Lecture+10-13-08+The+Last+Salmon

Lecture+10-13-08+The+Last+Salmon - The Last Salmon Life...

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The Last Salmon Life history of the Pacific salmon and impacts of humans Matt Kondolf
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PACIFIC SALMON: M ajor species Chinook or “king” salmon ( Oncorhynchus tshawytscha ) in California, spring, fall, and winter runs Sockeye or red salmon ( O. nerka ) Coho salmon ( O. kisutch ) Pink salmon ( O. gorbusca ) (not in Calif) Chum or “dog” salmon ( O. keta ) (not in Calif) Rainbow trout (O. Mykiss) = steelhead trout Other species in Asia, eg Cherry Salmon
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Chinook or king salmon ( Oncorhynchus tshawytscha ) - largest salmon, typically 20 lbs or more, 1 m long - spawn in wide range of rivers-streams - can spend up to 5 yr at sea - spring, fall, winter runs in Calif, esp. Sacramento R - pre-1850 annual runs 2-3 million, mostly spring-run
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Sockeye or red salmon ( O. nerka ) - typically 6 lbs, spawn in lakes and lake-fed rivers - 1-4 yr at sea - if landlocked, “kokanee”
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Coho salmon (O. kisutch) - typically 10 lbs, spawn in streams < 3% slope - spend 1.5-2 yr at sea, usually in coastal waters - Calif coastal coho listed
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Pink salmon ( O. gorbusca ) “humpback” - typically 2-6 lbs - mass-spawn in coastal (often tidal) streams - only one winter at sea, “zoom salmon”
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This document was uploaded on 07/22/2009.

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Lecture+10-13-08+The+Last+Salmon - The Last Salmon Life...

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