U.S. Fish and Wildlife Service
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Mussel Conservation Activities

A total of 106 closed propagation cages were placed in the Upper Mississippi River.  Fourteen cages were monitored and contained 1,444 juvenile Higgins eye.

juvenile Higgins eye.

Frontenac Propagation Cages, 2006

Juvenile Higgins eye pearlymussels (Lampsilis higginsii) collected in 2006 from closed propagation cages in the Upper Mississippi River, Pool 4 (Frontenac), Minnesota.  Juvenile mussels are three months old and some have attached zebra mussels (Dreisenna polymorpha).  Top photo by Gary Wege, U.S. Fish and Wildlife Service; bottom image by Dan Kelner, U.S. Army Corps of Engineers.

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Last updated on December 21, 2006