Researcher: Fish numbers triple after oil spill fishing closures, Press Register, November 07, 2010 (Emphasis added):
Roy Crabtree, who supervises Gulf fisheries for the National Marine Fisheries Service... said, there are many variables that might explain the increased fish numbers seen off Alabama and Mississippi. Chief among them, he said, is the possibility that some fish were displaced by oil.
“... I can’t comment on what effect it may have had on fish stocks because we don’t have any numbers yet,” said Crabtree. “There could be several reasons there are more fish in the areas they are sampling.” ...
Ken Heck, also of the Dauphin Island Sea Lab... said there were still concerns that some losses might not become visible for a year or more. ...
Michael Carron... agreed that any problems would be revealed during the next several years.
“The research to track this stuff is really import. It’s probably going to be three or four years before we know anything for sure,” Carron said.
Read the report here.