A great white shark known as “Jamison” is shown in a handout photo. It was among those tagged in a colony of sharks down off Cape Cod who show a tendency over past five years to make journeys into Canadian waters. THE CANADIAN PRESS/HO-Massachusetts Shark Research Program / Atlantic White Shark Conservancy

A great white shark known as “Jamison” is shown in a handout photo. It was among those tagged in a colony of sharks down off Cape Cod who show a tendency over past five years to make journeys into Canadian waters. THE CANADIAN PRESS/HO-Massachusetts Shark Research Program / Atlantic White Shark Conservancy

Off Canada’s East Coast, a hunt to detect ‘beautiful’ great white sharks

So far the team has identified and tagged roughly 20 great whites

The great white sharks move torpedo-like through East Coast waters, cruelly efficient hunters with multiple rows of serrated teeth devouring seals and other prey.

But the “fascinating” creatures are themselves being closely watched by international teams of scientists who are attempting to document their apparent renaissance in the northwest Atlantic.

“We are seeing signs the conservation measures we’re taking are giving the animals a chance and enabling a comeback,” says Frederick Whoriskey, a marine biologist and ecologist at Dalhousie University.

“But we don’t have the numbers (of their abundance) yet.”

At her lab in Halifax’s Bedford Institute of Oceanography, Heather Bowlby, research lead at the federal Canadian Atlantic Shark Research Laboratory, is attempting to remedy that.

She’s preparing an expedition for early August to build on the scant knowledge of these elusive creatures’ lives in Atlantic Canadian waters.

Her three-person team will pull alongside the animals and rapidly attach a tag that records information, a potentially dangerous task given their immense power.

The work is worth the effort, she says.

“As a top predator, if the population can increase it suggests the ecosystem is healthy enough to support them, which is very important.”

The biologist says there’s been “a definite increase in sightings” since fishing rules of the past decade protected animals caught on long lines and in weirs.

Records go back over a century — complete with annotations such as an 1873 entry from a St. Pierre Bank, N.L., fisherman remarking, “teeth in dory.”

However, the federal Fisheries Department’s partnership with American researcher Gregory Skomal, of the Massachusetts division of marine fisheries, and the Atlantic White Shark Conservancy, will provide more reliable information.

Skomal’s group is preparing a population estimate in his area, where there’s evidence of what scientists refer to as a “hot spot” of sharks at various stages of life feasting on abundant seals off Cape Cod.

“It seems to be their first stop on the highway on the drive from Florida to Canada, where you can find a pretty good meal,” Skomal explains in a telephone interview from his office.

His team’s survey tags an animal and then returns to that area to see how many others are spotted or captured, before recapturing one of the original sharks from the prior visits.

“We have to come up with that number for Cape Cod and then we can take a hard look at what proportion of our animals move into Canadian waters,” the American researcher explains.

ALSO READ: Saanich resident helps take a bite out of global shark fin trade

Skomal says so far his team has identified and tagged roughly 20 great whites — out of about 170 tagged in the area — that are prone to northward journeys over the five year study in his zone.

In anticipation of their arrival off Nova Scotia, Bowlby’s team has access to arrays of acoustic stations listening for their “ping” over this summer and fall.

She tagged one great white herself last year off the Nova Scotia coast, nicknamed “North.”

The data gathered on the sharks’ trips, the depths they went to and surrounding water temperatures may give Bowlby data on their preferred habitat.

So far, she’s noting the sharks are appearing to search along the coasts for prey and are in both deep and shallow water, and often near the surface.

Still, one of the questions bothering some experts is why great whites are seldom detected by acoustic arrays near Sable Island, where thousands of seals make their home.

Whoriskey’s “speculation” is the grey seals are forming social units that can fight off one of their deadliest enemies.

Meanwhile, a non-profit group that’s made some great white sharks into household names in Nova Scotia has applied for a permit to conduct a return visit off Cape Breton from Sept. 13 to Oct. 4.

Last fall, teams from the Ocearch research vessel MV Ocearch caught and tagged satellite transmitters of seven great whites off Lunenburg and Halifax.

The animals are given Twitter names such as “Hal” and thousands of people follow them on the organization’s online global shark tracker, effectively becoming cheerleaders for great whites’ apparent comeback.

Bob Hueter, Ocearch’s chief science adviser and a shark biologist at Florida’s Mote Marine Laboratory, says his group’s research is showing the wide range of the great white sharks from southern Florida to the Cabot Strait.

“A good proportion we’ve tagged since 2012 have gone to Atlantic Canada waters and have spent time in Nova Scotia,” he said in a telephone interview.

He says his group’s goal is to have fully tagged 60 sharks of various sizes and ages from Florida to Nova Scotia and to track their movements and habitats.

For Bowlby, the end game is greater knowledge on habitat, feeding habits and even shark nursing grounds — though so far none have been found — leading to better informed policy decisions.

For example, if the sharks are once again consuming seals in large numbers, this data can affect policy decisions on permitting a cull of the massive herds.

In addition, there is the curiosity — even awe — over how one of the ocean’s great animals behave in their lifetimes.

“They’re beautiful, they’re fascinating, they’re graceful, they’re powerful. They’re amazing animals,” the scientist says.

Michael Tutton, The Canadian Press


Like us on Facebook and follow us on Twitter.

Just Posted

An RCMP cruiser. (Patrick Davies photo - 100 Mile Free Press)
Police kept busy following overnight vehicle thefts, B&Es near 100 Mile House

One man is facing charges and three others suspects in relation to the thefts

A new banner was unveiled Monday, June 21, in Williams Lake that will hang across Oliver Street. (Monica Lamb-Yorski photo - Williams Lake Tribune)
Orange Shirt Banner Project unveiled in Williams Lake

The Every Child Matters - 215 banner will hang across the city’s main street

(File Photo)
Police watchdog clears 100 Mile RCMP of wrongdoing after man dies in Williams Lake shelter

The man had been in custody at 100 Mile RCMP detachment prior to being taken to Williams Lake

The future of the Quesnel Rec Centre pool is unknown after residents shot down potential renovations in a referendum. (Melanie Law photo - Quesnel Cariboo Observer)
Cariboo Regional District, Quesnel residents shoot down pool renovations in referendum

The $20 million project needed approval from people living in the North Cariboo Recreation area

FILE – Perry Bellegarde, National Chief of the Assembly of First Nations, takes part in an event on Parliament Hill in Ottawa on Tuesday, July 7, 2020. THE CANADIAN PRESS/Sean Kilpatrick
Indigenous Peoples Day must be a ‘call to action’, says Assembly of First Nations chief

Discovery of children at Kamloops residential school site must lead to change, Perry Bellegarde says

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

Cannabis bought in British Columbia (Ashley Wadhwani/Black Press Media)
Is it time to start thinking about greener ways to package cannabis?

Packaging suppliers are still figuring eco-friendly and affordable packaging options that fit the mandates of Cannabis Regulations

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

Most Read