Fish farming provides a reliable source of protein for humans.
A freshwater fish farmer notices several challenges while managing their fish ponds.
Suggest the cause of each problem and a solution for the farmer:
(i) An increase in mammalian predators, such as otters, visiting the ponds.
(ii) An accumulation of toxic ammonia in the pond water.
(iii) A rapid spread of bacterial disease among the fish.
Suggest two advantages of farming fish in controlled ponds compared to catching wild fish.
