Healthy juvenile white sturgeon at the Nechako White Sturgeon Recovery Initiative’s hatchery in Vanderhoof. The young sturgeon are being preyed upon by otters in the Nechako watershed. Nechako White Sturgeon Recovery Initiative photo

Northern B.C. city dealing with its own otter problem

Vanderhoof’s Nechako White Sturgeon Recovery Initiative working to increase fish survival rate

With a greedy Vancouver-based otter making provincial headlines as it feasts on expensive fish and evades capture, Vanderhoof has its own otter issues.

Nechako White Sturgeon, a species listed under federal government’s Species At Risk Act (SARA) are being preyed upon by otter in the Nechako watershed.

Unlike in Vancouver, where there’s just one troublesome otter, the SARA-listed sturgeon face a number of the predators, says Wayne Salewski, the chair of the Nechako White Sturgeon Recovery Initiative’s Community Working Group.

“I think we have families of otters who, like all good otters, like fish.”

The sturgeon travel the length and breadth of the Nechako watershed, swimming as far north as Takla Lake and as far west as Stuart Lake, but always returning to a stretch of water downtown Vanderhoof to spawn.

The Nechako White Sturgeon Recovery Initiative in the city runs a hatchery, catching female and male sturgeon, stripping the eggs gently and returning the adult fish to the river, and then hand-fertilizing the eggs to raise juvenile sturgeon. The young sturgeon are later released into the river at nine different sites, some with radio transmitters in them, to allow the Initiative to track the fish and their survival rate.

Salewski says they’ve discovered in the past few years that the juvenile fish are being preyed upon by otter in the river system.

“Over the years we started to recognize that those fish with radio transmitters seemed to get preyed on quite heavily by otters. We’d find that out by finding the radio transmitter up on the shore,” explains Salewski.

“Most interestingly, we find a lot of these transmitters in the latrines of otters. Otters are very social animals, very clean, and they like the same bathroom sites.”

Salewski says the otter don’t ingest the transmitters, but eat around them and spit them out. Volunteers with the Nechako White Sturgeon Recovery Initiative are able to use their radios to find the discarded transmitters, which are reusable, says Salewski. “That’s one good thing about the whole situation.”

The group has now begun to put together a program to discover the impact the otters are making to the survival, and overall recovery, of the at-risk white sturgeon.

Salewski says it’s been a learning curve from the start.

“With every year of experience we are having to make changes in our practices to increase survivial. In the first few years, we would put a fish into the water at two to three inches in length. … We could quickly see things like seagulls swarming our release sites and having a heyday. So that caused us to say, ‘Well, we will raise them bigger and that should look after that.’”

But the larger fish, at 12 to 14 inches, were excellent fodder for osprey and eagles, says Salewski.

“No self-respecting eagle would go after a two-inch fish, but it would easily go after a 12- to 14-inch fish.”

Now, the volunteers at the hatchery have decided to release the fish after two years.

“That is our reaction. … If otters are chasing these [12-inch fish], perhaps if they were bigger and faster, maybe an otter wouldn’t challenge the idea of taking them on. That’s where we are – supersizing our fish and seeing if that gives us a better survival rate.”

Salewski says the current low water levels aren’t helping, as visibility is good for predators.

“It’s the circle of life. We are not naive, but there are many questions that are left behind. Are we in fact making otters healthier because they now have a constant supply of food? And will the healthy mommy produce more healthy babies and our problem will get larger because there are more of them? These are obvious questions and things that need to be answered,” says Salewski.

Find out more about the Nechako White Sturgeon Recovery Initiative here.

READ MORE: Conservation and education collide at sturgeon spawning



newsroom@ominecaexpress.com

Like us on Facebook and follow us on Twitter

Just Posted

10th annual Tofino Saltwater Classic embraces catch and release format for Chinook prizes

Fundraising fishing derby has raised over $500,000 for community initiatives since its inception.

Courtenay-Alberni Greens name Sean Wood as federal candidate

Nomination meeting took place June 15 at Hupacasath Hall in Port Alberni

Musings from surfers about surfboards

“I tried to make it so it was easy to get into waves and not too floaty so you could duck dive it.”

Tla-o-qui-aht board fish farms to obtain video footage of pens

Fish farms were boarded under the authority of the Tla-o-qui-aht Hereditary Chief Ray Seitcher.

Tofino Jazz Festival returns this weekend

“The Festival’s main mission is to provide an opportunity to build community through music.”

Protesters rally in Victoria over newly approved Trans Mountain pipeline

The Still No Consent! No Trans Mountain! 20 kilometre march will end at Island View Beach

Wildfire burning in coastal forest

A fire beside the Sea to Sky Highway is burning up a steep slope

PHOTOS: Event marks one year since soccer team rescued from Thai cave

Nine players and coach took part in marathon and bike event to help improve conditions at cave

Rock climber dies after fall at Stawamus Chief in Squamish

The man had fallen about 30 metres while climbing in the Grand Wall area

Five B.C. students taken to hospital after playing with vaping device

School district said students were taken to hospital ‘out of an abundance of caution’

Being a pot dealer is not what it used to be

Sunday Big Read: the business of selling marijuana in B.C. is a slow bureaucratic slog

VIDEO: Two more pride flags have been stolen from Langley woman

Lisa Ebenal was “angry” and “fed up” after the latest theft. Then people started showing suppport

B.C. couple who has raised 58 children turns to community amid cancer diagnosis

Family who raised, fostered and adopted many kids hoping to gain some precious together time to fight cancer

Canucks acquire forward J.T. Miller from Lightning

J.T. Miller, 26, had 13 goals and 34 assists for the Lightning last season

Most Read