Effect of temperature on the fatty acid composition and temporal trajectories of fatty acids in starving Daphnia pulex (Crustacea, Cladocera) / C. Schlechtriem, M.T. Arts and I.D. Zellmer.: En13-5/05-186E-PDF
"Poikilothermic organisms accumulate highly unsaturated fatty acids (HUFA) in their lipids at reduced temperatures to maintain cell membrane fluidity. In this study we investigated the effect of temperature on temporal trajectories of fatty acids of starving Daphnia pulex cultured on a HUFA-free diet. D. pulex populations were maintained for one month at 22°C and 11°C and were fed the chlorophyte Ankistrodesmus falcatus. We observed "trophic upgrading" of C18 fatty acid precursors to eicosapentaenoic acid (EPA; 20:5n3) and arachidonic acid (ARA; 20:4n6) in D. pulex. We showed that long term exposure to cold temperature causes a significant increase in EPA. HUFA such as ARA and EPA are highly conserved during starvation. Therefore, D. pulex has the biosynthetic capacity to adjust and to maintain the content of HUFA required to survive at low temperatures"--Abstract.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.872262&sl=0
| Department/Agency | Canada. Environment Canada. Canada Centre for Inland Waters. National Water Research Institute (Canada) |
|---|---|
| Title | Effect of temperature on the fatty acid composition and temporal trajectories of fatty acids in starving Daphnia pulex (Crustacea, Cladocera) / C. Schlechtriem, M.T. Arts and I.D. Zellmer. |
| Variant title | Food chain effects of sublethal ultraviolet radiation on subarctic Daphnia pulex - a field and laboratory study Chronic effects of UV radiation on Daphnia pulex |
| Series title | NWRI contribution ; 05-186 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| Note(s) | Title from cover. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. Includes abstract and summary in English and French. |
| Publishing information | Burlington, Ontario, Canada : National Water Research Institute, Environment Canada, Canada Centre for Inland Waters, September 2006. |
| Author / Contributor | Schlechtriem, C., author. Arts, Michael Theodore, 1958- author. Zellmer, Iris D., author. |
| Description | 1 online resource (pages 515-531) : graphs. |
| Catalogue number |
|
| Subject terms | Ultraviolet radiation Temperature Unsaturated fatty acids |