Lower number of crabs in Lake P?

Ran across this article and wanted the opinion of the OB.

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The Lake Pontchartrain crab fishery saw a down year in 2012, and it's setting up to be even worse this year, according to John Lopez, coastal sustainability program director of the Lake Pontchartrain Basin Foundation

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There are a number of culprits that could be to blame, but one of the prime suspects, Lopez said, is 2010's BP oil spill

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Another possible cause of the decline, Lopez said, could be lingering effects from Hurricane Isaac.

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In my opinion, this is a pile of BS. Why don't they pin anything on commercial overfishing of them? We went to Delacroix 2 weekends ago and there was a small bay we went in and it must have had at least 200 traps.
I'm 33 and I can remember it being relatively easy to catch a hamper of crabs in the lake and other places growing up with a handul of nets. Yea, BP and storms may have some effect on the population, I think they are totally missing the boat by not placing any blame on the commercials.

Why not place a commercial quota on them like they do other species?

LINK