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Effects of toxic dinoflagellates on the feeding and mortality of Artemia franciscana larvae
Demaret, A.; Sohet, K.; Houvenaghel, G. (1995). Effects of toxic dinoflagellates on the feeding and mortality of Artemia franciscana larvae, in: Lassus, P. et al. (Ed.) (1995). Harmful marine algal blooms: Proceedings of the Sixth International Conference on toxic marine phytoplankton = Proliférations d'algues marines nuisibles: Sixiéme Conférence Internationale sur le phytoplancton toxique, October 18-22, 1993, Nantes, France. pp. 427-432
In: Lassus, P. et al. (Ed.) (1995). Harmful marine algal blooms: Proceedings of the Sixth International Conference on toxic marine phytoplankton = Proliférations d'algues marines nuisibles: Sixiéme Conférence Internationale sur le phytoplancton toxique, October 18-22, 1993, Nantes, France. Technique et Documentation - Lavoisier/Intercept: Paris. ISBN 2-85206-972-5. XXIII, 878 pp., more

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Keywords
    Algal blooms; Biological poisons; Metabolism; Toxicity tests; Alexandrium tamarense (Lebour) Balech, 1995 [WoRMS]; Artemia franciscana Kellog, 1906 [WoRMS]; Crustacea [WoRMS]; Prorocentrum micans Ehrenberg, 1834 [WoRMS]; Marine

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  • Demaret, A.
  • Sohet, K.
  • Houvenaghel, G., more

Abstract
    We have tested the toxicity of DSP and PSP toxins producing algae on Artemia franciscana larvae by the use of the ARTOX standardized test procedure. The toxic effects of P. lima and A. tamarense cells and culture solutions have been tested and compared. P. micans and S. trochoidea have been used as control and induced no mortality of Artemia larvae at any age. P. lima is more toxic than A. tamarense and has a rapid lethal effect following a massive ingestion and partial digestion of cells by both Artemia nauplii and metanauplii. A. tamarense lethal effect is dependant on cell suspension densities and on Artemia larvae age. Those results are probably linked to the fact that A. tamarense ingestion rate is low (40% less super(14)C labelled algal material incorporated from A. tamarense than from P. lima) and even stopped after one hour (no cells in the digestive tract). The transfer of DSP toxins from P. lima to Artemia larvae has been demonstrated and the rapid lethal effect observed (50% mortality after 4 hours) shows that DSP producers are potentially highly toxic to zooplankton and are worth further studying. Artemia bioassay tests are promising in the frame of DSP and PSP toxicity rapid detection.

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