Record Display for the EPA National Library Catalog


Main Title Effect of Long-term Reduction and Diel Fluctuations in Dissolved Oxygen on Spawning of Black Crappie, 'Pomoxis nigromaculatus'.
Author Carlson, Anthony R. ; Herman, Lawrence J. ;
CORP Author Environmental Research Lab.-Duluth, MN.
Year Published 1978
Report Number EPA/600/J-78/086;
Stock Number PB-290 671
Additional Subjects Fresh water fishes ; Oxygen ; Fishes ; Exposure ; Concentration(Composition) ; Simulation ; Behavior ; Reproduction(Biology) ; Dissolved gases ; Requirements ; Embryos ; Fecundity ; Reprints ; Pomoxis nigromaculatus ; Black crappie
Library Call Number Additional Info Location Last
NTIS  PB-290 671 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 5p
Mature black crappies were exposed over winter in the laboratory to constant dissolved oxygen concentrations near 2.5, 4.0, 5.5, and 7.0 mg/liter. Starting on 26 April during a simulated spring-to-summer rise in water temperature, some were continued at the original oxygen concentrations while others were subjected to mean diel fluctuations ranging from 0.8 to 1.9 mg O2/liter above and below the original concentrations. Controls were maintained at concentrations near air saturation. No spawning occurred at the lowest fluctuating treatment of 1.8 to 4.1 mg/liter. This treatment also caused behavioral aberrations as the water temperature reached 20C. Successful spawning occurred during all other treatments.