Date of Award
Spring 2005
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Biological Sciences
Program/Concentration
Biology
Committee Director
Harold G. Marshall
Committee Member
William Resetarits
Committee Member
David Seaborn
Call Number for Print
Special Collections LD4331.B46 E434 2005
Abstract
Growth and abundance of heterotrophic dinoflagellate predators are generally attributed to the availability of algal prey. Several species of dinoflagellates feed on a wide variety of food types including fish. However the actual feeding preferences of dinoflagellates have been much less studied. In the few studies that have been carried out on dinoflagellate feeding preference, none have looked at possible factors that may affect preference. I conducted three experiments on the toxic dinoflagellate Pfiesteria piscicida and the related unnamed species Cryptoperidiniopsis brodyi which, (1) calculated the feeding preferences between algal Rhodomonas prey and fish blood cells and identified factors that effect the preferences, (2) looked for an effect of prior diet conditioning on the grazing rates of both species, and (3) compared the growth rates of both species from two different feeding histories. Data from these three experiments demonstrate that P. piscicida and C. brodyi feed on both algal and fish prey and have the ability to feed preferentially. Both species of dinoflagellates showed a strong preference for fish blood cells over Rhodomonas. Furthermore, the feeding preferences were influenced by total prey abundance, but not by prior diet conditioning.
Rights
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DOI
10.25777/9k2x-0361
Recommended Citation
Egerton, Todd A..
"Feeding Behavior and Conditioning in Two Heterotrophic Dinoflagellates"
(2005). Master of Science (MS), Thesis, Biological Sciences, Old Dominion University, DOI: 10.25777/9k2x-0361
https://digitalcommons.odu.edu/biology_etds/342