plume were defined. Distributions and levels of bacteria and heavy metals 

 were studied to measure their release from the sediments. 



191. WELKER, B.D., "Movements of Marked Channel Catfish in the Little Sioux 

 River, Iowa," Transaction of the Ameriaan Fishery Society, Vol. 96, 

 No. 3, July 1967, pp. 351-353. 



Investigation of the movement of marked channel catfish lotaturus punctatus 

 in relation to channelization was initiated in 1964 on the Little Sioux River. 

 The U.S., Army Corps of Engineers completed rechanneling the lower 56 kilo- 

 meters of the river in 1957. The study area included the lower 96 kilometers so 

 that movement could be studied in both straightened and unstraightened sections. 

 There was no major difference in the direction of catfish movement between the 

 straightened and unstraightened sections of the river. Disregarding local 

 movement, 23.7 percent of recaptures in the unstraightened area moved upstream, 

 69.6 percent moved downstream, and 6.7 percent were recaptured at their release 

 site. In the straightened section, 25.8 percent moved upstream, 39.8 percent 

 moved downstream, and 24.4 percent were recaptured at their release site. 



192. WHITTEN, H.L., ROSENE, H.F., and HEDGPETH, J., "The Invertebrate Fauna 

 of Texas Coast Jetties; A Preliminary Survey," Publications of the 

 Institute of Marine Science, Vol. 1, No. 2, University of Texas, Austin, 

 Tex., 1950, pp. 53-87. 



An ecological survey of the marine invertebrate fauna was conducted on 

 the jetties of the Texas coast during June and July in 1938, 1939, and 1940. 

 The jetties studied are located at five tidal passes; these rocky areas con- 

 stitute a minor percentage of the total 644- kilometer-long Texas coast. This 

 study was confined primarily to the intertidal communities of the jetties. 

 There was a north-south change in the relative abundance of the major species 

 of jetty fauna related to salinity and wave action. The fauna on the jetty 

 represent a composite colonization from various habitats. A few species owe 

 their colonization to their free-living larvae. 



193. WINDOM, H.L., "Environmental Aspects of Dredging in Estuaries," Joiamal 

 of the Waterways, Harbors and Coastal Engineering Division, Vol. 98, 

 No. WW4, 1972, pp. 475-487. 



The chemical response of salt marsh estuarine sediments in the Intracoastal 

 Waterway to deposition of dredge materials was studied, along with the effect 

 of dredging and sediment deposition on water quality. Salt marsh plants were 

 destroyed by spoil deposition and the rate of reequilibration of marsh sediments 

 to their original state was dependent on the depth of dredge spoil deposit. In 

 natural and relatively unpolluted areas, dredging did not affect the water 

 quality. 



194. WINDOM, H.L., "Environmental Aspects of Dredging and Filling," Proceedings 

 of the Seminar on Planning and Engineering in the Coastal Zone, Coastal 

 Plains Center for Marine Development Service, Seminar Series No. 2, 

 Wilmington, N.C., 1972, pp. 53-61. 



Coastal zone alteration of habitats due to deposition of dredged material 

 and water quality impairment of the surrounding water during a dredging opera- 

 tion are examined. Marsh areas that have been covered with spoil material will 



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