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scheme has resulted in increased fledging rates and, correspondingly, an increase in the population of the birds. The present hydrograph is very beneficial to the least tern and piping plover.

This investigation was conducted and completed by necessity in a short time. The study should be expanded for a longer duration; specifically the duration should be extended to include 1956- to present information. This investigation should be expanded to evaluate conditions of other sites in addition to the upstream conditions at Sioux City, Iowa, which this investigation emphasized. Also, additional procedures and analytical tools should be evaluated as to their usefulness.


Barnichol, Paul G., and Starrett, William C., 1951, Commercial and sport fishes of the Mississippi River between Caruthersville, Missouri, and Dubuque, Iowa: Bulletin of Illinois Natural History Survey, Urbana, Ill., v. 25, art. 5.

Beacom, William M., 2003, a review of 200 years of information about the least tern and piping plover relative to the Missouri River: Missouri River Technical Committee of the Siouxland Chamber of Commerce, Sioux City, Iowa, 9 p.

Berg, Rodney K., 1981, Fish populations of the wild and scenic Missouri River, Montana: Montana Department of Fish, Wildlife and Parks Restoration Project FW-3-R, Job 1-A, 242 p.

Galat, David L., and Clark, Sandra J., 2002,Fish spawning and discharge- temperature coupling along the Missouri River: 6th Annual Missouri River Natural Resources Conference, South Sioux City, Nebraska, April 21-24.

Goode, George B., 1884, The fisheries and fishes industry of the United States: U.S. Commission of Fish and Fisheries, GPO, 895 p.

Gorman, Joseph, 2003, written communication: U.S. Geological Survey, Council Bluffs, Iowa.

Hardy, John W., 1957, Least tern of the Mississippi Valley: Museum of Michigan State University, Biological Series, v. no. 1.


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