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dc.contributor.authorEkins, Merrick
dc.contributor.authorErpenbeck, Dirk
dc.contributor.authorWoerheide, Gert
dc.contributor.authorHooper, John NA
dc.date.accessioned2018-07-11T03:05:30Z
dc.date.available2018-07-11T03:05:30Z
dc.date.issued2016
dc.identifier.issn0025-3154
dc.identifier.doi10.1017/S0025315415000831
dc.identifier.urihttp://hdl.handle.net/10072/101338
dc.description.abstractThree species of lithistid sponges, Neoaulaxinia zingiberadix, Isabella mirabilis and Neoschrammeniella fulvodesmus were collected from deep seamounts off New Caledonia to address questions about their population structure, gene flow and the relative contribution of sexual and asexual reproductive strategies to their populations. The sponges were tested by sequencing the ITS (internal transcribed spacer) and CO1 regions of their genomes. These rare and presumably ancient sponges have a distribution restricted to seamounts in the south-western Pacific. Deep seamounts represent geographically separated islands. Although the sponges could be expected to have sexual reproduction restricted to near neighbours due to low sexual dispersal opportunities via larvae, this study found surprisingly high levels of gene flow between the seamounts. Amongst the specimens of N. zingiberadix taken from two seamounts there was no population structure; CO1 resulted in identical genotypes. For the population structure within N. fulvodesmus, as revealed by ITS, most of the variation was within each individual from the six seamounts on which it occurred and CO1 revealed no difference between individuals or seamounts. The third species I. mirabilis showed four genotypes based on CO1, which were distributed across all the seamounts. Indirect measures of different species showed a range of reproductive strategies from asexual to sexual, but with much higher connection between seamounts than previously thought. Individual seamounts did not show a separate population structure as one might expect from ‘islands’. The conclusion must be that these sponges have mechanisms to attain greater dispersal than previously thought.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherCambridge University Press
dc.relation.ispartofpagefrom437
dc.relation.ispartofpageto451
dc.relation.ispartofissue2
dc.relation.ispartofjournalJournal of the Marine Biological Association of the United Kingdom
dc.relation.ispartofvolume96
dc.subject.fieldofresearchEcology
dc.subject.fieldofresearchEcology not elsewhere classified
dc.subject.fieldofresearchPlant biology
dc.subject.fieldofresearchZoology
dc.subject.fieldofresearchcode3103
dc.subject.fieldofresearchcode310399
dc.subject.fieldofresearchcode3108
dc.subject.fieldofresearchcode3109
dc.titleStaying well connected - Lithistid sponges on seamounts
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorHooper, John N.
gro.griffith.authorEkins, Merrick


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