Survey of Freshwater Mussels (Pelecypoda: Unionacea) at Selected Sites in Pools 11 Through 24 of the Mississippi River.
Abstract
The present study is a continuation of the Corp's effort to evaluate mussel populations, particularly rare or Endangered species, in channel maintenance areas and to determine mitigative alternatives to minimize any possible deleterious impacts. Thirty-two sites in the USACOE Rock Island District of the Mississippi River were examined in 1979 and 1980. Twenty-nine of these sites had a history of channel maintenance activity or were scheduled for maintenance operations in the near future. In addition, three areas supporting commercially valuable mussel beds were surveyed for comparative purposes. Primary emphasis at each survey area was placed on documenting the occurrance of special status species. Special status species include: (1) mussels which are now listed as federally protected Endangered species; (2) mussels under Notice of Review for possible addition of the U.S. List of Endangered and Threatened Wildlife and Plants; or (3) rare species which may occur in the Mississippi River. The nationally Endangered species L. higginsii, Lampsilis orbiculata and Proptera (=Potamilus) capax; the species under Notice of Review, Cumberlandia monodonta and Leptodea leptodon; and the rarely collected species Simpsoniconcha ambigua are mussels which have been recorded in this region of the Mississippi River and quality as special status species. Keywords: Pelecypoda, Unionacea.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1981
- Accession Number
- ADA189740