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Experimental evidence for trait utility of gill raker number in adaptive radiation of a north temperate fish

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cris.virtualsource.author-orcidb70b94ea-8b45-4749-9841-0e3250c0b482
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cris.virtualsource.author-orcidd719c9f7-6f8b-4991-b3f3-923de041a6c9
dc.contributor.authorRösch, Christian
dc.contributor.authorLundsgaard-Hansen, Bänz
dc.contributor.authorVonlanthen, P
dc.contributor.authorTaverna, A.
dc.contributor.authorSeehausen, Ole
dc.date.accessioned2024-10-15T05:38:20Z
dc.date.available2024-10-15T05:38:20Z
dc.date.issued2013
dc.description.abstractNorth temperate fish in post-glacial lakes are textbook examples for rapid parallel adaptive radiation into multiple trophic specialists within individual lakes. Speciation repeatedly proceeded along the benthic – limnetic habitat axis, and benthic – limnetic sister species diverge in the number of gill rakers. Yet, the utility of different numbers of gill rakers for consuming benthic vs. limnetic food has only very rarely been experimentally demonstrated. We bred and raised families of a benthic – limnetic species pair of whitefish under common garden conditions to test whether these species (i) show heritable differentiation in feeding efficiency on zooplankton, and (ii) whether varia- tion in feeding efficiency is predicted by variation in gill raker numbers. We used zooplankton of three different size classes to investigate prey size dependency of divergence in feeding efficiency and to investigate the effect strength of variation in the number of gill rakers. Our results show strong interspecific differences in feeding efficiency. These differences are largest when fish were tested with the smallest zooplankton. Importantly, feeding efficiency is significantly positively correlated with the number of gill rakers when using small zooplankton, also when species identity is statistically controlled for. Our results support the hypothesis that a larger number of gill rakers are of adaptive significance for feeding on zooplankton and pro- vide one of the first experimental demonstrations of trait utility of gill raker number when fish feed on zooplankton. These results are consistent with the suggested importance of divergent selection driven feeding adaptation during adaptive radiation of fish in post-glacial lakes.
dc.description.numberOfPages10
dc.description.sponsorshipInstitut für Ökologie und Evolution (IEE)
dc.description.sponsorshipInstitut für Ökologie und Evolution, Aquatische Ökologie
dc.identifier.doi10.7892/boris.45002
dc.identifier.publisherDOI10.1111/jeb.12166
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/117003
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofJournal of Evolutionary Biology
dc.relation.issn1010-061X
dc.relation.organizationDCD5A442C150E17DE0405C82790C4DE2
dc.relation.organizationDCD5A442C44BE17DE0405C82790C4DE2
dc.subject.ddc500 - Science::570 - Life sciences; biology
dc.titleExperimental evidence for trait utility of gill raker number in adaptive radiation of a north temperate fish
dc.typearticle
dspace.entity.typePublication
dspace.file.typetext
oaire.citation.endPage1587
oaire.citation.issue7
oaire.citation.startPage1578
oaire.citation.volume26
oairecerif.author.affiliationInstitut für Ökologie und Evolution (IEE)
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oairecerif.author.affiliationInstitut für Ökologie und Evolution, Aquatische Ökologie
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unibe.eprints.legacyId45002
unibe.journal.abbrevTitleJ EVOLUTION BIOL
unibe.refereedTRUE
unibe.subtype.articlejournal

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