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Copepods induce paralytic shellfish toxin production in marine dinoflagellates. | LitMetric

Copepods induce paralytic shellfish toxin production in marine dinoflagellates.

Proc Biol Sci

Department of Marine Ecology, Göteborg University, Tjärnö Marine Biological Laboratory, SE 452 96 Strömstad, Sweden.

Published: July 2006

AI Article Synopsis

Article Abstract

Among the thousands of unicellular phytoplankton species described in the sea, some frequently occurring and bloom-forming marine dinoflagellates are known to produce the potent neurotoxins causing paralytic shellfish poisoning. The natural function of these toxins is not clear, although they have been hypothesized to act as a chemical defence towards grazers. Here, we show that waterborne cues from the copepod Acartia tonsa induce paralytic shellfish toxin (PST) production in the harmful algal bloom-forming dinoflagellate Alexandrium minutum. Induced A. minutum contained up to 2.5 times more toxins than controls and was more resistant to further copepod grazing. Ingestion of non-toxic alternative prey was not affected by the presence of induced A. minutum. The ability of A. minutum to sense and respond to the presence of grazers by increased PST production and increased resistance to grazing may facilitate the formation of harmful algal blooms in the sea.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1634929PMC
http://dx.doi.org/10.1098/rspb.2006.3502DOI Listing

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