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A tale of shells and claws: The signal crayfish as a threat to the pearl mussel Margaritifera margaritifera in Europe

2019Journal article Open access
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dc.contributor.authorSousa, Ronaldo
dc.contributor.authorNogueira, Joana Garrido
dc.contributor.authorFerreira, André
dc.contributor.authorCarvalho, Francisco
dc.contributor.authorLopes-Lima, Manuel
dc.contributor.authorVarandas, Simone
dc.contributor.authorTeixeira, Amílcar
dc.date.accessioned2018-02-19T10:00:00Z
dc.date.accessioned2019-12-20T17:34:32Z
dc.date.available2018-01-19T10:00:00Z
dc.date.available2019-12-20T17:34:32Z
dc.date.issued2019
dc.description.abstractThe freshwater pearl mussel Margaritifera margaritifera is a highly threatened species in Europe. Several mechanisms may be responsible for the decline in distribution and abundance of European pearl mussel populations, but almost no quantitative data exists about the possible negative impacts of invasive alien species (IAS). In this study, we clearly demonstrate that the invasive signal crayfish Pacifastacus leniusculus predates pearl mussels, using a laboratorial experiment followed by in situ validation in four rivers in the North of Portugal (Mente, Rabaçal, Tuela and Baceiro Rivers; Douro Basin). In the laboratory, the crayfish had a clear preference for small-sized pearl mussels but no differences in predation were found in mesocosms with and without sediment. In addition, we clearly demonstrated that the signal crayfish predates pearl mussels in natural conditions and detected a significant density dependent effect (i.e., sites with more crayfish presented higher number of pearl mussel shells with marks of predation). Given the recent introduction of the signal crayfish and the potential negative impacts on pearl mussel populations we also investigated its autoecology (distribution, abundance, size structure and sex-ratio) in the four studied rivers. Significant differences in average abundance and size of the crayfish were detected between sites and the sex-ratio was highly skewed to females. In view of the widespread distribution of signal crayfish (and other invasive crayfish species) in Europe, future management actions devoted to the conservation of pearl mussels should take in consideration the possible negative effects of these predators, especially on juveniles.
dc.description.sponsorshipThis work was supported by: i) POSEUR (15-2018-03) and ICNF funds under project CP01-MARG-QUERCUS/2018 and ii) European Investment Funds by FEDER/COMPETE/POCI – Operational Competitiveness and Internationalization Program, under Project POCI-01-0145- FEDER-006958 and National Funds by FCT - Portuguese Foundation for Science and Technology, under the project UID/AGR/04033/2013. FCT also support MLL with a doctoral grant (SFRH/BD/115728/2016). We thank the four anonymous reviewers for the suggestions made, which significantly improved the clarity of the manuscript.
dc.description.versioninfo:eu-repo/semantics/publishedVersionen_EN
dc.identifier.citationSousa, Ronaldo; Nogueira, Joana Garrido; Ferreira, André; Carvalho, Francisco; Lopes-Lima, Manuel; Varandas, Simone; Teixeira, Amílcar (2019). A tale of shells and claws: The signal crayfish as a threat to the pearl mussel Margaritifera margaritifera in Europe. Science of the Total Environment. ISSN 0048-9697. 665, p. 329-337en_EN
dc.identifier.doi10.1016/j.scitotenv.2019.02.094en_EN
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/10198/19959
dc.language.isoeng
dc.peerreviewedyesen_EN
dc.relationalterado para: “Combining phylogeny, systematics and ecology to advance the conservation of freshwater mussels Bivalvia: Unionida” Under the surface: combining ecological and evolutionary analysis to conserve freshwater mussels in the Iberian Peninsula
dc.subjectBiological invasionsen_EN
dc.subjectBivalveen_EN
dc.subjectConservationen_EN
dc.subjectMargaritiferidaeen_EN
dc.subjectPacifastacus leniusculusen_EN
dc.subjectPredationen_EN
dc.titleA tale of shells and claws: The signal crayfish as a threat to the pearl mussel Margaritifera margaritifera in Europeen_EN
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitlealterado para: “Combining phylogeny, systematics and ecology to advance the conservation of freshwater mussels Bivalvia: Unionida” Under the surface: combining ecological and evolutionary analysis to conserve freshwater mussels in the Iberian Peninsula
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAGR%2F04033%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POR_NORTE/SFRH%2FBD%2F115728%2F2016/PT
oaire.fundingStream5876
oaire.fundingStreamPOR_NORTE
person.familyNameTeixeira
person.givenNameAmilcar
person.identifier2153193
person.identifier.ciencia-id9510-3CF3-0393
person.identifier.orcid0000-0001-5336-1174
person.identifier.scopus-author-id7202385393
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccessen_EN
rcaap.typearticleen_EN
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relation.isAuthorOfPublication.latestForDiscovery4f0753fd-4b4f-46f6-8e2f-20c7f835a32a
relation.isProjectOfPublication3acb07e1-8183-43b8-8dfc-c0187a8741be
relation.isProjectOfPublication429944c2-5e33-498e-89a5-281bbea1c267
relation.isProjectOfPublication.latestForDiscovery429944c2-5e33-498e-89a5-281bbea1c267

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