PHYSICOCHEMICAL AND MICROBIAL EVALUATIONS OF DIFFERENT FISH PONDS’ WASTE WATERS AND THE ANTIBIOTICS PROFILES OF ISOLATED BACTERIA

Abstract

Aquaculture is a global practice that entails the breeding of different fish species. It is incessant in the Nigerian community as wastewater released from pond farms into surrounding drainages and water bodies cause pollution. In this study, a comparative analysis of the physico-chemical parameters (temperature, pH, salinity, conductivity, Dissolved Oxygen (DO) and Biological Oxygen Demand (BOD), and microbial evaluation of wastewater samples from concrete, plastic, wooden and earthen fish ponds located in Ogun and Lagos states followed with antibiotics sensitivity profile of the isolates were investigated. The values of temperature, pH, salinity, conductivity, DO and BOD of the wastewaters ranged from 23.83 – 24.67 °C, 6.57 – 9.68, 0.08 – 0.26 ppt, 65.67 – 200.7 µS/cm, 0.67 – 1.63 mg/L and 36.67 – 253.3 mg/L, respectively. Aerobic plate count and coliform count of bacteria isolated from different fish ponds wastewaters ranged from 6.40x105 to 4.20x106 cfu/mL and 2.80x103 to 1.98x105 cfu/mL, respectively. Enterococcus spp., Staphylococcus spp, Streptococcus spp., and Micrococcus spp., Aeromonas spp., Chromobacterium spp., Escherichia spp., Klebsiella spp. Listeria spp., Pseudomonas spp., Proteus spp., Providencia sp., Shigella sp., and Salmonella spp. were isolated from different ponds wastewaters. All selected bacterial isolates were susceptible to ciprofloxacin with the exception of Streptococcus sp., Chromobacterium sp. and Providencia sp. Antibiotics susceptibility pattern of isolated bacteria showed that most of the isolates had very high rate of resistance to the common antibiotics which could pose danger to the environment. The results obtained from this study suggests that control of wastewater release from fishpond farms to environment is necessary in other to maintain a stable environment, thereby reducing pollution