Fish Extinctions
Fish Extinctions
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Systematic Studies of Southeastern Fishes
The southeastern United States is home to a variety of freshwater snails, mussels, crayfish, and fishes. USGS scientists are conducting systematic studies to better document the region's biodiversity.
Conservation Research on North American Freshwater Faunas
The decline of freshwater animals has resulted in an increase in the number of imperiled species and extinctions. USGS scientists use genetics to determine if these species truly are gone forever.