U.S. Fish and Wildlife Service
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Mussel Conservation Activities

A total of 23,722 juvenile Higgins eye (2005 Cohort) were collected from 111 closed propagation cages in the Upper Mississippi River, Pool 4 (Frontenac), Minnesota.  One cage contained 1,400 juveniles, a new record. 

juvenile Higgins eye

An estimated 1,400 juvenile Higgins eye pearlymussels (Lampsilis higginsii) collected in 2006 from a single closed propagation cage in the Upper Mississippi River, Pool 4 (Frontenac), Minnesota.  Mussels are 15 months old.  Photo by Gary Wege, U.S. Fish and Wildlife Service.
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Last updated on December 21, 2006
http://www.fws.gov/midwest/mussel/highlights/2006_highlight2.html