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040 |aCaOODSP|beng|erda|cCaOODSP
041 |aeng|bfre
043 |an-cn---
0861 |aEn13-5/05-186E-PDF
1001 |aSchlechtriem, C., |eauthor.
24510|aEffect of temperature on the fatty acid composition and temporal trajectories of fatty acids in starving Daphnia pulex (Crustacea, Cladocera) / |cC. Schlechtriem, M.T. Arts and I.D. Zellmer.
24613|aFood chain effects of sublethal ultraviolet radiation on subarctic Daphnia pulex - a field and laboratory study
24617|aChronic effects of UV radiation on Daphnia pulex
264 1|aBurlington, Ontario, Canada : |bNational Water Research Institute, Environment Canada, Canada Centre for Inland Waters, |cSeptember 2006.
300 |a1 online resource (pages 515-531) : |bgraphs.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aNWRI contribution ; |v05-186
500 |aTitle from cover.
500 |aDigitized edition from print [produced by Environment and Climate Change Canada].
504 |aIncludes bibliographical references.
520 |a"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.
546 |aIncludes abstract and summary in English and French.
69207|2gccst|aUltraviolet radiation
693 4|aUnsaturated fatty acids
7001 |aArts, Michael Theodore, |d1958- |eauthor.
7001 |aZellmer, Iris D., |eauthor.
7101 |aCanada. |bEnvironment Canada.
7102 |aCanada Centre for Inland Waters.
7102 |aNational Water Research Institute (Canada)
830#0|aNWRI contribution ;|v05-186.|w(CaOODSP)9.844121
85640|qPDF|s1.59 MB|uhttps://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-05-186-eng.pdf