DIURNAL VARIATION IN SOME PHYSICO-CHEMICAL PARAMETERS IN POST MANSOONJ.V. BALKHANDE, B.D. WAGHMARE, A.N. KULKARNI AND A.S. KULKARNIAbstract Diurnal variation in some physico-chemical parameters in aquatic environment are useful to find out the productivity and suitability for fish culture practices. The present research work on diurnal changes in physico-chemical parameters such as water temperature, pH, dissolved oxygen and free carbon dioxide was carried out in fresh water `Derla Tank' in Nanded District. The water temperature was recorded in the range of 26 to 28 "C. The pH values were recorded in the range of 7.4 to 8.2. The dissolved oxygen concentrations were recorded in the range of 5.6 mg/L to 10.4 mg/L and free carbon dioxide concentrations ranged between 0 to 2.0 mg/L. It is revealed that these physico-chemical parameters change diurnally due to variation in water parameters, photosynthetic activity and others. In the present research work all the physico-chemical parameters were found in desirable range and are conducive for fish growth.
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