DEVELOPING A SAMPLING STRATEGY TO EXAMINE POPULATION TRENDS FOR THE ENDANGERED WINGED MAPLELEAF MUSSEL, Quadrula fragosa.

Daniel J. Hornbach, Mark Hove, Jill Medland and

Randy Ferrin

Dept. Biology, Macalester College, St. Paul, MN 55105

Bell Museum, Univ. Minnesota, Folwell Ave., St. Paul, MN 55108

St. Croix National Scenic Riverway, St. Croix Falls, WI 54024

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