Depleted dissolved oxygen caused fish kill

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Natural causes appear to be the reason for the deaths of thousands of fish in the Las Piñas-Parañaque Wetland Park (LPPWP) last October 10, according to Department of Environment and Natural Resources (DENR) Secretary Roy Cimatu.

Based on the initial water quality test results, it revealed that the fish kill resulted from low concentrations of dissolved oxygen in the water.

Dissolved oxygen is the volume of oxygen that is contained in the water and is vital in supporting aquatic life, while Class SB water classification means that the water is “suitable for commercial propagation of shellfish and intended as spawning areas for milkfish.” Based on the results, the DO for Station 1 was 3.3 mg/L; Station 2 , 3.4 mg/L; Station 3 , 5.9 mg/L; and Station 4 , 9.8 mg/L.

 

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