オオクチバス
Largemouth bass populations boomed after the U.S. Department of Agriculture began to advise and assist farmers in constructing and stocking farm ponds with largemouth bass, even offering advice on managing various fish species. Soon, those who had stocked largemouth bass on their farm ponds began to pursue them on a burgeoning number of new reservoirs and impoundments built in the United States during the 1940s and 1950s. These impoundments coincided with a postwar fishing boom, additional funds from sales of fishing licenses for the first large-scale attempts at bass fisheries management. This was especially true in the southern United States, where the largemouth bass thrived in waters too warm or turbid for other types of gamefish.