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August 17, 2009
Vanished Fraser sockeye salmon run seen as disaster, mystery
VANCOUVER – The Fraser River is experiencing one of the biggest salmon disasters in recent history with more than nine million sockeye vanishing from predicted returns.
Aboriginal fish racks are empty, commercial boats worth millions of dollars are tied to the docks and sport anglers are being told to release any sockeye they catch while fishing for still healthy runs of chinook.
Between 10.6 million and 13 million sockeye were expected to return to the Fraser this summer.
But the official count is now just 1.7 million, according to the Department of Fisheries and Oceans.
Where the nine to 11 million missing fish went remains a mystery.
Ernie Crey, fisheries adviser to the Sto:lo tribes living on the Fraser says the latest number go beyond a crisis.
“What it means is that a lot of impoverished natives are going to be without salmon,” he said. “We have families with little or no income that were depending on these fish. It’s a catastrophe.”
Crey said a Canada-U.S. salmon summit should be called to find solutions.
The sockeye collapse is startling because until just a few weeks ago it seemed the Fraser was headed for a good return.
In 2005, nearly nine million sockeye spawned in the Fraser system, producing a record number of young, known as smolts, which migrated out to lakes two years later.
Fisheries and Oceans biologists were buoyed by the numbers – the Chilko and Quesnel tributaries alone produced 130 million smolts – and because the young fish were bigger than any on record.
Those fish were expected to return to the Fraser this summer in large numbers, and those projections held until a few weeks ago when test fishing results began to signal a problem.
Fisheries area director Barry Rosenberger said test nets at sea got consistently low catches, then samples in the river confirmed the worst: the sockeye just weren’t there in any numbers.
There had been some hope the fish, which return in five distinct groups, or runs, might be delayed at sea, but Rosenberger dismissed that.
“There are people hanging on to hope,” he said. “But the reality is ... all indications are that none of these runs are late.”
Rosenberger said officials don’t know where or why the salmon vanished but they apparently died at some point during migration.
“We’ve been pondering this and I think a lot of people are focusing on the immediate period of entry into the Strait of Georgia and asking what on earth could have happened to them,” said Brian Riddell, president of the Pacific Salmon Foundation.
“What we’re seeing now is very, very unexpected.”
Some are pointing fingers at salmon farms as a possible suspect because of research that showed smolts became infested with sea lice as they swam north from the Fraser, through the Strait of Georgia.
“This has got to be one of the worst returns we’ve ever seen on the Fraser,” said ecologist Craig Orr of Watershed Watch. “It’s shocking really.”
Riddell said sea lice infestations are a possible factor, but it is “extremely unlikely” that could account for the entire collapse.
“We have had the farms there for many years and we have not seen it related to the rates of survival on Fraser sockeye (before),” he said.
However, Riddell said a sockeye smolt with sea lice might weaken and become easy prey or succumb to environmental conditions.
Alexandra Morton, who several years ago correctly predicted a collapse of pink salmon runs in the Broughton Archipelago because of sea lice infestations, in March warned the same thing could happen to Fraser sockeye.
Other big runs of salmon are expected to return this year – notably pinks, which are projected to number 17 million.
(Globe and Mail)
© 2009 The Canadian Press
