Theses and Dissertations


Title: Oxygen consumption of the bluegill bream, Lepomis macrochirus Rafinesque at various temperatures

Name: Counselman, Clarence James

Degree: MS

Chair: Dr. John S. Dendy

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1953

Pages: 54

Keywords: Bluegill,Lepomis macrochirus,Oxygen consumption,Temperature.

Abstract:

Measurements were made of rate of consumption of dissolved oxygen by bluegills of various sizes in sealed jars maintained at constant temperatures of 60, 70, 80, 90, and 100o F. As the temperature was increased from 60 to 90o F, the rate of oxygen consumption also was increased. Bluegills were unable to live for extended periods at 100o F: thus data collected at this temperature were not considered reliable. Small fish consumed more oxygen per unit weight than large ones. Increasing temperature had less effect on the rate of consumption of oxygen by small fish than by large fish. There was a noticeable trend for all fish to consume less oxygen in the morning than in the afternoon and evening. At 80o F bluegill showed a "group effect" which results in consumption of less oxygen per unit weight of fish where four or more fish were present per gallon of water than when only one fish was present. At 80o F the minimum concentration of dissolved oxygen in which fish survived was 0.5 parts per million. At 90o F it was 0.9 parts per million. Concentrations of carbon dioxide did not exceed 9.9 parts per million, and was not considered as a significant factor in the utilization of oxygen by bluegills.

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