Fish Hatcheries Savior or Scourge for Salmon?. How Hatcheries Work.
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Fish Hatcheries Savior or Scourge for Salmon? FREEING THE ELWA
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Transcript of Fish Hatcheries Savior or Scourge for Salmon?. How Hatcheries Work.
FREEING THE ELWA
Fish HatcheriesSavior or Scourge for Salmon?
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How Hatcheries Work
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Fertilizing sperm and eggs
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Raising Fry
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The Larger Life Stages
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Out-planting to the Wild
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Why Don’t Hatchery Fish Survive Very Well?
O Non-competitive behaviorO Non-native stocks
Feeding Time
Non-native Eastern Brook Trout are often released into
Washington rivers
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Danger of Hatcheries
O Non-native stocksO Swamping and CompetitionO Disease Transmission
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The ArgumentsOSome argue that hatcheries have saved salmon
from going extinct.OSome argue the over-use of hatcheries have
caused wild salmon stocks to decline faster.OSome argue hatcheries have uses that should be
on a case-by-case basis, such as in saving critically endangered runs.
FREEING THE ELWA
This project was made possible in part by a grant from
Washington’s National Park Fund.
