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- W4386536979 abstract "The purple hinged rock scallop, Crassadoma gigantea (Gray 1825), is a species of interest for commercial-scale aquaculture in its native range, along the Pacific coast of North America from Baja California, Mexico to southeastern Alaska. One serious, unresolved issue, however, is the lack of information on uptake, retention, and depuration of algal biotoxins in this species. It is known that rock scallops can retain high levels of paralytic shellfish toxins (PST), including saxitoxin and derivatives, within its tissues including the adductor muscle. Paralytic shellfish toxins can pose serious public health risks, including paralytic shellfish poisoning (PSP), which can be lethal in humans. Diarrhetic shellfish toxins (DST) produced by algal species within the genus Dinophysis spp. is another suite of marine biotoxins monitored by public health agencies, known to cause diarrhetic shellfish poisoning (DSP) in humans. This is the first study to investigate dynamics of Dinophysis spp., and DST in the rock scallop. The present study examined uptake, retention, and depuration of two common toxic algal species and associated biotoxins in Puget Sound, WA: Alexandrium catenella (PST) and Dinophysis spp. (DST), through multiyear field exposures and controlled laboratory studies. Assessment of PST in rock scallop tissues by receptor binding assay from field and laboratory studies revealed very high and persistent levels of PST in visceral tissue and also PST in adductor muscle tissue beyond the FDA limit (80 µg STX equivalents 100 g–1 shellfish tissue) for safe shellfish consumption. An estimate of total depuration time of PST in rock scallop viscera was inconclusive, indicating potentially long depuration times for this species. Toxicity levels varied among individuals of the same cohort, size class, collection time, and location for both visceral and adductor muscle tissues. Laboratory results showed PST levels beyond the FDA limit within adductor muscle tissue during a 6-wk depuration period, indicating a shucked, adductor-only product for this species will require careful testing and management to ensure rock scallops are safe for consumption. More research is needed to decouple the complex interactions of Dinophysis spp., DST, water quality, and rock scallop physiology to inform shellfish managers and public health agencies reliably." @default.
- W4386536979 created "2023-09-09" @default.
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- W4386536979 date "2023-09-08" @default.
- W4386536979 modified "2023-10-16" @default.
- W4386536979 title "Biotoxin Uptake, Retention, and Depuration Trends in Purple-Hinged Rock Scallops, Crassadoma gigantea (Gray 1825)" @default.
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- W4386536979 doi "https://doi.org/10.2983/035.042.0209" @default.
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