Careful monitoring of species fished for sport maintains these populations in adequate numbers. Nongame species, and those with very small distributions, fare less well. For example, numerous darter species, which are neither sport fishes nor broadly distributed, are listed as threatened or endangered. Some species in these families have been widely introduced outside of their geographic ranges. The successful naturalization of percids and centrarchids in areas well outside of their aboriginal ranges has often had deleterious effects upon faunas of indigenous fishes.
The IUCN Red List categorizes 1 species from this group as Extinct; 2 species as Critically Endangered; 4 species as En dangered; 30 species as Vulnerable; 12 species as Lower Risk/ Near Threatened; and 7 as Data Deficient.
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