Differences in neurobehavioral responses of chinook salmon (Oncorhynchus tshawytscha) and rainbow trout (Oncorhynchus mykiss) exposed to copper and cobalt: behavioral avoidance
Behavioral avoidance of copper (Cu), cobalt (Co), and a Cu and Co mixture in soft water differed greatly between rainbow trout (Oncorhynchus mykiss) and chinook salmon (O. tshawytscha). Chinook salmon avoided at least 0.7 microgram Cu/L, 24 microgram Co/L, and the mixture of 1.0 microgram Cu/L and 0...
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Published in | Environmental toxicology and chemistry Vol. 18; no. 9; pp. 1972 - 1978 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Hoboken
Wiley Periodicals, Inc
01.09.1999
SETAC |
Subjects | |
Online Access | Get full text |
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Summary: | Behavioral avoidance of copper (Cu), cobalt (Co), and a Cu and Co mixture in soft water differed greatly between rainbow trout (Oncorhynchus mykiss) and chinook salmon (O. tshawytscha). Chinook salmon avoided at least 0.7 microgram Cu/L, 24 microgram Co/L, and the mixture of 1.0 microgram Cu/L and 0.9 microgram Co/L, whereas rainbow trout avoided at least 1.6 microgram Cu/L, 180 microgram Co/L, and the mixture of 2.6 micrograms Cu/L and 2.4 micrograms Co/L. Chinook salmon were also more sensitive to the toxic effects of Cu in that they failed to avoid greater than or equal to 44 microgram Cu/L, whereas rainbow trout failed to avoid greater than or equal to 180 microgram Cu/L. Furthermore, following acclimation to 2 microgram Cu/L, rainbow trout avoided 4 microgram Cu/L and preferred clean water, but chinook salmon failed to avoid any Cu concentrations and did not prefer clean water. The failure to avoid high concentrations of metals by both species suggests that the sensory mechanism responsible for avoidance responses was impaired. Exposure to Cu concentrations that were not avoided could result in lethality from prolonged Cu exposure or in impairment of sensory-dependent behaviors that are essential for survival and reproduction. |
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Bibliography: | istex:36CB234E281E311EAEE300E75D0214B715C9BDCC ArticleID:ETC5620180916 ark:/67375/WNG-VK792C05-T ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0730-7268 1552-8618 |
DOI: | 10.1002/etc.5620180916 |