U.S. Fish and Wildlife Service
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Mussel Conservation Activities

A total of 24 juvenile winged mapleleaf were collected from three closed propagation cages placed in the St. Croix River in 2005.  Some juveniles were covered with zebra mussels.

juvenile Higgins eye.

Frontenac Propagation Cages, 2006

Juvenile winged mapleleaf (Quadrula fragosa) collected in 2006 from closed propagation cages in the St. Croix, River, Minnesota.  Mussels are 15 months old and some were covered by zebra mussels (Dreisenna polymorpha) as shown in top photo.  Photos by Byron Karns, National Park Service.

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Last updated on December 21, 2006