Record Display for the EPA National Library Catalog


Main Title Flow Regime, Juvenile Abundance, and the Assemblage Structure of Stream Fishes.
Author Schlosser, I. J. ;
CORP Author North Dakota Univ., Grand Forks. Dept. of Biology.;Corvallis Environmental Research Lab., OR.
Year Published 1985
Report Number EPA-R-806391; EPA/600/J-85/356;
Stock Number PB86-175510
Additional Subjects Fishes ; Ecology ; Stream flow ; Abundance ; Populations ; Sampling ; Breeding ; Seasonal variations ; Density measurement ; Age ; Comparison ; Tables(Data) ; Illinois ; Reprints ; Low flow ; Discharge(Water)
Library Call Number Additional Info Location Last
NTIS  PB86-175510 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
The assemblage of fishes in a second-order stream in east-central Illinois was compared through seine sampling for two years with distinctly different flow regimes. In both years adult (age 0) fish were most abundant in late spring and early summer while juvenile (age 0) abundance peaked in late summer or autumn. Total density of adult fish differed little between years but large changes in juvenile abundance occurred between years in association with differences in hydrologic regime. High stream discharge had little influence on abundance of juvenile suckers and darters, but some minnow species and all sunfish species exhibited large increases in juvenile abundance during stable to low flow conditions. The largest increase in juvenile abundance occurred among species with prolonged breeding seasons. (Copyright (c) 1985 by the Ecological Society of America.)