Supplementation with Sterols Improves Food Quality of a Ciliate for Daphnia magna


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MARTIN-CREUZBURG, Dominik, Alexandre BEC, Eric von ELERT, 2006. Supplementation with Sterols Improves Food Quality of a Ciliate for Daphnia magna. In: Protist. 157(4), pp. 477-486. ISSN 1434-4610. Available under: doi: 10.1016/j.protis.2006.07.001

@article{MartinCreuzburg2006Suppl-8528, title={Supplementation with Sterols Improves Food Quality of a Ciliate for Daphnia magna}, year={2006}, doi={10.1016/j.protis.2006.07.001}, number={4}, volume={157}, issn={1434-4610}, journal={Protist}, pages={477--486}, author={Martin-Creuzburg, Dominik and Bec, Alexandre and Elert, Eric von} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:language>eng</dc:language> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dcterms:hasPart rdf:resource=""/> <dcterms:isPartOf rdf:resource=""/> <dspace:hasBitstream rdf:resource=""/> <dcterms:rights rdf:resource=""/> <dc:contributor>Bec, Alexandre</dc:contributor> <dcterms:available rdf:datatype="">2011-03-24T17:44:25Z</dcterms:available> <dc:contributor>Martin-Creuzburg, Dominik</dc:contributor> <dspace:isPartOfCollection rdf:resource=""/> <dcterms:bibliographicCitation>First publ. in: Protist 157 (2006), pp. 477-486</dcterms:bibliographicCitation> <dc:rights>terms-of-use</dc:rights> <dc:creator>Bec, Alexandre</dc:creator> <dc:creator>Martin-Creuzburg, Dominik</dc:creator> <dc:creator>Elert, Eric von</dc:creator> <bibo:uri rdf:resource=""/> <dc:contributor>Elert, Eric von</dc:contributor> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:title>Supplementation with Sterols Improves Food Quality of a Ciliate for Daphnia magna</dcterms:title> <dcterms:abstract xml:lang="eng">Experimental results provide evidence that trophic interactions between ciliates and Daphnia are constrained by the comparatively low food quality of ciliates. The dietary sterol content is a crucial factor in determining food quality for Daphnia. Ciliates, however, presumably do not synthesize sterols de novo. We hypothesized that ciliates are nutritionally inadequate because of their lack of sterols and tested this hypothesis in growth experiments with Daphnia magna and the ciliate Colpidium campylum. The lipid content of the ciliate was altered by allowing them to feed on fluorescently labeled albumin beads supplemented with different sterols. Ciliates that preyed upon a sterol-free diet (bacteria) did not contain any sterols, and growth of D. magna on these ciliates was poor. Supplementation of the ciliates food source with different sterols led to the incorporation of the supplemented sterols into the ciliates cells and to enhanced somatic growth of D. magna. Sterol limitation was thereby identified as the major constraint of ciliate food quality for Daphnia. Furthermore, by supplementation of sterols unsuitable for supporting Daphnia growth, we provide evidence that ciliates as intermediary grazers biochemically upgrade unsuitable dietary sterols to sterols appropriate to meet the physiological demands of Daphnia.</dcterms:abstract> <dc:format>application/pdf</dc:format> <dc:date rdf:datatype="">2011-03-24T17:44:25Z</dc:date> <dcterms:issued>2006</dcterms:issued> </rdf:Description> </rdf:RDF>

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