Dr Yee is a politician working to get the Mayor seat. He's protecting his political base which is Chinese. He's right in the sense that it is a cultural dish that is being banned. If this were a caviar ban, there'd be a riot yet very few caviar sources are sustainable. However, his sole argument that the activity is sustainable is wrong and needs to be shown that. The race card is about the only play proponents can use since data doesn't support their sustainable argument.
He's fought off other bans including frog and turtle. If it's "sustainable," the only other argument is cruelty. And that's subjective and cultural.
Still, Bay area folks should let Yee know that that the data he has is wrong and he should support the ban until populations are rebuilt. That's if he wants to be Mayor. Here is a contact page:
Sen Leland Yee contact page
To support the Assembly Bill, AB 376, write to your district's assembly member and tell them to support the bill. Here's a list of assembly members:
http://www.assembly.ca.gov/acs/acsframeset7text.htm
If you don't know your district, then check on the side frame of that page under "Find my District".
California has a big Chinese population, so this will be significant. Nothing compared to getting an Asian country to do it, but still significant nonetheless.
Also write Senators Boxer and Fienstein and Governor Brown to support the bill:
Senator Fienstein contact
Senator Boxer contact
Governor Brown contact