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Reburial time and indirect mortality of Spisula solida clams caused by dredging

2002Journal article Restricted
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dc.contributor.authorChícharo, Luís
dc.contributor.authorChicharo, Maria Alexandra Teodosio
dc.contributor.authorGaspar, M.
dc.contributor.authorRegala, J.
dc.contributor.authorAlves, Filipe
dc.date.accessioned2013-02-21T15:06:51Z
dc.date.available2013-02-21T15:06:51Z
dc.date.issued2002
dc.date.updated2013-02-19T16:18:34Z
dc.description.abstractClam-dredging results in the exposure of Spisula solida individuals not caught by the dredge. Subsequent survival depends on clam damage, reburial time, and the time needed by predators to reach the impacted area.We analyse these variables and discuss the importance of predation on exposed S. solida caused by dredge fishing. Sampling was performed in July 2000 off the southern coast of Portugal, at Vilamoura, a traditional S. solida sandy fishing ground.We compared the time needed for S. solida individuals to rebury themselves, relative to the abundance of potential predators. Bivalves collected by divers were placed on the seabed, and the times required for reburial were measured. These were compared with the times needed for reburial of the clams exposed by dredge impact. At each of three dredge tracks, we analysed the number of predators that entered three equal quadrats (0.0250 m2) per minute. These results were compared with a non-affected control area. Impact caused by the fishing dredge significantly increases the number of exposed S. solida clams ðp < 0:05Þ and the abundance of potential predatory species ðp < 0:05Þ. The brittle star Ophiura texturata was the most abundant and first species to reach the dredge track (less than 3 min after dredge impact). Other species reaching the dredge track were Pomatochistus spp. (6 min after impact), Diogenes pugilator, and Nassarius reticulatus (both 9 min after impact). Although predators reached the impacted area while S. solida bivalves were still exposed, our results suggest that predation on the non-buried clams in the dredge track is not a major factor for subsequent indirect mortality of S. solida.por
dc.identifier.citationChicharo, L. M. Z.; Chicharo, M. A.; Gaspar, M.; Regala, J.; Alves, F. Reburial time and indirect mortality of Spisula solida clams caused by dredging, Fisheries Research, 59, 1-2, 247-257, 2002.por
dc.identifier.issn0165-7836
dc.identifier.otherAUT: MCH00377;
dc.identifier.urihttp://hdl.handle.net/10400.1/2391
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.subjectIndirect mortalitypor
dc.subjectFishing impactpor
dc.subjectReburial timepor
dc.subjectSpisula solidapor
dc.subjectDisturbancepor
dc.subjectMacrofaunapor
dc.titleReburial time and indirect mortality of Spisula solida clams caused by dredgingpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage257por
oaire.citation.issue1-2por
oaire.citation.startPage247por
oaire.citation.titleFisheries Researchpor
oaire.citation.volume59por
person.familyNameChicharo
person.familyNameTeodosio
person.familyNameAlves
person.givenNameLuis
person.givenNameMaria
person.givenNameFilipe
person.identifier1069549
person.identifier.ciencia-id6716-EE1C-B995
person.identifier.ciencia-idAF10-647B-65FB
person.identifier.ciencia-id1F1F-08D6-E54D
person.identifier.orcid0000-0002-4933-2300
person.identifier.orcid0000-0002-0939-9885
person.identifier.orcid0000-0003-3752-2745
person.identifier.ridB-5077-2013
person.identifier.scopus-author-id6602881426
person.identifier.scopus-author-id56196396700
person.identifier.scopus-author-id15748099500
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationd3ff8510-3be1-4a6a-abdd-eb671a819aef
relation.isAuthorOfPublicationb39b2d6d-d6f5-4130-a9b9-4e7624d44676
relation.isAuthorOfPublication9e5e82fc-b9b0-44d4-84d1-b101810a1985
relation.isAuthorOfPublication.latestForDiscovery9e5e82fc-b9b0-44d4-84d1-b101810a1985

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