Biology and Ecology of the Threatened Inflated Heelsplitter Mussel, Potamilus inflatus, in the Black Warrior and Tombigbee Rivers, Alabama, June 1994.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
Pagination or Media Count:
The biology and ecology of the inflated heelsplitter mussel Potarnilus inflatus, listed as threatened, was studied at dredged material disposal areas, adjacent areas unaffected by disposal, and two stable gravel bars on the Black Warrior and Tombigbee BWT rivers in July 1994. Objectives were to a determine density, size, and age of P. inflatus in siltsand substratum at areas affected and unaffected by disposal of dredged material b determine density, size, and age of P. inflatus at high-quality, stable gravel bars never affected by dredging c collect data on water depth, velocity, and substratum type where P. inflatus was found and d examine the ability of P. inflatus to rebury after being dislodged from the substratum and to extricate itself after being buried in sand. Mean density individualssquare meter, i standard error of the mean of P. inflatus at a gravel bar immediately downriver of Demopolis Lock and Dam 0.3, iO.17 was substantially greater than density in fine-grained sediments unaffected by dredged material disposal 0.0097, iO.0029 or in disposal areas used in 1993 0.005, iO.0015. Recently used disposal areas supported large and small mussels, indicating that this species populates these areas through natural recruitment and dispersal by high water.
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