Surfactant-based
oil dispersant toxicity to developing nauplii of Artemia: effects on ATPase
enzymatic system
E. Cotou, I.
Castritsi-Catharios, M. Moraitou-Apostolopoulou-2001 Chemosphere, 42
(8) : 959-964 (from Current
Contents)
Abstract:
The paper deals with the toxicity of a
surfactant-based oil dispersant to the ATPase activities of two naupliar
stages of Artemia (instar I and II). Both instars were exposed to sub-lethal
and lethal concentrations derived from acute toxicity data. The chosen
concentrations were near to LOECs and NOECs. An eightfold difference
indicated between the instars was instar-exposure time dependent. The most
prominent effects were the inhibition and the stimulation of Na+/K+-ATPase
and Mg2+-ATPase activities, respectively. The cause of these effects was
related to the dispersant components, the surfactants. The pattern
stimulation/inhibition of Mg2+-ATPase and Na+/K+-ATPase activities could be
used to indicate toxic stress by surfactant-based oil dispersants since
previous studies with other contaminants have shown different ATPase
activity patterns
(Natl Ctr Marine Res; Agios Kosmas; GR-16604
Ellinikon; Greece, e-mail: tou@posidon.ncmr.gr)