Physiological and biochemical aspects of ozone toxicity to rainbow trout (Salmo gairdneri)
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Abstract
An acute toxicity curve for dissolved ozone (O3) in soft water at 10 °C, using 10–13-cm rainbow trout (Salmo gairdneri) as the test species was calculated. The 96-h LC50 (95%, confidence interval) was 9.3 (8.1–10.6) μg/L. The lethal threshold level was about 8 μg/L mandating that a conservative margin of safety be used if ozone is employed as a fish disease control agent. Death apparently results from massive destruction of the gill lamellar epithelium together with a severe hydromineral imbalance. In partial chronic (3-mo) testing, 2 μg/L caused no significant biological damage while 5 μg/L caused some gill pathological changes and reduced feeding behavior. Accordingly, 2 μg/L is suggested as a provisional maximum safe exposure level, pending completion of life cycle studies. Thus, if ozone-treated water is discharged into the environment, dissolved O3 should be reduced to at least the 2 μg/L level to minimize adverse impacts on salmonids in receiving waters.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Physiological and biochemical aspects of ozone toxicity to rainbow trout (Salmo gairdneri) |
| Series title | Journal of the Fisheries Research Board of Canada |
| DOI | 10.1139/f79-088 |
| Volume | 36 |
| Issue | 6 |
| Year Published | 1979 |
| Language | English |
| Publisher | NRC Research Press |
| Contributing office(s) | Western Fisheries Research Center |
| Description | 10 p. |
| First page | 605 |
| Last page | 614 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |