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Acta Botanica Croatica

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Pseudo-nitzschia Peragallo (Bacillariophyceae) diversity and domoic acid accumulation in tuberculate cockles and sweet clams in M’diq Bay, Morocco

Benlahcen Rijat Leblad
  • Corresponding author
  • Laboratoire de Phytoplancton, Institut National de Recherche Halieutique, 90000 Tanger, Morocco
  • Faculté des Sciences et Techniques, Université Abdelmalek Essadi, Tanger, Morocco
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Nina Lundholm / Didier Goux / Benoît Veron / Regia Sagou / Hamid Taleb / Hassan Nhhala
  • Laboratoire de Phytoplancton, Institut National de Recherche Halieutique, 90000 Tanger, Morocco
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Hassan Er-Raioui
Published Online: 2013-04-13 | DOI: https://doi.org/10.2478/v10184-012-0004-x


The diversity of Pseudo-nitzschia (Bacillariophyceae) and accumulation of the neurotoxin domoic acid (DA) in two types of shellfish; tuberculate cockles (Acanthocardia tuberculata) and sweet clams (Challista chione) was explored in M’diq Bay,Morocco during 2007. The highest abundances of Pseudo-nitzschia were found during the period from March to October, with peaks occurring in May and September. Toxin analysis showed an accumulation of domoic acid in shellfish sampled during spring and autumn. The maximum toxin concentration was 4.9 mg DAg-1 of the whole tissue recorded in sweet clam during spring. Using transmission electron microscopy, thirteen Pseudo-nitzschia species were identified, eight of which are known as producers of domoic acid: P. multistriata, P. cuspidata, P. galaxiae, P. multiseries, P. pseudodelicatissima, P. pungens var. aveirensis, P. calliantha and P. fraudulenta. The five non- toxic species observed were P. subpacifica, P. arenysensis, P. dolorosa, P. subfraudulenta, and P. cf. caciantha

Keywords: Diatoms; domoic acid; phytoplankton; Pseudo-nitzschia; shellfish; Morocco

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About the article

Published Online: 2013-04-13

Published in Print: 2013-04-01

Citation Information: Acta Botanica Croatica, Volume 72, Issue 1, Pages 35–47, ISSN (Print) 0365-0588, DOI: https://doi.org/10.2478/v10184-012-0004-x.

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