Natural Resources Institute Aquatic Ecosystems

mussel group logo 2019


The freshwater mussel program of the Texas A&M Natural Resources Institute and Texas Water Resources Institute works to understand more about the population distribution, life history characteristics, and conservation status of Texas' freshwater mussels. Declining mussels serve as a possible barometer for the overall health of freshwater ecosystems, to which they contribute a number of important functions including filtration. Contact Dr. Charles Randklev for information about the freshwater mussel program at Dallas.


Freshwater mussels in Texas

The mussel team's research takes place as freshwater ecosystems experience a far greater biodiversity decline than what is seen in most other affected terrestrial ecosystems.

Declines have been especially severe for certain groups of aquatic biota including freshwater mussels, Unionidae, which are now considered the most imperiled of all aquatic fauna. Of the 300 mussel species known to have occurred in the United States, 12 percent are thought to be extinct; 23 percent are considered threatened or endangered.

Meanwhile, across Texas, distribution and abundance declines have led to the listing of 15 species —roughly 29 percent of Texas' 52 described species — as "threatened" at the state level. Of those, 12 species are either candidates for listing under the national Endangered Species Act (ESA) or are still being considered for protection under the ESA.


Visit the freshwater mussel group's weebly site here.




Host Fish
Determination &
Captive Propagation


Status Maps


Mussel Research Group

Dr. Charles Randklev

Dr. Charles Randklev portrait

Research Scientist, Natural Resources Institute
Principal Investigator, Freshwater Mussel Research

Texas A&M AgriLife Research

Alex Kiser

Michael deMoulpied

Xenia Rangaswami

Recent Publications

Find Dr. Charles Randklev's CV by clicking here and a comprehensive listing of his publications at Google Scholar

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