The toxicities of a polyunsaturated fatty acid and a microcystin to Daphnia magna

M. Reinikainen*, J. Meriluoto, L. Spoof, K. I. Harada

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

36 Citations (Scopus)

Abstract

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 γ-linolenic acid and the cyanobacterial peptide toxin microcystin-LR to Daphnia. The PUFA was acutely toxic at a concentration of 9 μg ml-1. The effect of microcystin-LR was not statistically significant at the concentration used (3 μg 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.

Original languageEnglish
Pages (from-to)444-448
Number of pages5
JournalEnvironmental Toxicology
Volume16
Issue number5
DOIs
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

Keywords

  • Daphnia
  • Fatty acid
  • Harmful
  • Lipid
  • Microcystin
  • Phytoplankton
  • PUFA
  • Toxic
  • Zooplankton

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