For one thing we actually get fish from the hatcheries. We take samples of fish before they've released them. After that, you're absolutely right; we are only able to use the adipose fin clip to identify if it as a hatchery fish or not.
Research Scientist, Pacific Region, Department of Fisheries and Oceans
For one thing we actually get fish from the hatcheries. We take samples of fish before they've released them. After that, you're absolutely right; we are only able to use the adipose fin clip to identify if it as a hatchery fish or not.
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