3 Storage and Detoxification of Bivalve Molluscs as a Tool in a Marketing Strategy
33
Fig. 3.4 (a) Mussels exposed to P. lima toxins through different pathways: P. lima culture, lysate,
filtrate alone or with diatom culture added. There was little or no retention of dissolved DSP toxins
in the shellfish meat. (b) PSP toxin concentration in mussel digestive glands after feeding toxic
control treatment with A. minutum cultures (AMIN): Surn 1: supernatant resulting from culture
filtration, together with supernatant of centrifuged pellets, ultrasound treated: Surn 2: supernatant
resulting from culture filtration with Skeletonema costatum cells added: Lysat: A.minutum cellular
debris following ultrasound treatment and supernatant recovery by centrifugation
Safe Storage of Uncontaminated Shellfish
Regarding oysters no significant differences were observed between the ‘Pozzolana’
(biological filters) and control tanks in terms of mortality (less than 5 % over
24 days), total body weight or soft tissue dry weight. Moreover, continuous
monitoring of nitrogen excretion in the re-circulated water system revealed a natural