Alexandrium (Dinophyceae) species in Malaysian waters

Usup, G. and Leaw, C. P. and Asmat, Ahmad and Teen, L. P. (2002) Alexandrium (Dinophyceae) species in Malaysian waters. Harmful Algae, 1. pp. 265-275.

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Abstract

A study was carried out to determine the presence of paralytic shellfish poisoning (PSP) toxin-producing dinoflagellates in the coastalwaters of Peninsula Malaysia. This followed first ever occurrences of PSP in the Straits of Malacca and the northeast coast of the peninsula. The toxic tropical dinoflagellate Pyrodinium bahamense var. compressum was never encountered in any of the plankton samples. On the other hand, five species of Alexandrium were found. They were Alexandrium affine, Alexandrium leei, Alexandrium minutum, Alexandrium tamarense and Alexandrium tamiyavanichii. Not all species were present at all sites. A. tamiyavanichii was present only in the central to southern parts of the Straits of Malacca. A. tamarense was found in the northern part of the straits, while A. minutum was only found in samples from the northeast coast of the peninsula. A. leei and A. affine were found in both the north and south of the straits. Cultured isolates of A. minutum and A. tamiyavanichii were proven toxic by the receptor binding assay for PSP toxins but A. tamarense clones were not toxic. Mean toxin content for the A. tamiyavanichii and A. minutum clones were 26 and 15 fmol per cell STX equivalent, respectively. This study has provided evidence on the presence of PSP toxin-producing Alexandrium species in Malaysian waters which suggests that PSP could increase in importance in the future.

Item Type: Article
Additional Information: Universiti Malaysia Sarawak, (UNIMAS)
Uncontrolled Keywords: Universiti Malaysia Sarawak, UNIMAS, IPTA, education, sarawak, malaysia, kuching, samarahan, universiti, university
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QL Zoology
Divisions: Academic Faculties, Institutes and Centres > Institute of Biodiversity and Environmental Conservation
Depositing User: Karen Kornalius
Date Deposited: 12 Jun 2014 07:30
Last Modified: 20 Mar 2015 05:13
URI: http://ir.unimas.my/id/eprint/3205

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