Inaug.-Diss.--Kiel. / Lebenslauf. Also pub. in Wissensch. Meeresuntersuchungen. Neue Folge, Abt. Kiel, Bd. 12, p. [121]-132. "Literaturangaben": p. [15].

Thesis--Kiel. / Lebenslauf. Also pub.; in Wissenschaftliche meeresuntersuchungen. Neue folge, Abt. Kiel, Bd. 11, p. 347-365. Includes bibliographical references.

No description available.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1965. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

The alternation between a summer diatom population and a winter nanoflagellate population in Saanich Inlet is documented. Factors controlling the winter dominance by nanoflagellates, as well as the spring and fall transitions, are considered. Field monitoring of temperature, salinity, light, nitrate and silicate concentrations, and zooplankton size and abundance was conducted for the year November, 1975 to October, 1976 and compared with the pattern of phytoplankton succession during that time. This was supplemented with laboratory experimentation on the effects of light, temperature and photoperiod, as well as metabolic excretions and hydrocarbon pollution, on the growth of diatoms and nanoflagellates in unialgal culture and natural populations. Factors which were considered to be non-contributory to the winter dominance by flagellates included nutrient concentrations, grazing, excretions, and hydrocarbon pollution. Factors of some importance included temperature, photoperiod and water stability. The single factor of major importance was light intensity. Diatoms were found to be incapable of growth at winter light levels while flagellates were able to do so, due to their ability to maintain themselves high in the water column, and possibly due to a capacity for heterotrophy. A qualitative model is presented which relates the succession of phytoplankton in Saanich Inlet to temporal changes in various environmental parameters. / Science, Faculty of / Zoology, Department of / Graduate

No description available.

No description available.

Thesis (Ph.D.)--Brown University, 2005. / Vita. Thesis advisor: Kenneth S. Breuer. Includes bibliographical references (leaves 130-141). Also available online.

This study was begun with three purposes in mind. One was to develop a better medium for the cultivation of flagellate protozoans of the genus Trichomonas by varying the viscosity and nutrient content of the constituents. The second was to determine, by rates of division, the effects of various antibiotics upon axenic cultures, and the third, was to compare division rates in various media which did not contain antibiotics. Since the few axenic cultures which were obtained lasted a maximum of four hours, the emphasis of the problem was shifted to the behavior of Trichomonas augusta growing in association with bacteria and molds. Under these conditions, attention was focused upon the relationship of bacteria and molds to protozoan population peaks, time of decline, adaptation times, and longevity of cultures.

No description available.