CONFIRMATION OF DOMOIC ACID PRODUCTION BY PSEUDONITZSCHIA AUSTRALIS (BACILLARIOPHYCEAE) CULTURES1

Authors


  • 1

    Received 24 March 1992. Accepted 15 June 1992.

  • We thank Monty Graham and Gordon Smith for collecting samples, Dave Hutchinson for loaning us large-volume culture vessels for our experiments, Susan Coale and Mary Silver for some of the samples, and Jon Krupp and Elizabeth Hale for the scanning electron microscopic work that confirmed the species identifications. The primary support for this research was provided by the Institute of Marine Sciences and the Department of Natural Sciences, University of California, Santa Cruz. Dr. Richard Danielson and the California Department of Health Services provided supplies to support the culturing work and some of the field sampling. We thank Greta Fryxell, D. V. Subba Rao, and L. Fritz for constructive comments that improved the manuscript.

Address for reprint requests.

ABSTRACT

Single done isolates of Pseudonitzschia australis Frenguelli (= Nitzschia pseudoseriata Hasle) isolated from a toxic bloom in Monterey Bay, California produced domoic acid in culture. Although long-term historical records do not indicate previous blooms of this species on the Pacific coast, this is probably because it has been often misidentified as Nitzschia seriata Hasle; previous evidence for toxicity is lacking. Hydrographic data suggest that areas such as Monterey Bay might be “hot spots” for domoic acid-producing blooms.

Ancillary