Assessment of some Physico-chemical parameters of the fish farm water in Abengourou, Côte d'Ivoire | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 19, Volume 26, Issue 5, September and October 2022, Page 319-343 PDF (913.32 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.2022.261442 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Ali Sanou et al. | ||||
| Abstract | ||||
| The objective of this study is to assess the Physico-chemical quality and the trophic state of the waters of a fish farm in ponds located in Abengourou in the east of the Côte d’Ivoire. The physicochemical parameters were determined in water samples collected on the farm from September to October 2020 according to the NF T90-105 standard of AFNOR (1997). The monthly values of temperature, hydrogen potential, dissolved oxygen, conductivity, total dissolved solids, transparency and suspended matter are respectively between 28.28 - 30.87 ºC; 6.2 - 8.18; 5.28 - 6.92 mg/L; 32 - 101 µS/cm; 21 - 42 mg/L; 25 - 43.6 cm and 101.69 - 149.58 mg/L. Monthly concentrations of nitrite, nitrate, ammonium, phosphate and chlorophyll-a in farm water respectively ranged from 0.009 to 0.028 mg/; from 3.7 to 16.6 mg/L; 1.04 to 2.69 mg/L, 2.2 to 4.3 mg/L and 2.6 to 6.6 µg/L. The values of the measured parameters were compared with the standards recommended for the breeding of tilapia Oreochromis niloticus. The comparative analysis revealed that most of the water quality parameters are suitable for the breeding of the fish Oreochromis niloticus. However, the transparency, the conductivity and the recorded phosphate results were not compliant with the standard values, which are respectively between 30 - 80 cm, 150-450 µS/cm and 0.5 mg/L. The values of the TDS / EC ratios (0.48 - 0.78) and the pollution indices (2.00 - 2.66) showed strong mineralization of the water and a high level of organic pollution in all the structures of the farm which indicate a eutrophic state of the water of the dam and the ponds. So this eutrophication phenomenon can lead to long-term stress and mortality of fish if adequate measures are not taken. | ||||
| Keywords | ||||
| Fish farm; physico-chemical parameters; organic pollution index; eutrophication; Oreochromis niloticus; Côte d’Ivoire | ||||
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