Texas Comptroller of Public Accounts

Meghan Hope

Senior Division Manager

Economic Growth and Endangered Species Management Division

Freshwater Mussel Research

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Central Texas Freshwater Mussels

Historic Distribution

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Surveys Locations

• Brazos River– Little River drainage

– Upstream of Possum Kingdom Reservoir

• Colorado River– Lower Colorado River (between

Longhorn Dam and Bay City Dam)

– Middle Colorado (between O.H. Ivy Lake and Lake Buchanan)

• Upper Guadalupe River– Upstream of Canyon Lake

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Smooth Pimpleback

Texas Pimpleback

Texas Fawnsfoot

Texas Fatmucket

False Spike

http://www.tamuirnrmussels.com/photos.html

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Lower Colorado

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Lower Colorado

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Lower Colorado

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Task 2: Applied Research

Auburn University

• Thermal and hypoxia tolerance experiments for adult and juvenile mussels

• Nitrogenous compounds and salinity tolerance experiments on adult mussels

• Turbidity tolerance experiments

• Desiccation tolerance on adult mussels

SMARC

Isotope Analysis

• Stable isotope analysis to evaluate relative contribution of each food source resources

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Environmental Flow Analysis

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Mark-recapture studies

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Texas Comptroller of Public Accounts