Evolution of maternal lipid provisioning strategies in echinoids with non-feeding larvae: selection for high-quality juveniles

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dc.contributor.author Byrne, M
dc.contributor.author Sewell, MA
dc.date.accessioned 2022-06-16T02:50:50Z
dc.date.available 2022-06-16T02:50:50Z
dc.date.issued 2019-05-09
dc.identifier.citation (2019). Marine Ecology Progress Series, 616, 95-106.
dc.identifier.issn 0171-8630
dc.identifier.uri https://hdl.handle.net/2292/59923
dc.description.abstract In marine invertebrates where larval planktotrophy is the ancestral life history, the evolutionary switch to lecithotrophy depended on modifications of oogenesis to produce energy-rich eggs that support development to the juvenile stage. In echinoderms, this involved a change from small eggs dominated by readily metabolised triacylglycerol (TAG) to large eggs containing various types of energetic storage lipids. We characterised lipid provisioning in the large (400 µm diameter) eggs of the echinometrid sea urchin Heliocidaris erythrogramma which has lecithotrophic larvae to compare with the small (90 µm diameter) eggs of the planktotroph H. tuberculata. We also investigated egg lipids in temnopleurids with contrasting modes of development: Temnopleurus alexandri and Holopneustes purpurascens (egg diameter: 125 and 600 µm, respectively). In the planktotrophs, TAG was the major energetic lipid. Egg energetic lipids in the lecithotrophs were largely diacylglycerol ether (DAGE) with TAG and wax ester also present. We used rapid juvenile development in H. erythrogramma to characterise lipid depletion through metamorphosis to the 14 d old juvenile. Larval development did not significantly deplete energetic lipids, with 70% of the DAGE remaining for the juvenile. TAG supported larval development with a 20−30% decrease by Day 3 with no further depletion to Day 14. DAGE levels decreased around metamorphosis, followed by a gradual depletion, but 49% of these reserves remained on Day 14. Thus, DAGE provisioning provides a significant nutritive buffer for a considerable time post settlement. Selection to produce a high-quality juvenile has driven egg evolution in echinoids with lecithotrophic development.
dc.language en
dc.publisher Inter-Research Science Center
dc.relation.ispartofseries Marine Ecology Progress Series
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.
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm
dc.rights.uri https://www.int-res.com/journals/open-access/
dc.subject Science & Technology
dc.subject Life Sciences & Biomedicine
dc.subject Physical Sciences
dc.subject Ecology
dc.subject Marine & Freshwater Biology
dc.subject Oceanography
dc.subject Environmental Sciences & Ecology
dc.subject Eggs
dc.subject Evo-devo
dc.subject Planktotrophy
dc.subject Lecithotrophy
dc.subject Metamorphosis
dc.subject Heliocidaris Holopneustes
dc.subject Echinoidea
dc.subject SEA-URCHIN
dc.subject EGG SIZE
dc.subject JELLY COATS
dc.subject PERFORMANCE
dc.subject 0405 Oceanography
dc.subject 0602 Ecology
dc.subject 0608 Zoology
dc.title Evolution of maternal lipid provisioning strategies in echinoids with non-feeding larvae: selection for high-quality juveniles
dc.type Journal Article
dc.identifier.doi 10.3354/meps12938
pubs.begin-page 95
pubs.volume 616
dc.date.updated 2022-05-16T05:27:43Z
dc.rights.holder Copyright: Inter-Research en
pubs.author-url http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000485728900008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=6e41486220adb198d0efde5a3b153e7d
pubs.end-page 106
pubs.publication-status Published
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article
pubs.subtype Journal
pubs.elements-id 772842
pubs.org-id Science
pubs.org-id Biological Sciences
dc.identifier.eissn 1616-1599
pubs.record-created-at-source-date 2022-05-16

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