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dc.contributor.authorCalero, B. (Belén) 
dc.contributor.otherRamil, F. (Francisco)
dc.contributor.otherRamos, A. (Ana)
dc.date.accessioned2015-10-01T12:13:44Z
dc.date.issued2015-10-01
dc.identifier.urihttp://hdl.handle.net/10508/9796
dc.description.abstractEchinoderms are one of the main benthic invertebrate groups, especially in deep waters. Particularly, ophiuroids constitute a common component of megabenthic communities, widely distributed worldwide, from intertidal zone to hadal depths. Within this group, dense aggregations of different species, mostly belonging to suspension-feeder families such as Ophiothrichidae, Ophiactidae, Amphiuridae, Ophiocomidae and Ophiacanthidae, were described worldwide, both in shallow and deep waters and over different sea-bottom types. These aggregations were related with their social behavior, but also with favorable environmental conditions and sometimes were described associated with other suspension-feeders like deep-waters corals. During ten Spanish and Norwegian surveys carried out in Northwest Africa between 2002 and 2012 on board of R/V Vizconde de Eza and R/V Dr. Fridtjof Nansen, an intensive sampling program focused on the study of benthic communities was accomplished in the framework of EcoAfrik and FAO EAF-Nansen projects. In this work, we described, for first time in this area, the existence of ophiuroid sea-beds, mainly concentrated along the Saharan and Mauritanian slope The most impressive sea-beds, estimated in more than 3,700,000 individuals of Ophiacantha abyssicola by km2, was recorded off Western Sahara between 410 and 520 m depth on muddy-bottoms. In addition, dense aggregations of Ophiotrix maculata were described for first time for this species at 410 m in the Saharan slope on living Lophelia pertusa, and also between 197-240 m depth on rocky bottom in the seamount off Mauritania. The particular oceanographic conditions in the Saharan-Mauritanian coast linked to the permanence of the upwelling conditions throughout the year, probably enhance the development of suspension-feeders communities and also of these ophiuroids sea-beds.es_ES
dc.language.isoenges_ES
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subjectBiodiversityes_ES
dc.subjectBrittle-starses_ES
dc.subjectsuspension-feederses_ES
dc.subjectaggregationses_ES
dc.subjectFirst recordes_ES
dc.subjectNorthwest Africaes_ES
dc.titleFirst records of dense aggregations of suspension-feeder brittle-stars in Northwest Africa: Could they be directly linked to upwelling phenomena?es_ES
dc.typeconference outputes_ES
dc.identifier.bibliographicCitation14th Deep-Sea Biology Symposium. (31/08/2015 - 04/09/2015. Aveiro (Portugal)). today. conferenceObject. En: , .*
dc.publisher.centreCentro Oceanográfico de Vigoes_ES
dc.relation.projectIDEcoAfrikes_ES
dc.rights.accessRightsopen accesses_ES
dc.coverage.spatialStudyAtlantic Oceanen_US
dc.coverage.spatialStudyCentral Atlanticen_US
dc.coverage.spatialStudyEastern Central Atlanticen_US
dc.coverage.spatialStudySahara watersen_US


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