The Little River in Blount County just west of Great Smoky Mountains National Park hosted just one of five known fine-rayed pigtoed mussel populations when federal officials placed the mussel on the Endangered Species List in 1976.
The Daily Times in Maryville reports that the U.S. Fish and Wildlife Service is now conducting a regular five-year review of the mussel's status. It is one of at least 12 mussel species in the river, which has its headwaters in the Great Smoky Mountains and flows through Townsend on its way to its ultimate destination: the Tennessee River. Little River is the main source of water for an expanding Blount County population.
Native mussel populations face the same threats as many non-game fish in the Southern Appalachians. Oxygen is depleted by sediment plumes, which also smother fish eggs, and many mussels rely on small fish to reproduce.
“Reproduction depends on host fish. During the larval stage the young are stuck together in a packet that resembles the prey of shiners and minnows, which is how they become attached to the fish gills or fins to grow for a few weeks,” the Daily Times reports.