News tagged with hatchery fish
Growing risks from hatchery fish
A newly published collection of more than 20 studies by leading university scientists and government fishery researchers in Alaska, British Columbia, Washington, Oregon, California, Russia and Japan provides ...
May 14, 2012 |
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Hatchery fish mask the decline of wild salmon populations
Scientists have found that only about ten percent of the fall-run Chinook salmon spawning in California's Mokelumne River are naturally produced wild salmon. A massive influx of hatchery-raised fish that return to spawn in ...
Feb 08, 2012 |
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Evolution at warp speed: Hatcheries change salmon genetics after a single generation
The impact of hatcheries on salmon is so profound that in just one generation traits are selected that allow fish to survive and prosper in the hatchery environment, at the cost of their ability to thrive ...
Dec 19, 2011 |
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Wild rainbow trout critical to health of steelhead populations
Genetic research is showing that healthy steelhead runs in Pacific Northwest streams can depend heavily on the productivity of their stay-at-home counterparts, rainbow trout.
Jan 31, 2011 |
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Scientists worry North Pacific salmon may run out of food
With the number of salmon in the North Pacific having doubled in the past 50 years, scientists are increasingly concerned there may not be enough food to support them, and changing ocean conditions could make it even worse.
Nov 28, 2010 |
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Averting the perfect storm for wild salmon
We hear so much about missing wild salmon and recently a record run. But Simon Fraser University scientists say a population explosion of hatchery and wild salmon in the North Pacific Ocean is leading hatchery fish to beat ...
Oct 04, 2010 |
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Hatchery fish may hurt efforts to sustain wild salmon runs
Steelhead trout that are originally bred in hatcheries are so genetically impaired that, even if they survive and reproduce in the wild, their offspring will also be significantly less successful at reproducing, according ...
Jun 10, 2009 |
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