Differences in neurobehavioral responses of chinook salmon (Oncorhynchus tshawytscha) and rainbow trout (Oncorhynchus mykiss) exposed to copper and cobalt: Behavioral avoidance

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · Environmental Toxicology and Chemistry

DOI:https://doi.org/10.1897/1551-5028(1999)018<1972:DINROC>2.3.CO;2· OSTI ID:20006628

Hansen, J A; Marr, J C.A.; Lipton, J; Cacela, D; Bergman, H L

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 {micro}g Cu/L, 24 {micro}g Co/L, and the mixture of 1.0 {micro}g Cu/L and 0.9 {micro}g Co/L, whereas rainbow trout avoided at least 1.6 {micro}g Cu/L, 180 {micro}g Co/L, and the mixture of 2.6 {micro}g Cu/L and 2.4 {micro}g Co/L. Chinook salmon were also more sensitive to the toxic effects of Cu in that they failed to avoid {ge}44 {micro}g Cu/L, whereas rainbow trout failed to avoid {ge}180 {micro}g Cu/L. Furthermore, following acclimation to 2 {micro}g Cu/L, rainbow trout avoided 4 {micro}g 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.

• Research Organization: Stratus Consulting, Boulder, CO (US)
• OSTI ID: 20006628
• Journal Information: Environmental Toxicology and Chemistry, Journal Name: Environmental Toxicology and Chemistry Journal Issue: 9 Vol. 18; ISSN ETOCDK; ISSN 0730-7268
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
BEHAVIOR
BIOLOGICAL INDICATORS
COBALT
COPPER
GENETIC VARIABILITY
NERVOUS SYSTEM
SALMON
TROUT
WATER POLLUTION