Abstract
Abstract A study of the effect of lime-neutralized iron hydroxide suspensions on eggs and alevins of brook trout (Salvelinus fontinalis) and coho salmon (Oncorhynchus kisutch) was conducted with a modified proportional diluter. Effects were interpreted from data on hatchability, survival, and growth in five test concentrations and control. Growth of 90-day-old coho salmon alevins was reduced in water containing 1.27 mg Fe/liter of lime-neutralized suspended iron, whereas hatchability was unaffected in the highest concentration tested, 10.5 mg Fe/liter, However, 10.5 mg Fe/liter water had no measurable effect on hatchability, survival, and growth of brook trout alevins. The safe upper limit of lime-neutralized suspended iron for hatchability, survival, and growth of coho salmon alevins may lie between 0.97 and 1.27 mg Fe/liter.
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