||Effect of Long-term Reduction and Diel Fluctuations in Dissolved Oxygen on Spawning of Black Crappie, 'Pomoxis nigromaculatus'.
Carlson, Anthony R. ;
Herman, Lawrence J. ;
||Environmental Research Lab.-Duluth, MN.
Fresh water fishes ;
Dissolved gases ;
Pomoxis nigromaculatus ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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.
||Pub. in Transactions of the American Fisheries Society, v107 n5 p742-746, 1978.
|NTIS Title Notes
||Reprint: Effect of Long-term Reduction and Diel Fluctuations in Dissolved Oxygen on Spawning of Black Crappie, 'Pomoxis nigromaculatus'.
|PUB Date Free Form
||6C; 57H; 57Z
||PC A02/MF A01