Record Display for the EPA National Library Catalog


Main Title Mortality of Brook Trout, Mottled Sculpins, and Slimy Sculpins during Acidic Episodes.
Author Gagen, C. J. ; Sharpe, W. E. ; Carline, R. F. ;
CORP Author Pennsylvania State Univ., University Park. Environmental Resources Research Inst. ;Pennsylvania Cooperative Fish and Wildlife Research Unit, University Park.;Corvallis Environmental Research Lab., OR.
Publisher 1993
Year Published 1993
Report Number EPA-R-814566-01-2; EPA/600/J-93/519;
Stock Number PB94-135043
Additional Subjects Trout ; Mortality ; Streams ; Aluminum ; Toxicity ; Concentration(Composition) ; Acids ; Tolerances(Physiology) ; pH ; Seasonal variations ; Exposure ; Reprints ; Brook trout ; Mattled sculpins ; Slimy sculpins
Library Call Number Additional Info Location Last
NTIS  PB94-135043 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 14p
Brook trout Salvelinus fontinalis, mottled sculpins Cottus bairdi, and slimy sculpins Cottus cognatus occur in many Pennsylvania streams that have depressed pH and elevated aluminum concentrations during episodes of high stream discharge (acidic episodes). The authors performed 20-d in situ cage exposures with these species to determine their relative sensitivities to field conditions. They also exposed fish in the laboratory to synthetic soft water, without added Al, to elevate possible effects of Al on sodium flux rates and pH toxicity. Exposures were in five streams; two with high pH (<5.60) and low Al concentrations (<80 micrograms/liter) and three with low pH and high Al levels. Exposures were during two low-discharge fall periods, when pH tends to be seasonally higher and Al concentrations lower, and two relatively high-discharge spring seasons, when lower pH and higher Al concentrations are typical. Few fish died (generally <10%) in the two streams that had higher pH and lower Al concentrations, whereas mortalities typically exceeded 20% and were as high as 100% during spring exposures in the streams with lower pH and elevated Al concentrations.