Occurrence and seasonal variations of algal toxins in water, phytoplankton and shellfish from North Stradbroke Island, Queensland, Australia

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Title Occurrence and seasonal variations of algal toxins in water, phytoplankton and shellfish from North Stradbroke Island, Queensland, Australia
Author Takahashi, Eri; Yu, Jimmy; Eaglesham, Geoff; Connell, Des; McBroom, James; Costanzo, Simon; Shaw, Glendon Reginald
Journal Name Marine Environmental Research
Year Published 2007
Place of publication Oxford
Publisher Elsevier Science Ltd
Abstract A number of marine microalgae are known to produce toxins that can accumulate in shellfish and when eaten, lead to toxic and potentially fatal reactions in humans. This paper reports on the occurrence and seasonal variations of algal toxins in the waters, phytoplankton and shellfish of Southeast Queensland, Australia. These algal toxins include okadaic acid (OA), domoic acid (DA), gymnodimine (GD), pectenotoxin-2 (PTX-2) and pectenotoxin-2-seco acid (PTX-2-SA), which were detected in the sampled shellfish and phytoplankton, via HPLC-MS/MS. Dissolved OA, PTX-2 and GD were also detected in the samples collected from the water column. This was the first occasion that DA and GD have been reported in shellfish, phytoplankton and the water column in Queensland waters. Phytoplankton tows contained both the toxic Dinophysis and Pseudo-nitzschia algae species, and are suspected of being the most likely producers of the OA, PTX-2s and DA found in shellfish of this area. The number of cells, however, did not correlate with the amount of toxins present in either shellfish or phytoplankton. This indicates that toxin production by algae varies with time and the species present and that number of cells alone cannot be used as an indicator for the presence of toxins. The presence of OA and PTX-2s were more frequently seen in the summer, while DA and GD were detected throughout the year and without any obvious seasonal patterns.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.elsevier.com/wps/find/journaldescription.cws_home/405865/description#description
Alternative URI http://dx.doi.org/10.1016/j.marenvres.2007.03.005
Copyright Statement Copyright 2007 Elsevier. Please refer to the journal's website for access to the definitive, published version.
Volume 64
Page from 429
Page to 442
ISSN 0141-1136
Date Accessioned 2007-10-23
Date Available 2009-09-01T06:01:01Z
Language en_AU
Research Centre Atmospheric Environment Research Centre
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Phycology
URI http://hdl.handle.net/10072/16046
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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