TITLE

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

AUTHOR(S)
LEBLAD, BENLAHCEN RIJAL; LUNDHOLM, NINA; GOUX, DIDIER; VERON, BENOÎT; SAGOU, REGIA; TALEB, HAMID; NHHALA, HASSAN; ER-RAIOUI, HASSAN
PUB. DATE
January 2013
SOURCE
Acta Botanica Croatica;2013, Vol. 72 Issue 1, p35
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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 μg DA g-1 of the whole tissue recorded in sweet clam during spring. Using transmission electron microscopy, thirteen Pseudo-n itzschia species were identified, eight of which are known as producers of domoic acid: P multistriaia, P. cuspidata, P gala.xiae, P inultiseries, P. pseudodelicatissima, P pungens var aveirensis, P. calliantha and P. frauduienta. The five nontoxic species observed were P. subpacijlca, P arenvsensis, P dolorosa, P. subfraudulenta, and P cf caciantha.
ACCESSION #
88014493

 

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