Production of Domoic Acid by Pseudo-nitzschia multiseries Hasle, Affected by Lithium |
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Authors: | D V Subba Rao Y Pan † K Mukhida |
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Institution: | Department of Fisheries and Oceans, Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth, Nova Scotia, B2Y 4A2, Canada;Department of Biology, Dalhousie University, Halifax, Nova Scotia, B3H 4JI, Canada |
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Abstract: | Abstract. Upon enrichment with lithium 385.6 μM Li, culture of Pseudo-nitzschia multiseries H asle 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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Keywords: | Anthropogenic activities lithium blooms domoic acid Pseudo-nitzschia multiseries |
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