Surfactant-based oil dispersant toxicity to developing nauplii of Artemia: effects on ATPase enzymatic system.
The paper deals with the toxicity of a surfactant-based oil dispersant to the ATPase activities of two naupliar stages of Artemia (instar I & 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.
National Centre for Marine Research, Agios Kosmas, Athens, Greece. ecotou@posidon.ncmr.gr
E
E
Cotou
I
I
Castritsi-Catharios
M
M
Moraitou-Apostolopoulou
D000251:Adenosine Triphosphatases / Q000187:drug effects* / Q000378:metabolism; D000818:Animals; D001156:Artemia / Q000201:enzymology / Q000254:growth & development*; D003902:Detergents / Q000633:toxicity*; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D009930:Organic Chemicals; D013501:Surface-Active Agents / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
D003902:Detergents; D009930:Organic Chemicals; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C048322:finasol OSR-5; D000251:Adenosine Triphosphatases