In the post-war WW II period, there were the very first efforts at bass management in fisheries. Farmers began to create ranch ponds having bass. On the other hand, because of industrialization and also contamination, many of the streams that had included trout began to be toxified. The trout began to be eliminated off. Smallmouth bass started to be introduced to replace them. Then the little mouth populations started to decline because of pollution as well.
In this scenario, there are 2 opportunities: way too many fish or otherwise enough meals. Either insufficient bass were gathered, or otherwise sufficient forage fish were stocked with the bass or there are insufficient forage fish to recreate adequately to give food for the bass to eat. If more bass are taken, as well as the population is thinned, and more forage fish are included, then there will certainly be enough food for the remaining fish.