An Empirical Fingernail Clam Model for Upper Mississippi River Pools 7 and 8.

Abstract

Fingernail clams (Sphaeriidae) are important food sources for fish and migrating waterfowl in the Upper Mississippi River (UMR). Historically, fingernail clam densities ranged from 1,000 - 10,000 m-2 (per square meter) in parts of the UMR. Recent studies indicate that fingernail clam populations may be on the decline. In 1975, lower Pool 8 had fingernail clam densities as high as 2,400 m-2. More recent sampling (yearly since 1992) conducted by personnel from the Long Term Resource Monitoring Program, the U.S. Fish and Wildlife Service, and the Wisconsin Department of Natural Resources have shown fingernail clam densities averaging < 50 m-2 in lower Pool 8 of the UMR.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1998
Accession Number
ADA349625

Entities

People

  • Randy W. Burkhardt
  • Shawn E. Weick

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Army Corps Of Engineers
  • Demography
  • Electronic Mail
  • Environmental Management
  • Fingernails
  • Flow
  • Geological Surveys
  • Hydraulic Models
  • Mississippi
  • Mississippi River
  • Models
  • Natural Resources
  • Rivers
  • Statistical Sampling
  • Vegetation
  • Water
  • Water Flow

Readers

  • Riverine Ecology