A quick DFG check on Oregon regs shows that the legal limit for sturgeon is 5 per year providing they meet the length requirements.
Again here is the link for them:
http://www.dfw.state.or.us/fish/docs/2012_Statewide_Fish_Regs.pdf
And again your wrong for washington:
Here is the link:
http://wdfw.wa.gov/publications/01185/wdfw01185.pdf
WHITE STURGEON
See the Special Rules for Columbia River,
Snake River, and Tributaries.
Min. size 38" fork length. Max. size 54" fork length. Daily limit 1. Possession limit - 2 daily limits.
Annual limit 5 STURGEON statewide per license year (April 1-March 31). Unless specifically noted
in special rules open only during open game fish or SALMON seasons.
The catch and release only applies to these particular rivers (columbia, snake and tributaries?) which is catch and release. Green sturgeon is a no no. White sturgeon in any other area is fine to take home. If it wasn't it would not have a daily bag/yearly possession limit. You have to now record all your sturgeon catches on a catch card that you must send in after you catch them. If they are tagged its catch and release after you record their identifying information.
Again, I dont know if you've just heard this but per the regs you are wrong my friend. I suggest you read up on your rules and regulations because you obviously aren't.
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Mastatheimposta - 10L2 SB Merlin