Production of Domoic Acid by Pseudo-nitzschia multiseries Hasle, Affected by Lithium

Authors

  • D. V. Subba Rao,

    Corresponding author
    1. Department of Fisheries and Oceans, Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth, Nova Scotia, B2Y 4A2, Canada
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  • Y. Pan,

    1. Department of Fisheries and Oceans, Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth, Nova Scotia, B2Y 4A2, Canada
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    • †Institute for Marine Biosciences, National Research Council of Canada, 1411 Oxford St. Halifax, N.S., B3H 3ZI, Canada. E-mail: Youlian.Pan@NRC.CA

  • K. Mukhida

    1. Department of Biology, Dalhousie University, Halifax, Nova Scotia, B3H 4JI, Canada
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*Mariculture and Fisheries Division, Kuwait Institute of Scientific Research, P.O. Box 1638, 22017 Salmiya, Kuwait. E-mail: sdurva@kisr.edu.kw

Abstract

Abstract. Upon enrichment with lithium 385.6 μM Li, culture of Pseudo-nitzschia multiseries Hasle produces substantially higher level of the neurotoxin domoic acid DA 230 fg · cell-1 than the control 135 fg · cell-1. We hypothesize that in Cardigan Bay, where the first domoic acid episode was reported, high levels of Li could have originated via a massive freshwater run-off involving an adjacent dump. Lithium enrichment may have played a part in enhancing DA production leading to the intoxication episodes of 1987. Thus, anthropogenic activities may play a role as a sustainer of algal blooms and should be included in habitat management considerations involving coastal and inshore algal blooms, both toxigenic and non-toxigenic.

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