The Fraser River's Sockeye Salmon are in trouble. And when the salmon are in trouble, we're in trouble.
The number of Sockeye returning from the ocean to the Fraser River this year is one of the lowest in the past 50 and follows two years of dangerously low returns. In fact, we have witnessed decades of decline for diverse Sockeye populations from the Fraser Watershed, some of which are almost extinct.
Many salmon runs besides Fraser Sockeye are also endangered, while others have disappeared. As populations decline, so does genetic diversity, which allows salmon to adapt and keeps the populations strong and healthy.
The disappearance of Pacific salmon would be devastating for First Nations and families that depend on the fish for food, for all who consider salmon a healthy and tasty food source and those who rely the salmon fishing business. Salmon are also essential to ecosystems, bringing nutrients from the oceans to the rivers and forests and are a valuable food source for whales, bears, birds and other wildlife.
The Fraser Sockeye fishery is one of Canada's most valuable, accounting for close to 50% of the economic value of all salmon caught in B.C. Their extremely low returns have been called a mystery because finding one simple cause or solution is difficult. However, we do know the major threats, and that gives us hope that we can change things for the better.
Sockeye have been heavily fished over the years, their spawning habitat in rivers and lakes is being destroyed, their survival is threatened by warming oceans and rivers due to climate change, and they are vulnerable to sea lice and diseases from open-net salmon farms.
While we need to invest more funding in science to understand the details behind saving our disappearing salmon, we can and must take precautionary actions to curtail activities that we know harm salmon. Canada's Wild Salmon Policy provides the tools to do this, but although the government adopted this policy in 2005, it has yet to fund it and put it to work.
We need to work with government and industry to find ways to catch salmon from healthy stocks while avoiding catching salmon from threatened populations. Freshwater habitat needs to be conserved and rebuilt, and destructive practices such as converting fish-bearing lakes to mine-tailings ponds or killing streamside vegetation should be stopped.
We must also make sure that seafood labelled as sustainable truly meets criteria. Third-party eco-certification, like that offered by the U.K.-based Marine Stewardship Council, must be reserved for well-managed fisheries that don't further endanger threatened salmon populations.
We need to change salmon farming to remove the impacts of sea lice and disease by creating a thriving closed-containment industry separating farmed fish from wild.
Canada must also combat global warming by committing to major reductions of greenhouse gases at upcoming negotiations in Copenhagen if the salmon are to survive their journey from spawning grounds to the sea and back over the long term.
Fortunately, salmon protection practices are emerging -- fishermen are working with First Nations in the Skeena watershed to use beach seines to selectively harvest abundant salmon runs; commercial-scale trials of closed-containment salmon farms are underway off the east coast of Vancouver Island and at other sites around the world.
We will all be richer if we play our part in protecting our ecosystem.
-- Science Matters is written by David Suzuki and Faisal Moola. Take David Suzuki's nature challenge and learn more at davidsuzuki.org
