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Sequestering and putative biotransformation of paralytic shellfish toxins by the sea scallop ~ Zac
| Content Provider | Semantic Scholar |
|---|---|
| Author | Cembella, Allan D. Shumwayb, Sandra E. Larocque, Richard |
| Copyright Year | 2002 |
| Abstract | The seasonal sequestering and elimination of paralytic shellfish poisoning (PSP) toxins in various tissue compartments of wild stocks of the sea scallop Pl~co~ecten rn~gella~~c~.~ Gmelin were compared for inshore ( < 20 m depth) and offshore (180 m depth) populations from the Gulf of Maine. Individual toxin composition and calculated toxicity in replicate individuals were determined over a 2-yr period by high performance liquid chromatography with fluorescence detection (HPLC-FD). In spite of considerable seasonal variation, the weight-specific net toxicity (pg STX eq . 100 g ’ ) in each tissue compartment usually followed a predictable rank order (digestive gland > mantle + gill > gonad $ adductor muscle), although mantles were briefly more toxic than digestive glands in the fall. Differences in toxin composition between scallop populations were not as significant as the intra-population seasonal variation. However, the profile of residual toxin in different tissues of individual scallops revealed differential toxin accumulation. Relatively high toxin levels were found in the early spring, particularly in digestive gland tissue (> 200 pg STX eq. 100 go ‘). suggesting that substantial toxin may have been sequestered through the winter. An increase in the ~-sulfocarb~oyl:carbamate toxin ratio between early spring and the previous fall provided circumstantial evidence of new toxin accumulation, although this occurred before major blooms of the toxigenic dinoflagellate Alexandrium typically occur in the Gulf of Maine. The toxin profiles in scallop tissues were found to differ substantially from that of a representative PSP toxin-producing dinoflagellate. Akxandrium tumarense (GT429) isolated from the Gulf of Maine. The major PSP toxins found in scallop tissues were low toxicity ~~-sulfocarbanloyl (Cl!C2) derivatives. and highly potent carbamate toxins, including gonyau* Corresponding author. 0022-0981/94/$7.00 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://sandy.heupel.com/pubs/journal_of_experimental_marine_biology_ecology/cembella_et_al_1994.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
