期刊
ENVIRONMENTAL TOXICOLOGY
卷 16, 期 5, 页码 444-448出版社
JOHN WILEY & SONS INC
DOI: 10.1002/tox.10003
关键词
Daphnia; PUFA; fatty acid; lipid; microcystin; toxic; harmful; zooplankton; phytoplankton
Polyunsaturated fatty acids (PUFAs) are essential components of zooplankton diets. However, studies with PUFAs from cyanobacteria indicate toxic properties. We investigated the toxicity of the PUFA gamma -linolenic acid and the cyanobacterial peptide toxin microcystin-LR to Daphnia. The PUFA was acutely toxic at a concentration of 9 mug ml(-1). The effect of microcystin-LR was not statistically significant at the concentration used (3 mug ml(-1)), but an additive effect with the PUFA was observed. Relative to LC50-values of well-known pollutants, the PUFA was intermediately toxic. The activity equaled that of microcystin-LR, which is commonly treated as one of the most potent cyanobacterial toxins. Our results suggest that the toxic properties of PUFAs deserve more attention. (C) 2001 John Wiley & Sons, Inc.
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