Record Display for the EPA National Library Catalog
RECORD NUMBER: 223 OF 1390
|OLS Field Name||OLS Field Data|
|Main Title||Effects of Elevated Ammonia Levels on the Fingernail Clam, 'Musculium transversum', in Outdoor Experimental Streams.|
|Author||Zischke, J. A. ; Arthur, J. W. ;|
|CORP Author||Environmental Research Lab.-Duluth, Monticello, MN. Monticello Ecological Research Station. ;Saint Olaf Coll., Northfield, MN.|
|Additional Subjects||Ammonia ; Clams ; Water pollution ; Streams ; Concentration(Composition) ; Exposure ; Growth ; Survival ; Reproduction(Biology) ; Abundance ; Comparison ; Reprints ; Musculium transversum ; Fingernail clam|
The effects of ammonia on survival, growth, and reproduction of the fingernail clam. Musculium transversum were tested in outdoor experimental streams. In the summers of 1983 and 1984 caged clams were exposed in the streams. During the 1983 studies, the weekly mean NH 3 ranges in the low, medium and high concentration streams were, respectively, 0.02-0.08, 0.04-0.25 and 0.14-0.56 mg/l; in 1984 the ranges in the same streams were 0.04-0.20, 0.07-0.38 and 0.48-1.17 mg/L. In the first year studies, survival was highest (50-85%) in the control and low NH3 streams, lower (30-55%) in the medium NH3 stream and no clams survived the high NH3 treatment. Growth was also greater in the control and low NH3 streams.