on the microbial population, indirectly affecting fish development. The average values of total number mesophilic aerobic bacteria were higher in the fish farm intake source (site A - 5.45 log CFU mL-1). The coliform bacteria have been identified in all water samples of the two ponds and their numbers varied between 16 500 and 75 000 CFU mL-100. The water intake source (A) was characterised by a higher number of coliforms bacteria (45 000 CFU mL100). According to Romanian aquaculture legislation, the water quality of the ponds P1 and P2 of Movileni fish farm, Iaşi district, Romania could be classified as IIIrd quality class, moderate to critical contamination.