Journal
TOXICON
Volume 49, Issue 5, Pages 693-698Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.toxicon.2006.11.010
Keywords
cyanobacteria; anatoxin-a; Cyprinus carpio; lethal effect; toxin uptake
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The worldwide increase of eutrophication in fresh water bodies has caused cyanobacterial blooms to be more frequent. Anatoxin-a is a potent neurotoxin known to be produced by several genera of cyanobacteria including Anabaena. In this work, we exposed juvenile carps to freeze-dried cells of a toxic strain of the cyanobacterium Anabaena sp. during a 4-day period. Two different cell density-10(5) and 10(7) cell ml(-1) -were assayed. Lethality and anatoxin-a concentration in the whole fish were determined. In the higher cell density, all fish died between 26 and 29 h after exposure to toxin, whereas in the 10(5) cell ml(-1) density no deaths were observed. Levels of anatoxin-a in the whole fish ranged between 0.031 mu g g(-1) d.w. at the 105 cell ml(-1) concentration and 0.768 mu g g(-1) d.w. at 107 cell ml(-1) . Minor uptake of anatoxin-a occurred. (c) 2006 Elsevier Ltd. All rights reserved.
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