Smell no evil: Copper disrupts the alarm chemical response in a diadromous fish, Galaxias maculatus

Thomas, O, Barbee, N, Hassell, K and Swearer, S 2016, 'Smell no evil: Copper disrupts the alarm chemical response in a diadromous fish, Galaxias maculatus', Environmental Toxicology and Chemistry, vol. 35, no. 9, pp. 2209-2214.


Document type: Journal Article
Collection: Journal Articles

Title Smell no evil: Copper disrupts the alarm chemical response in a diadromous fish, Galaxias maculatus
Author(s) Thomas, O
Barbee, N
Hassell, K
Swearer, S
Year 2016
Journal name Environmental Toxicology and Chemistry
Volume number 35
Issue number 9
Start page 2209
End page 2214
Total pages 6
Publisher John Wiley & Sons
Abstract Fish, at all life stages, utilize olfactory information in the decision-making processes essential to survival. Olfaction is a sensitive sensory process, and toxicants within urban aquatic environments can have destructive or depreciating effects. In the present study, the authors exposed Galaxias maculatus, a native fish commonly found in urban waterways throughout southeastern Australia, to 1 of 5 ecologically relevant copper (II) chloride concentrations (<1 μg/L, 1 μg/L, 6 μg/L, 8 μg/L, 18 μg/L) for 16 h. After exposure, the authors tested the response of individual fish to 1 of 3 stimuli: a conspecific skin extract containing a stress-inducing alarm chemical odor, a conspecific odor, and distilled water as a control. Stress responses were quantified through behavioral assays. The authors found evidence for distinct changes in behavioral response with increasing copper concentration and a marked difference in response between control fish and fish exposed to the alarm chemical odor. Copper, even at relatively low concentrations, can have a significant effect on the stress response behavior shown by G. maculatus.
Subject Animal Physiology - Systems
Keyword(s) Olfaction
Ecotoxicology
Metal
Fish behavior
Galaxiid
Copper
DOI - identifier 10.1002/etc.3371
Copyright notice © 2016 SETAC
ISSN 0730-7268
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