Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cycle

17 páginas, 12 figuras, 1 tabla

Detalhes bibliográficos
Autores: Pizarro, Gemita, Escalera-Moura, Laura, González-Gil, Sonsoles, Franco, José Mariano, Reguera Ramírez, Beatriz
Formato: artículo
Fecha de publicación:2008
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/55304
Acesso em linha:http://hdl.handle.net/10261/55304
Access Level:acceso abierto
Palavra-chave:Dinophysis spp.
Cell cycle
Cell toxin quota
DSP toxins
Okadaic acid
Diol-esters
Pectenotoxins
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repository_id_str
spelling Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cyclePizarro, GemitaEscalera-Moura, LauraGonzález-Gil, SonsolesFranco, José MarianoReguera Ramírez, BeatrizDinophysis spp.Cell cycleCell toxin quotaDSP toxinsOkadaic acidDiol-estersPectenotoxins17 páginas, 12 figuras, 1 tablaIn 2005, a bloom of the Diarrhoetic Shellfish Poisoning (DSP) causative agent Dinophysis acuta Ehrenberg in the Galician Rías Baixas (NW Spain) started in early August and reached maximum densities (up to 2 × 104 cell l–1) in mid November. A cell cycle study was carried out over a 22 h period on 9 and 10 November to describe the physiological status and the short-term variability in cell toxin quota of D. acuta at the time of the annual maximum of lipophilic toxins in shellfish. At that time, the population of D. acuta showed an extremely low division rate (μ = 0.03 d–1), a high frequency of dead cells (up to 15%) and cells with starch granules (up to 93%), and no evidence of recent mixotrophic behaviour. Still, the cells, which did not perform vertical migration, aggregated around salinity-driven density discontinuities in the top 5 m and had a high cell toxin quota (determined by liquid chromatography-mass spectrometry) for this species. A 3.5-fold difference was found between maximum (during the night) and minimum values of cell toxin quota. Okadaic acid (OA) was the predominant toxin and changes in cell quota of different toxins showed different daily patterns in the content of okadaiates and pectenotoxins; thus, the toxin profile is influenced by the time of sampling. Dissolved toxins (adsorbed by resins in passive samplers from 8 to 14 November) also reached annual maxima and reflected the vertical distribution of D. acuta cells. These results emphasize the need to parameterize physiological conditions and behaviour of Dinophysis populations during different phases of the population growth and hydrodynamic scenariosThis research was supported by projects ‘Dinophysis Galicia’ (CTM2004-0478- CO3-01) and ‘HABIT’ (EU GOCE-CT-2005-003932) to B.R. and project AGL 2005-07924-C04-02 to J.M.F. G.P. was funded by a Chilean pre-doctoral fellowship from the Centro de Estudios del Quaternario Fuego-Patagonia y Antartica (CEQUA) Foundation and the Instituto de Fomento Pesquero (IFOP).Peer reviewedInter Research201220122008info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/55304reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.3354/meps07179info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/553042026-05-22T06:33:51Z
dc.title.none.fl_str_mv Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cycle
title Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cycle
spellingShingle Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cycle
Pizarro, Gemita
Dinophysis spp.
Cell cycle
Cell toxin quota
DSP toxins
Okadaic acid
Diol-esters
Pectenotoxins
title_short Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cycle
title_full Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cycle
title_fullStr Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cycle
title_full_unstemmed Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cycle
title_sort Growth, behaviour and cell toxin quota of Dinophysis acuta during a daily cycle
dc.creator.none.fl_str_mv Pizarro, Gemita
Escalera-Moura, Laura
González-Gil, Sonsoles
Franco, José Mariano
Reguera Ramírez, Beatriz
author Pizarro, Gemita
author_facet Pizarro, Gemita
Escalera-Moura, Laura
González-Gil, Sonsoles
Franco, José Mariano
Reguera Ramírez, Beatriz
author_role author
author2 Escalera-Moura, Laura
González-Gil, Sonsoles
Franco, José Mariano
Reguera Ramírez, Beatriz
author2_role author
author
author
author
dc.subject.none.fl_str_mv Dinophysis spp.
Cell cycle
Cell toxin quota
DSP toxins
Okadaic acid
Diol-esters
Pectenotoxins
topic Dinophysis spp.
Cell cycle
Cell toxin quota
DSP toxins
Okadaic acid
Diol-esters
Pectenotoxins
description 17 páginas, 12 figuras, 1 tabla
publishDate 2008
dc.date.none.fl_str_mv 2008
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/55304
url http://hdl.handle.net/10261/55304
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.3354/meps07179
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Inter Research
publisher.none.fl_str_mv Inter Research
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812455

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