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Survey LTRMP Field Station on La Grange

By John Tucker and Charles Theiling

Abstract

large bivalve (two-shelled) mollusks that live in the sediments of rivers, streams, and to a lesser extent lakes. These soft-bodied animals are enclosed by two shells made mostly of calcium and connected by a hinge. They are variously pigmented, with some being uniform dark brown or black to bright yellow. Many species have distinctly colored rays and chevrons and bumps or ridges, or both (Figure 11-1). The Long Term Resource Monitoring Program (LTRMP) does not sample freshwater mussel populations but has been active in supporting mussel research and the ecological factors that affect mussels. For example, when zebra mussels were first introduced into the Upper Mississippi River System (UMRS), the LTRMP participate

Year: 2012
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