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It's usually not a problem. A few lice don't hurt a fish.

But for several years, researchers have been finding that salmon farms changed things. The concentration of fish in a small area meant dense sea lice populations as well. And the lice didn't just stick around. If a migrating wild salmon passed through the area, it encountered much denser populations than in the rest of the ocean.

And too many sea lice -- particularly on a three-inch young salmon -- can kill.

(It's not a B.C. problem. European fish farms have faced the same issue.) The industry and government have denied the problem exists. The industry has tended to attack the researchers.

The province has ordered a few farms fallowed during migration periods. But it's pro-industry. The government has had an all-party legislative committee report on aquaculture for eight months now without responding in anyway to the recommendations.

But the evidence of the sea lice problem has been piling up. Last year, when an environmental group laid charges, the Attorney General's Ministry appointed a special prosecutor to decide whether they should go ahead. Bill Smart -- the special prosecutor in the Glen Clark case -- sought independent scientific advice. The fisheries expert, Frederick Whoriskey, concluded salmon farms were creating a sea lice problem that was killing pink salmon in the Broughton Archipelago. A single farm produces more than 50 million sea lice eggs a year, he found.

Smart concluded that sea lice from salmon farms were harming the wild fish. He decided not to go ahead with the prosecution because it wasn't clear that was against the law.

The industry went on the attack; the government ignored the independent prosecutor's report.

This month, a research study published in the journal Science found the sea lice from salmon farms in the area threaten wild pink salmon with extinction. Local pinks could be gone within four years, the researchers reported.

This was a peer-reviewed study; other scientists had to assess its legitimacy before it could be published.

Research can always be disputed. The provincially funded Pacific Salmon Forum says its research shows no connection between fish farms and sea lice on wild salmon.

But the findings published in Science can't sensibly be ignored. Risking the future of wild salmon stocks, given the evidence, would be reckless.

The question is whether the industry and the government will see it that way.

The industry's reaction so far has unfortunately been to deny a problem.

Accepting the risk would open the door to potential solutions. The authors of the Science article note that relocating the fish farms to deeper waters or away from wild salmon migration routes would help.

The provincial government has seemed frozen. It handed the whole problem off to an all-party committee of MLAs, with an NDP majority, which held hearings. Its report was done in May.

Agriculture Minister Pat Bell said the government would have a new aquaculture policy by the fall. But so far, nothing.

The industry provides needed jobs in coastal communities and the farmed salmon fetches about $240 million a year. The economic impact is significant.

But opposition has moved beyond the environmental movement. A coalition of some 100 ecotourism businesses

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And the future of wild salmon is one those issues that goes beyond fishermen and coastal communities.

There are lots of factors in the vanishing salmon, from climate change to development to logging practices.

But sea lice are part of the problem, according to solid research. The government is going to face increasing pressure to deal with the issue.

Footnote: The legislative committee called for governments to help the industry to move to "closed containment" systems instead of mesh pens. But the salmon farmers say practical technology doesn't exist. The committee also offered common-sense measures like removing environmental protection from the agriculture ministry, was is charged with promoting the industry.

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