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Accumulation of domoic acid activity in copepods

From National Research Council Canada

AuthorSearch for: ; Search for: ORCID identifier: https://orcid.org/0000-0002-0158-0081; Search for:
FormatText, Article
ConferenceNinth International Conference, February 7-11, 2000, Hobart, Australia
Abstract
Herbivorous copepods are key intermediates for the transfer of algal toxins into marine food webs. Domoic acid activity was detected by receptor binding assay in copepods fed on the diatom Pseudo-nitzschia multiseries (Hasle) Hasle within 3 h. Results of receptor binding assays indicated a range of 3 to 7 ng domoic acid equivalents per copepod within that period. A lOOO-fold accumulation of domoic acid activity above ambient cellular concentrations of the toxin was documented in Acartia tonsa Dana after 20.5 h of exposure and grazing rates were as high as 1,600 cells copepod-’ hT’ during that time. There was no significant difference in copepod grazing rates on non-toxic Pseudo-nitzschia pungens (Grunow) Hasle and toxic P. multiseries.
Publication date
PublisherUNESCO. Intergovernmental Oceanographic Commission
In
LanguageEnglish
Peer reviewedYes
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Record identifier48cd9f5c-169c-41e9-aa9c-a406a480568d
Record created2024-08-15
Record modified2024-08-15
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