Relationship between occurrence of Dinophysis species (Dinophyceae) and shellfish toxicity

Okadaic acid accumulation in macrofilter feeders subjected to natural blooms of Dinophysis acuminata

“…The abundance of toxic cells and toxin concentrations in animal tissues are sometimes not significantly related (Lassus et al, 1991;Dahl and Johannessen, 2001), as organisms can be found contaminated without the toxic algae being detected (MacKenzie et al, 2004). Toxic cell concentrations can decline while the toxins still remain in the water column (MacKenzie et al, 2004), or the toxin effect may be diluted in the presence of alternative food sources (Dahl and Johannessen, 2001).…”

Diarrhetic shellfish toxicity in relation to the abundance of Dinophysis spp. in the German Bight near Helgoland

“…Similar observations were made in a Norwegian bay: no apparent relation between Dinophysis spp. concentrations and mussel toxicity was observed (Dahl & Johannessen 2001). On the other hand, in a Norwegian fjord DSP-toxin concentrations in blue mussels followed changes in Dinophysis spp.…”

Accumulation of diarrhetic shellfish poisoning toxins in the oysterCrassostrea gigasand the musselChoromytilus meridionalisin the southern Benguela ecosystem

“…Sidari et al 1998, Séchet et al 1990, Dahl et al 1995, Godhe et al 2002, Klöpper et al 2003, Jorgensen and Andersen 2007, others have found this relationship to be inconsistent (e.g. Lassus et al 1991, Jackson and Silke 1995, Dahl and Johannessen 2001, Marcaillou et al 2001. The difficulty of relating toxic cell count with shellfish toxicity is often considered to be a function of the variability in cell toxin content (Marcaillou et al 2005).…”