Predation by the polyclad flatworm Imogine mediterranea on the cultivated mussel Mytilus galloprovincialis in Bizerta Lagoon (northern Tunisia)

2016 ◽  
Vol 48 (4) ◽  
pp. 1608-1617 ◽  
Author(s):  
Mehrez Gammoudi ◽  
Raja Ben Ahmed ◽  
Nawzet Bouriga ◽  
Mossadok Ben-Attia ◽  
Abdel Halim Harrath
Keyword(s):  
Mytilus Galloprovincialis ◽  
Northern Tunisia ◽  
Bizerta Lagoon

Shell disturbances and butyltins burden in commercial bivalves collected from the Bizerta lagoon (northern Tunisia)

2011 ◽  
Vol 184 (11) ◽  
pp. 6869-6876 ◽  
Author(s):  
Ferdaous Jaafar Kefi ◽  
Youssef Lahbib ◽  
Lamia Gargouri Ben Abdallah ◽  
Najoua Trigui El Menif
Keyword(s):  
Northern Tunisia ◽  
Bizerta Lagoon

scholarly journals Tetrodotoxins (TTXs) and Vibrio alginolyticus in Mussels from Central Adriatic Sea (Italy): Are They Closely Related?

Marine Drugs ◽  
2021 ◽  
Vol 19 (6) ◽  
pp. 304
Author(s):  
Simone Bacchiocchi ◽  
Debora Campacci ◽  
Melania Siracusa ◽  
Alessandra Dubbini ◽  
Francesca Leoni ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Mytilus Galloprovincialis ◽  
Polyketide Synthase ◽  
Adriatic Sea ◽  
Tandem Mass ◽  
Hydrophilic Interaction ◽  
Marche Region ◽  
Peptide Synthetase ◽  
Scientific Opinion ◽  
Vibrio Spp

Tetrodotoxins (TTXs), potent neurotoxins, have become an increasing concern in Europe in recent decades, especially because of their presence in mollusks. The European Food Safety Authority published a Scientific Opinion setting a recommended threshold for TTX in mollusks of 44 µg equivalent kg−1 and calling all member states to contribute to an effort to gather data in order to produce a more exhaustive risk assessment. The objective of this work was to assess TTX levels in wild and farmed mussels (Mytilus galloprovincialis) harvested in 2018–2019 along the coastal area of the Marche region in the Central Adriatic Sea (Italy). The presence of Vibrio spp. carrying the non-ribosomal peptide synthetase (NRPS) and polyketide synthase (PKS) genes, which are suspected to be involved in TTX biosynthesis, was also investigated. Out of 158 mussel samples analyzed by hydrophilic interaction liquid chromatography coupled with tandem mass spectrometry (HILIC-MS/MS), 11 (7%) contained the toxins at detectable levels (8–26 µg kg−1) and 3 (2%) contained levels above the EFSA safety threshold (61–76 µg kg−1). Contaminated mussels were all harvested from natural beds in spring or summer. Of the 2019 samples, 70% of them contained V. alginolyticus strains with the NRPS and/or PKS genes. None of the strains containing NRPS and/or PKS genes showed detectable levels of TTXs. TTXs in mussels are not yet a threat in the Marche region nor in Europe, but further investigations are surely needed.

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