A Survey of the Mussels (Unionacea) of the Illinois River: a Polluted Stream

The basic purposes of this investigation were to make a survey of the pearly mussel (Mollusca: Pelecypoda: Unionacea) populations of the entire Illinois River in order to formulate a sound basis for managing the mussel resource of this river, and to determine what species and distributional changes had taken place during the past century.published or submitted for publicationis peer reviewe