Weather may have caused poor salmon run |

Weather may have caused poor salmon run

GRANTS PASS ” Scientists examining the sudden and widespread collapse of West Coast salmon returns are focusing on unusual changes in weather patterns in 2005.

NOAA Fisheries Service says the salmon returning to rivers to spawn this year found little food when they left their native rivers for the ocean in 2005.

The likely reason was that the jet stream had shifted to the south, delaying the onset of winds that create a condition known as upwelling, which kickstarts the ocean food web by stirring the water from bottom to top.

Returns of fall chinook to the Sacramento, Feather and Yuba rivers in California last year were a third of what biologists expected, and fisheries managers expect sport and commercial fishing will be poor this year.

For the full story, see Tuesday’s edition of The Union.

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