Degree Name

Master of Science (MS)

Semester of Degree Completion

1975

Thesis Director

Leonard Durham

Abstract

Oxygen consumption rates of 51 green sunfish (Lepomis cyanellus, Rafinesque) were monitored over five hours exposure to Treflan E.C. concentrations of 0, 0.32, 0.56, 1.0, and 2.0 ppm. There was a great variation in the responses of the fish at each concentration; and Student's t-tests revealed no significant differences. However, graphs of the mean hourly oxygen consumption rates showed certain trends. During the fifth hour of exposure, there appears to be an acclimation to the Treflan at concentrations of 0.32 and 0.56 ppm; but no such acclimation at the higher concentrations of 1.0 and 2.0 ppm. Hourly oxygen consumption rates at 2.0 ppm Treflan fluctuated less than at the other concentrations. Also, Treflan concentrations of 0.56, 1.0, and 2.0 ppm altered the consumption rates of the larger fish more than those of the smaller fish.

Further tests with longer periods of exposure to Treflan are recommended to determine further reactions to the higher Treflan concentrations.

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