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Figure 1: Comparison of Historic Mussel Harvest, 1989-1991
Comparison of Historic Mussel Harvest, 1989-1991
Figure 2: Comparison of Historic Mussel Harvest and Price per Ton, 1894-1950
Comparison of Historic Mussel Harvest and Price per Ton, 1894-1950
Figure 6. Age frequency of washboard mussels sampled by biologists in 1995-1998.
Age frequency of washboard mussels sampled by biologists in 1995-1998.
Figures 2 and 3: Harvest and Price per Pound of Threeridge and Washboard
Harvest and Price per Pound of Threeridge and Washboard
Figures 4 and 5: Threeridge and Washboard Harvest vs. Price per Pound
Threeridge and Washboard Harvest vs. Price per Pound
Abundance of native and zebra mussels (Dreissena polymorpha) at the East Channel Reference Site within the Prairie du Chien Essential Habitat Area, Pool 10, Upper Mississippi River, Wisconsin.
Abundance of native and zebra mussels (Dreissena polymorpha) at the East Channel Reference Site within the Prairie du Chien Essential Habitat Area, Pool 10, Upper Mississippi River, Wisconsin.

Density of native mussels at Essential Habitat Areas and secondary habitats on the Upper Mississippi River

Density of native mussels at Essential Habitat Areas and secondary habitats on the Upper Mississippi River
Abundance (number/liter) of zebra mussel veligers on the Upper Mississippi River, Locks and Dams 2 through 19
Abundance (number/liter) of zebra mussel veligers
Catch per unit effort of Higgins’ eye pearlymussels (Lampsilis higginsii) and other native mussels, and density of zebra mussels (Dreissena polymorpha) in 2002 at several locations on the Upper Mississippi River.
Catch per unit effort of Higgins’ eye pearlymussels (Lampsilis higginsii) and other native mussels, and density of zebra mussels (Dreissena polymorpha) in 2002 at several locations on the Upper Mississippi River.

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Last updated on September 2, 2003
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