Spawning sockeye salmon are seen making their way up the Adams River in Roderick Haig-Brown Provincial Park near Chase, B.C., on October 13, 2014. Salmon migrating through rivers and streams in British Columbia use all their strength, but new research says even tiny amounts of diluted bitumen weakens their chances of making it back to spawn. THE CANADIAN PRESS/Jonathan Hayward

Spawning sockeye salmon are seen making their way up the Adams River in Roderick Haig-Brown Provincial Park near Chase, B.C., on October 13, 2014. Salmon migrating through rivers and streams in British Columbia use all their strength, but new research says even tiny amounts of diluted bitumen weakens their chances of making it back to spawn. THE CANADIAN PRESS/Jonathan Hayward

Bitumen spill would harm B.C. salmon: study

Exposure to diluted bitumen hinders the swimming performance of salmon, causes their heart muscle to stiffen and damages their kidneys

Salmon migrating through rivers and streams in British Columbia use all their strength, but new research says even tiny amounts of diluted bitumen weakens their chances of making it back to spawn.

Exposure to diluted bitumen hinders the swimming performance of salmon, causes their heart muscle to stiffen and damages their kidneys, Sarah Alderman, a post-doctorate researcher at the University of Guelph, said in an interview.

“We’re seeing changes from molecules up to what the organ actually looks like. All of this is affecting how they can actually swim.”

Bitumen has the consistency of crumbling asphalt and doesn’t flow freely like oil. It needs to be diluted with another petroleum product for it to flow through pipelines.

It is the main crude product flowing through Kinder Morgan’s Trans Mountain pipeline from Alberta to B.C. The capacity of the pipeline is slated to triple to 900,000 barrels a day.

No one was available from Trans Mountain for an interview. The company said in a statement that it is not familiar with the University of Guelph research, but it is committed to ensuring pipeline safety.

“Trans Mountain shares the value Canadians place on our waterways and our important salmon populations,” said the statement.

“Pipeline safety is our number one priority and, through the experience gained in 65 years of operations, Trans Mountain has developed a mature suite of programs to prevent pipeline failures and maximize the safety of the pipeline system.”

Alderman said their research and work from Simon Fraser University, based in Burnaby, B.C., and the University of British Columbia are the first studies on the impact of bitumen on salmon migration.

“It really is an area that hasn’t had much attention,” she said. “Our knowledge of bitumen toxicity is really limited.”

Alderman said a bitumen spill is more difficult to control than an oil spill because bitumen sinks, while oil can be corralled with booms and skimmed from the surface.

The research involved exposing year-old salmon, the typical age of migration from freshwater to the sea, to low levels of bitumen. The salmon exposed to diluted bitumen were found to be less fit, with a 15-per-cent reduction in swimming capacity and signs of cardiac fibrosis. she said.

Blood tests indicated muscle and kidney damage, raising concerns about the ability of the salmon to recover from their migration, Alderman said.

“All of our (bitumen) exposures are at really low concentrations, parts per billion,” she said. “It doesn’t take much to have a big effect. The highest one we used was about 70 parts per billion of these dissolved compounds, and that’s 20 times less than was measured in the Gulf of Mexico after the BP oil spill.”

An explosion on the Deep Water Horizon oil rig in 2010 caused massive environmental damage along the coastline of the United States. It is considered the largest marine oil spill in the industry’s history.

The researchers plan to test how salmon perform in a simulated migration from fresh to salt water after being exposed to diluted bitumen, Alderman said.

She said the Trans Mountain expansion project and a potential spill is on the minds of the researchers.

The pipeline crosses the Fraser River watershed, Canada’s largest freshwater salmon-bearing area, Alderman said. B.C.’s commercial salmon and sport fishing industries are worth hundreds of millions of dollars and the species has significant cultural and spiritual importance to Indigenous people.

Alderman said they want to know how to be prepared for a possible spill and initial research indicates a quick responses limits the harm to salmon populations.

“That’s the big take home message from our first study,” Alderman said. “If this happens it really matters what life stages are present in the stream and how quickly you can clean it up and how much gets spilled.”

Dirk Meissner, The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

Alexis Paige Simpson has not been in contact with her family in two months. (RCMP photo)
Chilliwack RCMP looking for missing 20-year-old woman

Police say Alexis Paige Simpson has not been in contact with her family in two months

(Maps.Chilliwack.com)
RCMP seek dash-cam footage after Chilliwack road rage incident

Male driving a black pickup stopped and allegedly threatened to punch another driver

Deepak Sharma of Abbotsford has been convicted of the sexual assault of one of his cab passengers in West Vancouver in January 2019.
Former Abbotsford Hindu temple president convicted of sexual assault

Deepak Sharma assaulted a female passenger when he was a cab driver

A blood drive in support of 1-year-old Rielynn Gormley of Agassiz is scheduled for Monday, June 28 at Tzeachten First Nation Community Hall in Chilliwack. Rielynn lives with type 3 von Willebrand disease, which makes it difficult for her to stop bleeding. (Screenshot/Canadian Blood Services)
Upcoming blood drive in honour of Agassiz toddler with rare blood condition

The Gormley family has organized a blood drive in Chilliwack on June 28

Woody’s RV World hosts a grand opening for its brand-new Abbotsford location on Saturday. (YouTube)
Woody’s RV World hosts Abbotsford grand opening on Saturday

First-ever B.C. location for successful RV chain, located on Marshall Road

The border crossing into the United States is seen during the COVID-19 pandemic in Lacolle, Que. on February 12, 2021. THE CANADIAN PRESS/Paul Chiasson
VIDEO: Border quarantine to soon lift for fully vaccinated Canadians

Eligible travellers must still take multiple COVID-19 tests

Chilliwack secondary school’s principal is apologizing after a quote equating graduation with the end of slavery in the U.S. was included in the 2020-2021 yearbook. (Screenshot from submitted SnapChat)
B.C. student’s yearbook quote equates grad to end of slavery; principal cites editing error

Black former student ‘disgusted’ as CSS principal apologizes for what is called an editing error

Skeena MLA Ellis Ross. (Photo by Peter Versteege)
BC Liberal leadership candidate condemns ‘senseless violence’ of Okanagan church fires

Skeena MLA Ellis Ross says reconciliation isn’t about revenge for past tragedies

A coroner’s inquest will be taking place at the Capitol Theatre in Port Alberni for the next week. (ELENA RARDON / ALBERNI VALLEY NEWS)
Teen B.C. mom who died following police custody recalled as ‘friend to many’

Police sent Jocelyn George to hospital after intoxication had gone ‘beyond the realm’ of normal detox

FILE - In this Nov. 29, 2020, file photo, Las Vegas Raiders defensive end Carl Nassib leaves the field after an NFL football game against the Atlanta Falcons in Atlanta. Nassib on Monday, June 21, 2021, became the first active NFL player to come out as gay. Nassib announced the news on Instagram, saying he was not doing it for the attention but because “I just think that representation and visibility are so important.” (AP Photo/John Bazemore, File)
Nassib becomes first active NFL player to come out as gay

More than a dozen NFL players have come out as gay after their careers were over

Penticton Indian Band Chief Greg Gabriel speaks to the Sacred Hearts Catholic Church burning down early Monday morning, June 21, 2021. (Monique Tamminga Western News)
Penticton band chief condemns suspicious burning of 2 Catholic churches

Both Catholic church fires are deemed suspicious, says RCMP

COVID-19 daily cases reported to B.C. public health, seven-day moving average to June 17, 2021. (B.C. Centre for Disease Control)
B.C.’s COVID-19 infections drop to 90 on Sunday, 45 Monday

Pandemic spread dwindles as 77% of adults receive vaccine

By protesting uninvited in First Nations’ territories, conservationists are acting in a neocolonial or paternalistic manner, says Huu-ay-aht Chief Robert Dennis. Photo by Heather Thomson
A closer look: do Vancouver Island First Nations support the war in the woods?

First Nations/environmentalist old growth alliance uneasy, if it exists at all

One Reconciliation Pole and two Welcome Figures were unveiled during a ceremony in honour of truth and reconciliation on National Peoples Indigenous Day at the Vancouver School District in Vancouver, B.C., on Friday, June 21, 2019. THE CANADIAN PRESS/Chad Hipolito
Horgan marks Indigenous Peoples Day by urging recognition of systemic racism

National Indigenous Peoples Day has been marked in Canada since 1996

Most Read