Toxins of the dino ̄agellate Alexandrium minutum Halim from the coastal waters and aquaculture ponds in southern Taiwan
- D. F. Hwang, Y. H. Tsai, H. J. Liao, K. Matsuoka, T. Noguchi, S. S. Jeng
- Fish. Sci
Purple clams (Hiatula rostrata Lighttoot) accumulated paralytic shell®sh poisoning (PSP) toxins produced by a toxic strain of the dino ̄agellate Alexandrium minutum Halim for subsequent study of toxin distribution during depuration (detoxi®cation by a nontoxic microalgal diet or starvation). The results con®rm the data in the literature concerning the high toxicity of the digestive gland, and the depuration ef®ciency between feed with nontoxic microalgae and starvation is similar. The toxin pro®le of the purple clams was similar with that of Alexandrium minutum at the end of the exposure period; GTX4 and GTX1 were dominant. However, at the end of the depuration period, GTX3 and GTX2 were dominant. The non-visceral tissues were toxic after feeding with toxic algae. The toxicity was low and the pro®le were also similar with that of the toxic algae. No PSP toxins other than GTX-1, 2, 3 and 4 were detected in the experimental period. q 2001 Elsevier Science Ltd. All rights reserved.