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Pregnant Pocketbook Mussel
Pregnant Pocketbook Mussel
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Title: Pregnant Pocketbook Mussel


Study chamber containing a pregnant pocketbook mussel (Lampsilis cardium) exposed to an elevated water temperature of 32 degrees Celsius. This mussel is showing signs of stress--lying on top of the substrate and unable to burrow.

The freshwater mussels that provide pearls for jewelry and nutrients to aquatic ecosystems may be further threatened by rising water temperatures in the Upper Mississippi River.

Nearly 70 percent of the 300 species of freshwater mussels in North America are in jeopardy of extinction, a situation that may increase in the future as a result of climate change and other stresses on aquatic ecosystems.  New research suggests that high water temperatures may cause mortality of pregnant females in the Upper Mississippi River, according to the USGS and the University of Wisconsin–La Crosse.

Location: La Crosse , WI, USA

Date Taken:

Photographer: Alissa Ganser
Photographer Email:
Photographer Organization: USGS

Usage: This image is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit the photo.


File Details:
Type: JPEG image - 5.48 MB
Dimensions: 2976 x 3968
Resolution: 180 dpi

Suggest an update to the information/tags?

General (Set) RSS Media RSS Spearfish Creek at Spearfish, SD Rhoads Fork Near Rochford, SD
In: Water collection

Tags: ClimateChange EndangeredSpecies Mussels UpperMississippiRiver Wisconsin



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