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Mytilus edulis as a biomonitor for the potentially toxic dinoflagellates Alexandrium spp., Dinophysis spp. and Gyrodinium aureolum in the Central North Sea
Peperzak, L.; Lawrence, J.F.; Hagel, P. (1995). Mytilus edulis as a biomonitor for the potentially toxic dinoflagellates Alexandrium spp., Dinophysis spp. and Gyrodinium aureolum in the Central North Sea, in: Lassus, P. et al. (Ed.) 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. 809-814
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; Bioaccumulation; Monitoring systems; Alexandrium Halim, 1960 [WoRMS]; Dinophysis Ehrenberg, 1839 [WoRMS]; Gyrodinium aureolum E.M.Hulburt, 1957 [WoRMS]; Mytilus edulis Linnaeus, 1758 [WoRMS]; Marine

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  • Peperzak, L., more
  • Lawrence, J.F.
  • Hagel, P.

Abstract
    In 1991 and 1992 the temporal development of potentially toxic phytoplankton was studied at an offshore mooring station in the North Sea. The water column at this station is thermally stratified from spring to autumn and occasionally Alexandrium cf. tamarense, Dinophysis spp. and Gyrodinium aureolum had been found. Because there is no information on the actual toxicity of these species in this area, mussels (Mytilus edulis) were moored in baskets in the bottom mixed layer in both years. Animals were retrieved at intervals of 2-4 weeks, and analysed for PSP- (Alexandrium spp.) and DSP- (Dinophysis spp.) toxicity, and ichthyotoxic effects (G. aureolum). Discrete samples for chemical and phytoplankton analyses were taken at a comparable time scale. In 1991, shell growth stopped, and condition indices declined when G. aureolum concentrations reached 105 l-1. DSP toxicity was detected at Dinophysis spp. concentrations less than or equal to 102 l-1. Alexandrium spp. were rare, and PSP toxins were not detected. In 1992 no toxic effects were observed. The use of M. edulis as a biomonitor is discussed.

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