Long-term storage lipids and developmental evolution in echinoderms

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dc.contributor.author Prowse, TAA en
dc.contributor.author Falkner, I en
dc.contributor.author Sewell, Mary en
dc.contributor.author Byrne, M en
dc.date.accessioned 2015-01-21T03:03:52Z en
dc.date.issued 2009 en
dc.identifier.citation Evolutionary Ecology Research, 2009, 11 pp. 1069 - 1083 (15) en
dc.identifier.issn 1522-0613 en
dc.identifier.uri http://hdl.handle.net/2292/24198 en
dc.description.abstract Question: How is maternal investment of energy storage lipids linked to the evolution of development for echinoderms with larval phases? Hypotheses: Egg nutrients sustain development to the exotrophic larval stage in echinoderms with feeding (planktotrophic) larvae and to the exotrophic juvenile stage in species with nonfeeding (lecithotrophic) larvae. Whereas planktotrophic echinoderm development requires egg lipid reserves that are readily metabolized, lipids suitable for long-term energy storage might be more appropriate fuels for lecithotrophic development. Organisms: We considered closely related asteroid and ophiuroid species that possess a range of egg sizes and represent three modes of larval development (planktotrophy, planktonic lecithotrophy, benthic lecithotrophy). Methods: We used Iatroscan TLC-FID to quantify maternal investment of lipids on a per egg basis for each species and focused on egg content of the two dominant classes of energy storage lipid, triacylglycerol (TAG) and diacylglycerol ether (DAGE). Results: Energetic lipids in the small eggs of echinoderms with feeding larvae are primarily TAG, a class of short-term storage lipids. DAGE, which is metabolized more slowly than TAG, dominates the large eggs of echinoderms with non-feeding larvae. Increased deposition of DAGE lipids in the eggs of planktotrophic species may facilitate the transition to lecithotrophy. en
dc.relation.ispartofseries Evolutionary Ecology Research en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.evolutionary-ecology.com/notice.html en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Long-term storage lipids and developmental evolution in echinoderms en
dc.type Journal Article en
pubs.begin-page 1069 en
pubs.volume 11 en
pubs.author-url http://www.evolutionary-ecology.com/ en
pubs.end-page 1083 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 96582 en
pubs.org-id Science en
pubs.org-id Biological Sciences en
pubs.record-created-at-source-date 2010-09-01 en

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