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Avoidance Response of Rainbow Trout Oncorhynchus mykiss to Hexavalent Chromium Solutions

Avoidance Response of Rainbow Trout Oncorhynchus mykiss to Hexavalent Chromium Solutions Laboratory tests were conducted on one-year-old rainbow trout Oncorhynchus mykiss to evaluate their ability to detect and avoid hexavalent chromium (Cr 6+ ). Test fish were given a choice to discriminate between clean water and Cr 6+ solutions of six sublethal concentrations ranging from 0.0015 to 0.3 mg Cr/L in a counter-current flow, steep gradient chamber. The intensity of avoidance response reached a significant level at test concentrations of 0.003 mg Cr/L and higher, and was directly proportional to the Cr 6+ concentration logarithm. Avoidance threshold was estimated through regression analysis and to be 0.0017 mg Cr/L. This result is approximately sixfold lower than maximum-permitted concentration of 0.01 mg Cr/L accepted as the Lithuanian water-quality guideline for the protection of aquatic life. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of Environmental Contamination and Toxicology Springer Journals

Avoidance Response of Rainbow Trout Oncorhynchus mykiss to Hexavalent Chromium Solutions

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References (26)

Publisher
Springer Journals
Copyright
Copyright © 2007 by Springer Science+Business Media, LLC
Subject
Environment; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution; Waste Management/Waste Technology ; Soil Science & Conservation ; Forestry; Terrestrial Pollution; Environment, general
ISSN
0007-4861
eISSN
1432-0800
DOI
10.1007/s00128-007-9236-1
pmid
17639312
Publisher site
See Article on Publisher Site

Abstract

Laboratory tests were conducted on one-year-old rainbow trout Oncorhynchus mykiss to evaluate their ability to detect and avoid hexavalent chromium (Cr 6+ ). Test fish were given a choice to discriminate between clean water and Cr 6+ solutions of six sublethal concentrations ranging from 0.0015 to 0.3 mg Cr/L in a counter-current flow, steep gradient chamber. The intensity of avoidance response reached a significant level at test concentrations of 0.003 mg Cr/L and higher, and was directly proportional to the Cr 6+ concentration logarithm. Avoidance threshold was estimated through regression analysis and to be 0.0017 mg Cr/L. This result is approximately sixfold lower than maximum-permitted concentration of 0.01 mg Cr/L accepted as the Lithuanian water-quality guideline for the protection of aquatic life.

Journal

Bulletin of Environmental Contamination and ToxicologySpringer Journals

Published: Dec 1, 2007

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