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Study: Specific salmon key diet to Northwest's endangered orcas


Chinook salmon are key to Northwest orcas all year, study says
The researchers said the whales sometimes eat other species, including halibut, lingcod and steelhead, but they depend most on Chinook.
Author: GENE JOHNSON Associated Press
Published: 7:22 AM PST March 4, 2021
Updated: 7:22 AM PST March 4, 2021
SEATTLE For more than a decade, Brad Hanson and other researchers have tailed the Pacific Northwest s endangered killer whales in a hard-sided inflatable boat, leaning over the edge with a standard pool skimmer to collect clues to their diet: bits of orca poop floating on the water, or fish scales sparkling just below the surface.
Their work established years ago that the whales depend heavily on depleted runs of Chinook, the largest and fattiest of Pacific salmon species, when they forage in the summer in the inland waters between Washington state and British Columbia. ....

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Study: Chinook salmon are key to Northwest orcas all year


Study: Chinook salmon are key to Northwest orcas all year
Gene Johnson
SEATTLE  For more than a decade, Brad Hanson and other researchers have tailed the Pacific Northwest s endangered killer whales in a hard-sided inflatable boat, leaning over the edge with a standard pool skimmer to collect clues to their diet: bits of orca poop floating on the water, or fish scales sparkling just below the surface.
Their work established years ago that the whales depend heavily on depleted runs of Chinook, the largest and fattiest of Pacific salmon species, when they forage in the summer in the inland waters between Washington state and British Columbia. ....

United States , Columbia River , United Kingdom , Detroit Dam , Brad Hanson , Lynne Barre , National Marine Fisheries Service Protected Resource Division , Fisheries Northwest Science Center , Pacific Fisheries Management Council , Pacific Northwest , Northwest Fisheries Science Center , Pacific Coast , Sacramento River , Taku River , North America , Columbia River Chinook , National Marine Fisheries Service , Protected Resource , Salish Sea , Fraser River , ஒன்றுபட்டது மாநிலங்களில் , கொலம்பியா நதி , ஒன்றுபட்டது கிஂக்டம் , டெட்ராய்ட் அணை , பிராட் ஹான்சன் , லின் பாரே ,