Fuels for development: evolution of maternal provisioning in asterinid sea stars

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dc.contributor.author Prowse, TA en
dc.contributor.author Sewell, Mary en
dc.contributor.author Byrne, M en
dc.date.accessioned 2015-01-21T03:54:49Z en
dc.date.issued 2008 en
dc.identifier.citation Marine Biology, 2008, 153 (3), pp. 337 - 349 (13) en
dc.identifier.issn 0025-3162 en
dc.identifier.uri http://hdl.handle.net/2292/24202 en
dc.description.abstract For marine invertebrates, larval developmental mode is inseparably linked to the nutritional content of the egg. Within the asterinid family of sea stars there have been multiple, independent, evolutionary transitions to lecithotrophic development from the ancestral, planktotrophic state. To investigate the evolution of maternal investment and development within the Asterinidae, we quantified individual lipid classes and total protein for eggs and larval stages of closely related species representing three developmental modes (planktotrophy, planktonic lecithotrophy and benthic lecithotrophy). Within species, maternal provisioning differed between females indicating that egg quality varied with parentage. Maternal investment was related to egg size but, after correcting for egg volume, we identified two major oogenic modifications associated with the evolution of lecithotrophic development: (1) a reduction in protein deposition that probably reflects the reduced structural requirements of nonfeeding larvae, (2) an increase in deposition of a single class of energetic lipid, triglyceride (TG). The exception was Parvulastra exigua, which has benthic, lecithotrophic development and lays eggs with a lipid to protein ratio close to that of planktotrophs. This oogenic strategy may provide P. exigua larvae with a protein “weight-belt” that assists in maintaining a benthic existence. Asterinids with planktotrophic development used a significant portion of egg TG to build a feeding bipinnaria larva. For Meridiastra mortenseni, female-specific differences in egg TG were still evident at the bipinnaria stage indicating that egg quality has flow-on effects for larval fitness. In lecithotrophic asterinids, TG reserves were not depleted in development to the larval stage whereas protein stores may help fuel early larval development. Available data indicate that there may be two evolutionarily stable egg lipid profiles for free-spawning, temperate echinoderms. en
dc.relation.ispartofseries Marine Biology 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.sherpa.ac.uk/romeo/issn/0025-3162/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Fuels for development: evolution of maternal provisioning in asterinid sea stars en
dc.type Journal Article en
dc.identifier.doi 10.1007/s00227-007-0809-7 en
pubs.issue 3 en
pubs.begin-page 337 en
pubs.volume 153 en
pubs.end-page 349 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 77365 en
pubs.org-id Science en
pubs.org-id Biological Sciences en
dc.identifier.eissn 1432-1793 en
pubs.record-created-at-source-date 2010-09-01 en

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