Question

There is mortality of fishes in a pond. What may be the reasons?

Answer 1

Mortality of fishes in a pond could be a result of various factors such as

1 Natural mortality
2 There could be depletion in oxygen in the pond.
3 Mortality due to bacteria or parasites
4 Algal blooms
5 Entry of sewage water
6 Pesticides or chemical water run off.