Temperature: A prolonged confounding factor on cholinesterase activity in the tropical reef fish Acanthochromis polyacanthus

Cholinesterase activity usually decreases in fish exposed to anticholinesterase compounds such as organophosphate and carbamate pesticides. Here we show that tropical reef fish Acanthochromis polyacanthus (or spiny damsel) also exhibits a decrease in ChE activity when exposed to elevated temperature...

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Bibliographic Details
Published in:Aquatic toxicology 2013-09, Vol.140-141, p.337-339
Main Authors: Botté, Emmanuelle S., Smith-Keune, Carolyn, Jerry, Dean R.
Format: Article
Language:English
Subjects:
Acanthochromis polyacanthus
Animals
carbamate pesticides
Cholinesterase
Cholinesterases - metabolism
Confounding factor
Coral reef
fish
Muscle, Skeletal - enzymology
Perciformes - physiology
Temperature
Time Factors
Toxicity Tests - standards
toxicology
Tropical Climate
Tropical fish
water temperature
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Summary:Cholinesterase activity usually decreases in fish exposed to anticholinesterase compounds such as organophosphate and carbamate pesticides. Here we show that tropical reef fish Acanthochromis polyacanthus (or spiny damsel) also exhibits a decrease in ChE activity when exposed to elevated temperature from 28°C to 32°C or 34°C after 4 days. We further demonstrate that the decline persists even after 7 days of recovery at control temperature. This is the first report of a drop in ChE activity in fish as temperature increases. Our results strongly suggest the need for long-term monitoring of water temperature in the field prior to sampling A. polyacanthus for toxicology studies, as temperature is a prolonged and confounding factor for ChE activity in this species.
ISSN:0166-445X
1879-1514
DOI:10.1016/j.aquatox.2013.06.021