Q45Short answer
There is mass mortality of fishes in a pond. What may be the reasons ?
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Hint—(i) Thermal pollution (ii) Addition of poisonous (mercury) compounds in water (iii) Due to blockage of gills with any pollutant.
There is mass mortality of fishes in a pond. What may be the reasons ?
Hint—(i) Thermal pollution (ii) Addition of poisonous (mercury) compounds in water (iii) Due to blockage of gills with any pollutant.