KOPS - The Institutional Repository of the University of Konstanz

Dietary polyunsaturated fatty acid supply improves Daphnia performance at fluctuating temperatures, simulating diel vertical migration

Dietary polyunsaturated fatty acid supply improves Daphnia performance at fluctuating temperatures, simulating diel vertical migration

Cite This

Files in this item

Files Size Format View

There are no files associated with this item.

ISANTA NAVARRO, Jana, Matthias FROMHERZ, Michelle DIETZ, Bettina ZEIS, Anke SCHWARZENBERGER, Dominik MARTIN-CREUZBURG, 2019. Dietary polyunsaturated fatty acid supply improves Daphnia performance at fluctuating temperatures, simulating diel vertical migration. In: Freshwater Biology. 64(10), pp. 1859-1866. ISSN 0046-5070. eISSN 1365-2427. Available under: doi: 10.1111/fwb.13377

@article{IsantaNavarro2019-10Dieta-46709, title={Dietary polyunsaturated fatty acid supply improves Daphnia performance at fluctuating temperatures, simulating diel vertical migration}, year={2019}, doi={10.1111/fwb.13377}, number={10}, volume={64}, issn={0046-5070}, journal={Freshwater Biology}, pages={1859--1866}, author={Isanta Navarro, Jana and Fromherz, Matthias and Dietz, Michelle and Zeis, Bettina and Schwarzenberger, Anke and Martin-Creuzburg, Dominik} }

Dietary polyunsaturated fatty acid supply improves Daphnia performance at fluctuating temperatures, simulating diel vertical migration Schwarzenberger, Anke Zeis, Bettina Martin-Creuzburg, Dominik Dietz, Michelle Schwarzenberger, Anke Zeis, Bettina eng Dietz, Michelle 2019-10 Isanta Navarro, Jana 2019-08-21T11:28:43Z Isanta Navarro, Jana 2019-08-21T11:28:43Z Fromherz, Matthias Fromherz, Matthias Martin-Creuzburg, Dominik 1. Diel vertical migration (DVM) is a common predator avoidance strategy of zooplankton. Migration to deeper water layers during the day to escape visually hunting predators is most likely to require physiological adaptations to periodically changing temperatures. Polyunsaturated fatty acids (PUFA) play crucial roles in membrane temperature acclimation. Exposure to cold temperatures typically results in an increase in the relative abundance of PUFA in cell membranes and PUFA requirements of Daphnia increase with decreasing temperatures.<br /><br />2. To assess the role of dietary PUFA in coping with temperature fluctuations experienced during DVM, we reared Daphnia magna at either constantly warm or fluctuating temperatures, simulating DVM both with and without dietary PUFA supplementation.<br /><br />3. We show that the well‐known positive effect of dietary eicosapentaenoic acid supplementation on offspring production and population growth rates of D. magna is more pronounced at alternating temperatures than at constantly warm temperatures. Exposure to alternating temperatures caused modification in body PUFA concentrations and, consequently, increased lipid peroxidation. However, detrimental effects of lipid peroxidation were not evident.<br /><br />4. Our data demonstrate that the capacity to cope with the distinct temperature fluctuations experienced during DVM increases with dietary eicosapentaenoic acid supplementation, suggesting that an adequate dietary PUFA supply is crucial especially for migrating Daphnia populations. A dietary deficiency in long‐chain PUFA may thus severely constrain predator evasion, potentially resulting in increased mortality and cascading effects on lower trophic levels.

This item appears in the following Collection(s)

Search KOPS


Browse

My Account