Abstract
Continuous exposure to 30% treated refinery effluent had severe effects on growth of rainbow trout during 44 days; their size at the end of the experiment was not significantly greater than at the beginning. Effluent at 10% concentration also resulted in a significant reduction in specific growth rate compared to the control and lower concentrations. There was no significant decrease in growth at 3.1% effluent, and the threshold for sublethal effect on growth was judged to be in the vicinity of 6% concentration. The samples of effluent had average chemical characteristics close to the limits in Canadian regulations, or below them. Of 27 samples used, 26 passed the government test for non-lethality to trout at full strength.
Published Version
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