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Related Experiment Video

Updated: Mar 23, 2026

Quantifying Fish Swimming Behavior in Response to Acute Exposure of Aqueous Copper Using Computer Assisted Video and Digital Image Analysis
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Sub-Lethal Effects of Copper on Salmonids: An Avoidance Evaluation Using a Direct Test Method.

Eric L Van Genderen1, Diana L Dishman2, W Ray Arnold3

  • 1International Zinc Association, Durham, NC, 27713, USA.

Bulletin of Environmental Contamination and Toxicology
|March 31, 2016
PubMed
Summary
This summary is machine-generated.

Rainbow trout avoid copper (Cu) at concentrations of 9.8 µg/L and above. The biotic ligand model criterion offers better protection for trout than the hardness-based criterion for copper.

Keywords:
Avoidance behaviorCopperOncorhynchus mykissWater quality criteria

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Area of Science:

  • Environmental Toxicology
  • Aquatic Ecology
  • Ecotoxicology

Background:

  • Copper (Cu) is a common aquatic contaminant.
  • Assessing toxicological thresholds is crucial for environmental protection.
  • Rainbow trout (Oncorhynchus mykiss) are a sensitive indicator species.

Purpose of the Study:

  • To determine the avoidance threshold of rainbow trout to dissolved copper.
  • To compare the effectiveness of different water quality criteria for copper protection.

Main Methods:

  • A Y-maze exposure system was used to observe rainbow trout behavior.
  • Fish were exposed to five concentrations of dissolved copper over a 1-hour period.
  • Digital camcorders recorded avoidance behavior, analyzed for statistical significance.

Main Results:

  • Significant avoidance behavior was observed at copper concentrations ≥9.8 µg/L.
  • No significant avoidance was detected at 1.2 µg/L.
  • Estimated EC50 values for avoidance ranged from 4.81 to 9.15 µg/L.

Conclusions:

  • The biotic ligand model (BLM)-based chronic criterion (2.26 µg/L) provides greater protection for rainbow trout avoidance behavior than the U.S. Environmental Protection Agency (USEPA) water hardness-based criterion (8.03 µg/L).
  • Enforcement of the BLM-based criterion is recommended for better protection of sensitive aquatic species.