ATTENTION: The works hosted here are being migrated to a new repository that will consolidate resources, improve discoverability, and better show UTA's research impact on the global community. We will update authors as the migration progresses. Please see MavMatrix for more information.
Show simple item record
dc.contributor.author | Shannon, Stephen Paul | en_US |
dc.date.accessioned | 2007-08-23T01:56:04Z | |
dc.date.available | 2007-08-23T01:56:04Z | |
dc.date.issued | 2007-08-23T01:56:04Z | |
dc.date.submitted | April 2006 | en_US |
dc.identifier.other | DISS-1113 | en_US |
dc.identifier.uri | http://hdl.handle.net/10106/109 | |
dc.description.abstract | Flagellate prey selection appears to depend on morphological characteristics of prey such as cell size and motility, as well as on physiochemical characteristics such as digestibility and cell surface characteristics. Pseudomonas fluorescens was grown in chemostats at four dilution rates (0.03, 0.06, 0.10, 0.13 h-1) and three temperatures (14, 20, 28°C) to produce cells of varying morphological characteristics (cell size) and physiochemical characteristics or food quality (as determined by the C:N:P ratio). Heat-killed bacteria of a given food quality were prepared and used to grow the flagellate Ochromonas danica. Ingestion and digestion rates were determined using fluorescently labeled bacteria of the same food quality as the bacteria supporting growth. Ingestion rates were affected by both food quality and cell size. Cells of high food quality (low carbon:element ratio) were ingested at higher rates than cells of low food quality. Multiple regression analysis indicated that cell size also influenced ingestion rate but to a much lesser extent than did food quality. Digestion rates were not correlated with either food quality or cell size. Results suggest that flagellates my use chemosensory cues to preferentially select food items. | en_US |
dc.description.sponsorship | Chrzanowski, Thomas | en_US |
dc.language.iso | EN | en_US |
dc.publisher | Biology | en_US |
dc.title | Comparison Of The Ingestion And Digestion Rates Of Ochromonas danica Grazing On Pseudomonas fluorescens Of Varying Food Quality | en_US |
dc.type | Ph.D. | en_US |
dc.contributor.committeeChair | Chrzanowski, Thomas | en_US |
dc.degree.department | Biology | en_US |
dc.degree.discipline | Biology | en_US |
dc.degree.grantor | University of Texas at Arlington | en_US |
dc.degree.level | doctoral | en_US |
dc.degree.name | Ph.D. | en_US |
dc.identifier.externalLink | https://www.uta.edu/ra/real/editprofile.php?onlyview=1&pid=79 | |
dc.identifier.externalLinkDescription | Link to Research Profiles | |
Files in this item
- Name:
- umi-uta-1113.pdf
- Size:
- 793.2Kb
- Format:
- PDF
This item appears in the following Collection(s)
Show simple item record