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Secondary settlement of cockles Cerastoderma edule as a function of current velocity and substratum: A flume study with benthic juveniles

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDE MONTAUDOUIN, Xavier
IDREF: 075931664
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBACHELET, Guy
dc.contributor.authorSAURIAU, Pierre-Guy
dc.date.accessioned2023-10-09T09:29:57Z
dc.date.available2023-10-09T09:29:57Z
dc.date.issued2003-01-01
dc.identifier.issn0018-8158en_US
dc.identifier.urihttps://www.researchgate.net/publication/226878777_Secondary_settlement_of_cockles_Cerastoderma_edule_as_a_function_of_current_velocity_and_substratum_A_flume_study_with_benthic_juveniles
dc.identifier.urioai:crossref.org:10.1007/978-94-017-2276-6_12
dc.identifier.urioai:researchgate.net:226878777
dc.identifier.urioai:crossref.org:10.1023/b:hydr.0000008493.83270.2d
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/184348
dc.description.abstractEnSome newly-settled bivalve molluscs can experience a second dispersal stage in the water column and colonize areas distant from initial settlement zone ('secondary settlement'). To document mechanisms involved in such a process, experiments were conducted in a recirculating 13-m flume, using juvenile cockles Cerastoderma edule (shell length between 0.8 and 5.7mm). After 4 h and under current surface velocities of 10, 20 and 24cm s–1, all juveniles left the plexiglass substratum (site of initial introduction) and 42.4, 58.6 and 76.2% of juveniles, respectively, were retrieved from a downstream sand area (which only represented 7.7% of the total flume surface). Naked-eye observations showed that smaller individuals were borne within the water column, whereas larger individuals tended to roll or slip on the substratum. Byssus threads produced by the juveniles were often seen, sometimes covered in sand grains. These observations were confirmed by finding larger juveniles in the upstream part of the sand area. When sand was replaced by mud, a reduced proportion of cockles was retrieved in the experimental substratum (18.4, 20.0 and 16.4%, respectively). Observations showed that juveniles rarely succeeded in anchoring themselves in mud. When initially introduced on a favourable substratum (medium sand), more than 87% of juveniles were retrieved from that sand array at all flow velocities. This study shows that secondary settlement occurs for juvenile cockles up to 5.7mm in shell length and depends not only on flow velocity but on substratum type.
dc.language.isoENen_US
dc.sourcecrossref
dc.sourceresearchgate
dc.title.enSecondary settlement of cockles Cerastoderma edule as a function of current velocity and substratum: A flume study with benthic juveniles
dc.typeArticle de revueen_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalHydrobiologiaen_US
bordeaux.page103-116en_US
bordeaux.volume503en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue1-3en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamECOBIOCen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcedissemin
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Hydrobiologia&rft.date=2003-01-01&rft.volume=503&rft.issue=1-3&rft.spage=103-116&rft.epage=103-116&rft.eissn=0018-8158&rft.issn=0018-8158&rft.au=DE%20MONTAUDOUIN,%20Xavier&BACHELET,%20Guy&SAURIAU,%20Pierre-Guy&rft.genre=article


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