Short Communication

Identification of the marine diatom Pseudo-nitzschia multiseries (Bacillariophyceae) as a source of the toxin domoic acid in Algoa Bay, South Africa

  • GC Pitcher
  • AD Cembella
  • B Krock
  • BM Macey
  • L Mansfield
  • TA Probyn

Abstract

A unialgal culture of a Pseudo-nitzschia species dominant in the plankton of Algoa Bay in the spring of 2012 was established by isolation of clonal chains of cells. Identification of the species as Pseudo-nitzschia multiseries was based on frustule morphometrics provided by light and scanning electron microscopy, and confirmed by phylogenetic analysis of the LSU rDNA gene. Cultures were shown to produce domoic acid (DA) as measured by ELISA and LC/MS-MS methods, and levels of cellular DA were ~0.1 pg cell–1. Although it is recognised as a cosmopolitan species, these observations provide the first account of this toxic diatom in the coastal waters of South Africa.

Keywords: ELISA, LC/MS-MS, phylogeny

African Journal of Marine Science 2014, 36(4): 523–528

Author Biographies

GC Pitcher
Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, Cape Town, South Africa; Department of Biological Sciences, University of Cape Town, Cape Town, South Africa
AD Cembella
Alfred-Wegener Institut-Helmholtz Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany
B Krock
Alfred-Wegener Institut-Helmholtz Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany
BM Macey
Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, Cape Town, South Africa
L Mansfield
Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, Cape Town, South Africa
TA Probyn
Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, Cape Town, South Africa
Published
2015-04-02
Section
Articles

Journal Identifiers


eISSN: 1814-2338
print ISSN: 1814-232X