Showing items related by title, author, creator and subject.
Welchlin, Roger L. (Drake University, 1975-08)The problem. To calculate rates for birth, death, and natural increase of zooplankton found in an unpolluted artificial pond. This will serve as a basis for comparisons with other bodies of water to show man's effect upon ...
Hoekstra, Calvin W. (Drake University, 1973-08)The problem. To determine the distribution of benthic invertebrates in Red Rock Reservoir and to relate this distribution to the physiochemical characteristics of the substrate and bottom meter of water along with water ...