Thesis (M.S.)--Eastern Illinois University. / Includes bibliographical references (leaves 23-25).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1975. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 121-125).

Thesis (M.S.)--University of Missouri-Columbia, 2007. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 24, 2008) Includes bibliographical references.

Growth experiments were conducted with bluegill, Lepomis macrochirus, for 102 days under three different photoperiods at 26 C. One daily photoperiod increased from 15.5 to 19.8 hours, another decreased from 15.5 to 12.3 hours, and a third was held constant at 15.5 hours. Growth, food consumption (mealworms, Tenebrio molitor), and food conversion efficiency were evaluated for bluegill under each set of conditions.Under the conditions used in this experiment there was no apparent effect of photoperiod on the growth of bluegill. This was true for all measurements of growth, food consumption, and food conversion efficiency. It was also true when males and females were compared for each of these measurements.

Thesis (M.S.)--Virginia Polytechnic Institute, 1962. / Vita. Abstract. Includes bibliographical references (leaves 74-80). Also available via the Internet.

Thesis (M.S.)--University of Wisconsin -- La Crosse, 2009. / Includes bibliographical references (leaves 68-76)

No description available.

Residency or emigratory responses were triggered in bluegills 6.0-8.0 cm TL and 10.0-12.0 cm TL by availability of resources. Individuals became residents if resources were present and not at carrying capacity. Individuals in excess of carrying capacity emigrated. Carrying capacity of bluegills 6.0-8.0 cm TL increased with increased food availability. Carrying capacity also increased with increased cover. Bluegills 10.0-12.0 cm TL did not respond to changes in cover. The two sizes reacted differently when the initial number introduced into pools was varied. Single bluegills 6.0-8.0 cm TL established residency whereas bluegills 10.0-12.0 cm TL required the presence of at least one other bluegill before establishing residency. Competition between size classes were prevented by habitat segregation in which smaller fish used areas with cover and larger fish areas of open water. These results indicate that bluegills have evolved innate, stereotypic fixed action patterns for individually assessing resources by becoming residents if resources are present and numbers below carrying capacity or emigrating if resources are absent or numbers at carrying capacity. These findings suggest that the long history of overpopulation and stunting of bluegills in closed areas is due to the absence of an emigratory avenue.

A study of reproduction and spawning habits of the bluegill in a particular lake must include adequate samples for each period of the year. This will make it possible to determine the number of eggs in each spawn and the frequency of spawning. The number of spawns and average egg production for various sized fish shows the pattern of activity and makes possible further basic research.

Experiments were conducted to determine the effect of aquarium volume and feeding regimen on growth in length and weight and on food conversion efficiency by bluegill fed rations of mealworms. Two 30 day periods were utilized for each study. Part one, which examined the effect of aquarium volume on growth extended from January 20 to February 18 and from March 27 to April 25, 1972. Part two, which examined the effect of multiple feedings compared with single feedings on growth, ran from May 30 to June 28 and from July 1 to July 30, 1972. The studies were conducted in a controlled environment aquarium. Food consumption, growth and food conversion by individual fish in each experiment were monitored closely. All conditions with the exception of the testable variable were held as constant as possible. Water quality was monitored and judged to be within acceptable limits for fish culture.Aquarium volumes of 5, 10 and 15 liters did not affect growth in length and weight or food conversion efficiency of individually held bluegill.A 30 day daily regimen of one feeding compared with three feedings of a constant ration of mealworms resulted in significantly greater length, weight and conversion efficiency for multiple-fed male bluegill. After 60 days length and weight were not significantly different but conversion efficiency was significantly greater for multiple-fed male bluegill.