Now showing items 148-167 of 217

    • Natural Selection and Lake Superior Fisheries 

      Swenson, William A. (1982)
      During the past 10 years, I have spent between 20 to50 days per season on Lake Superior aboard one of the University research vessels, a commercial vessel, or sport trolling. Like most other sportsmen, I am thrilled to ...
    • NONYLPHENOL ANALYSIS 

      Brooke, Larry T. (1994-05-31)
      A study was undertaken in an earlier work assignment (No.1-12) in this contract to expose two species of fish in both short-term acute exposures and longer-term chronic exposures to nonylphenol. The following tests were ...
    • NONYLPHENOL TOXICITY 

      Brooke, Larry T. (1993-09-30)
      Several toxicity and bioconcentration tests were undertaken to study the effects of nonylphenol,,.-on aquatic organisms, It is desirable to know the relationship between the toxic effects of nonylphenol and 'its ...
    • NONYLPHENOL TOXICITY (No. 2-15) 

      Brooke, Larry T. (1994-05-31)
      During this work assignment (No. 2-15), tissue accumulations were measured in all fish stored in iso-octane from the short-term acute exposures. Since the unanalyzed fish have been stored in the freezer for six months, ...
    • o-Anisidine / Hazardous Substance Ecological Fact Sheet 

      Call, Daniel; Brooke, Larry (1988-07-21)
      Q-Anisidine is a yellowish liquid which becomes brownish with exposure to air. It is used in the manufacture of azo dyes. It is moderately soluble in water, and may enter the aquatic environment via discharges from ...
    • O-Cresol, 95-48-7 / Hazardous Substance Ecological Fact Sheet 

      Call, Daniel; Brooke, Larry (1988-09-21)
      2-Cresol (2-methylphenol) is a crystalline solid at temperatures up to 30° C, above which it is a yellowish liquid. It has a phenolic odor, and darkens with exposure to air and light. It is used as a disinfectant, ...
    • O-Toluidine, 95-53-4 / Hazardous Substance Ecological Fact Sheet 

      Call, Daniel; Brooke, Larry (1988-07-21)
      Q-Toluidine (2-aainotoluene, Q-methylaniline, 2-methyl benzenamine) is a manufactured chemical. It is used in the manufacture of various dyes, printing textiles, blue-black, and making various colors fast to acids. ...
    • O-Xylene, 95-47-6 / Hazardous Substance Ecological Fact Sheet 

      Call, Daniel; Brooke, Larry (1988-07-21)
      Q-Xylene is one of three isomers of commercial xylene. It is a flammable, colorless liquid of moderate solubility in water. Xylene is used as a solvent, as a raw material for the production of organic chemicals used ...
    • THE OJIBWA HEALTH STUDY 

      Dellinger, John A.; Brooke, Larry (1995-09-30)
      Great Lakes fish are known dietary sources of persistent organochlorine and heavy metal toxicants. The Ojibwa of the upper Great Lakes have a long history of relying upon the Great Lakes fishery for subsistence and ...
    • OPTIMIZING YIELD FROM WESTERN LAKE SUPERIOR COMMERICAL FISHERIES THROUGH SMELT STOCK ASSESSMENT 

      Swenson, William A.; Heist, Barry (1982)
      Acoustical and net sampling was conducted throughout western Lake Superior during 1978-1980 to obtain information on rainbow smelt (Osmerus mordax) abundance, the factors controlling smelt abundance and the influence ...
    • PRELIMINARY INVESTIGATION OF THE ROLE OF AQUATIC MACROPHYTES IN HEAVY METAL UPTAKE FROM WATER WITH COAL PARTICLES 

      Koch, Rudy G. (1981)
      A survey was made and representative samples of vascular macrophytes from the Superior, Wisconsin-Duluth, Minnesota Harbor were collected in August 1975 and stored in a frozen condition until processed. The processed samples ...
    • PROGRESS REPORT DULUTH SUPERIOR HARBOR FISHERY SURVEY 

      DeVore, Philip W. (1977-07-15)
      Field work for the Duluth-Superior Harbor Fishery Survey was initiated on 11 April. Sampling has been conducted with an electrofishing boat (generally us­ing 250 volt, 11 amp D.C. current), fyke nets {3 x6' front hoop, 40' ...
    • RAISIN RIVER/MONROE HARBOR SURVEY I / JULY 12-19, 1983 

      Northcott, C.E. (1983-08-12)
      Fathead minnows, 24 hr old, were shipped air freight from the EPA laboratory in Newtown, OH. The larval fathead minnows were exposed to 10 water sources from the Raisin River/Monroe Harbor area of southeastern MI. They ...
    • RED CLAY EROSION DEMONSTRATION RESEARCH FIRST ANNUAL REPORT 

      Koch, Rudy G. (1976-06-01)
      The central emphasis of this .study is to identify major vegetational compo­nents of the Little Balsam and Skunk Creek watersheds and to relate this cov­er to the erosion of the red clay soils. The examination of the ...
    • RED CLAY EROSION DEMONSTRATION RESEARCH SECOND ANNUAL REPORT 

      Koch, Rudy G.; Stackler, Susan H.; Koch, Lorraine M. (1977-06-09)
      Vegetation cover and related factors such as litter and organic content of soil, is known to be important in controlling and/or reducing erosion rates (Meeuwig 1971). Other factors such as slope, soil particle size, ...
    • Repeat toxicity tests of the amphipod, Gammarus pseudolimnaeus, wtih selenite and selenate 

      Brooke, Larry (1987-07-20)
      The Center for Lake Superior Environmental Studies (CLSES) of the University of Wisconsin-Superior has conducted two static acute toxicity tests with the amphipod Gammarus pseudolimnaeus exposed to sodium selenite(SeIV) ...
    • Report of the flow-through and static acute test comparisons with fathead minnow and acute tests with an amphipod and a cladoceran 

      Brooke, Larry (1987-08-31)
      The Center for Lake Superior Environmental Studies of the University of Wisconsin-Superior, Superior, Wisconsin 54880 has completed acute toxicity tests with eighteen organic compounds. Fathead minnows, Pimephales ...
    • Results of acute exposures to aluminum at pH >6.5 with planaria and daphids 

      Brooke, Larry (1985-07-25)
      Acute, static exposures with aluminum were completed at the campus of the University of Wisconsin-Superior (UW-S) using two species of freshwater organisms (brown planaria, Dugesia tigrina; daphnid, Daphnia magna). The ...
    • Results of freshwater exposures with various chemicals 

      Brooke, Larry T. (1991-01-30)
      Acute flow-through and static renewal exposures with biphenyl, butachlor, carbazole, dibenzofuran, 3,3'-dichlorobenzidine, 1,2- epoxyethylbenzene (styrene oxide), isophorone, isopropalin, oxychlordane, pehtachloroanisole, ...
    • SEDIMENT-ASSOCIATED POLLUTANTS AT SELECTED GREAT LAKES SITES AND THEIR EFFECTS UPON BIOTA 

      Call, Daniel J.; Brooke, Larry T. (1988-11-30)
      Progress was made during this quarter on (1) collection and culturing of test organisms, (2) development of an invertebrate and fish bioassay facility for sediments, (3) preparation for sediment mutagenicity assays ...