title: Identification of pectenotoxins in plankton, filter feeders, and isolated cells of a Dinophysis acuminata with an atypical toxin profile, from Chile.
abstract: A bloom of Dinophysis acuminata produced, in autumn of 2005, a closure of the scallop harvesting in Bahía Inglesa, in the Chilean III region. Isolated cells of this Dinophysis species were shown to contain 180 pg cell(-1) of pectenotoxin 2 but neither okadaic acid nor any of its analogs or derivatives (at least at a detectable level). Examination of plankton and filter-feeder samples covering an area of ca. 350 km, from the location where the toxicity was recorded to Bahía Tongoy, showed that the unique toxin profile found in the first bloom was widespread over that part of Chile and persisted for months. The analysis were carried out by HPLC-ESI-MS using positive ionization mode, with a detection limit below 2 ng of OA mL(-1) of methanolic extract. This is the first report of the presence of pectenotoxins in the plankton of the Pacific coast of America and in the studied filter feeders. This is also the first report of a Dinophysis species containing pectenotoxins and not any toxin of the okadaic acid group.
authors.affiliation: Centro de Investigacións Mariñas, Pedras de Corón s/n, apdo 13, 36620 Vilanova de Arousa, Spain. jblanco@cimacoron.org
authors.forename: Juan
authors.initials: J
authors.lastname: Blanco
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Alvarez
authors.forename: Eduardo
authors.initials: E
authors.lastname: Uribe
mesh_terms: D000818:Animals; D002677:Chile; D002851:Chromatography, High Pressure Liquid; D004141:Dinoflagellida / Q000737:chemistry*; D004784:Environmental Monitoring / Q000706:statistics & numerical data*; D005663:Furans / Q000032:analysis* / Q000737:chemistry; D007448:Invertebrates / Q000737:chemistry*; D018942:Macrolides; D008387:Marine Toxins / Q000032:analysis* / Q000737:chemistry; D013058:Mass Spectrometry; D015394:Molecular Structure; D010839:Phytoplankton / Q000737:chemistry*; D011714:Pyrans / Q000032:analysis* / Q000737:chemistry; D000095702:Polyether Toxins
chemical_list: D005663:Furans; D018942:Macrolides; D008387:Marine Toxins; D011714:Pyrans; C098380:pectenotoxin 2; D000095702:Polyether Toxins