2024-03-29T08:50:16Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1706422019-10-04T07:54:27Zcom_10261_123com_10261_8col_10261_502
2018-10-05T09:56:49Z
urn:hdl:10261/170642
Temporal variability of the toxin profile of Ostreopsis cf. ovata along a natural bloom in the NW Mediterranean
Berdalet, Elisa
Vila, Magda
Alechaga, Élida
Moyano, Encarnación
Estrada, Marta
Farràs, Jaume
Viure Feliu, Laia
Hernández-Llamas, Soraya
Abós-Herràndiz, Rafael
17th International Conference on Harmful Algae (ICHA), 9-14 October 2016, Florianópolis, Santa Catarina, Brazil.-- 1 page
Outbreaks of the toxic benthic dinoflagellate Ostreopsis cf. ovata are recurrent in the summer-fall season in Sant Andreu de Llavaneres beach (40 km North of Barcelona), NW Mediterranean. These blooms have been related to massive macrofauna mortalities and respiratory symptoms and general malaise in people exposed to marine aerosols.
We characterized the toxinology profile of the epiphytic O. cf. ovata population blooming in the summer of 2015 using ultra-high performance reversed phase liquid chromatography coupled to electrospray-high resolution mass spectrometry (UHPLC-HRMS) optimized protocols. Overall, total toxin cellular content was below 30 pg·cell-1 along the bloom, although it exceptionally peaked at the transition from the exponential to the stationary phase (up to 300 - 700 pg·cell-1). On average, ovatoxin a (OVTX-a) accounted for the 75% of the total toxin content, followed by OVTX-b (22%) while OVTXs c to g and isobaric palytoxin (PLTX) were minor components. PLTX, up to 2.5 pg·cell-1 (corresponding to < 0.5% of the total content), was only present coinciding with maximum O. cf. ovata cell abundances (ca. 7-10·105 cells·g-1 of macroalgae fresh weight).
These results are contributing to shed light on the direct implication of these biotoxins in the observed symptoms in humans and the ecosystem, and to ascertain the potential risk of seafood intoxication in the area
2018-10-05T09:56:49Z
2018-10-05T09:56:49Z
2016-10-10
2018-10-05T09:56:50Z
comunicación de congreso
ICHA : The 17th International Conference on Harmful Algae : Abstract Book: 72 (2016)
http://hdl.handle.net/10261/170642
eng
http://icha2016.com/program/#collapseOne
Sí
closedAccess