Sensitivity of early-life stage golden trout to low pH and elevated aluminum

Environmental Toxicology and Chemistry
By: , and 

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Abstract

Early-life-stage golden trout (Oncorhynchus aguabonita aguabonita) were exposed to acid and Al to examine the response and determine the sensitivity of a western, alpine salmonid to conditions simulating an episodic pH depression. Freshly fertilized eggs, alevins, and swim-up larvae were exposed for 7 d to one of 12 combinations of pH and Al, and surviving fish were held to 40 d post-hatch to determine the effect of exposure on subsequent survival and recovery. Golden trout are sensitive to conditions simulating episodic acidification events typically observed in the field. Significant mortality occurred when the pH of test waters was below 5.0 in the absence of Al or when pH was 5.5 in the presence of 100 μg/L total Al. Behavioral impairments were sensitive indicators of low pH and Al stress. Impaired locomotory and feeding behavior occurred at pH 5.5 without Al and at Al concentrations > 50 μg/L. In contrast, growth, RNA-to-DNA ratio, and whole-body ion concentration were relatively less sensitive indicators of sublethal acid and Al stress.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Sensitivity of early-life stage golden trout to low pH and elevated aluminum
Series title Environmental Toxicology and Chemistry
DOI 10.1002/etc.5620120711
Volume 12
Issue 7
Year Published 1993
Language English
Publisher Society of Environmental Toxicology and Chemistry
Contributing office(s) Columbia Environmental Research Center
Description 9 p.
First page 1223
Last page 1232
Country Canada, Norway, Sweden, United States