|
|
The article below was taken from
the Saint John Times Globe, Friday, July 24/98
Magnificent but misunderstood
By GLEN ALLEN Telegraph Journal
staff writer photo by David Nickerson
 Dr.
Stephen Turnbull, who spends his days surrounded by sharks, shed a little light
on an animal many people fear. |
If you're swimming underwater in the Bay of Fundy or
somewhere in sunnier climes and a shark comes right at you, head straight for
the bottom. That's the professional advice of one of
Canada's foremost experts on sharks, Dr. Stephen Turnbull of the University of
New Brunswick's Saint John campus. Dr. Turnbull, who has
swum with the shark here, in the Caribbean and off Hawaii, says "they don't
attack from above. If they're in a feeding mode they'll come from behind or
above." Sharks have been in the news in this province
recently with the sighting of one off Mispec Beach in Saint John and another
rare Porbeagle shark trapped in a weir off Grand Manan Island and Dr. Turnbull
has been pursued by the media to explain the habits of what is probably the
world's least-understood creature. In an office cluttered
with shark jaws and many posters of about 400 varieties of the world's sharks,
Dr. Turnbull says, "In fact we don't really know exactly how many species there
are. We don't know how long they live and we don't know what their territory
is. That's how little is known about them. It's only in the past 20 years that
people have been doing hard-core research." What is known
is that more sharks than people might believe make the cold waters of the Bay
of Fundy their home. There is not only the relatively common dogfish (a small
shark) but the king of all sharks, the Great White, the Thresher shark, Blue
shark, Mako shark and the Tiger shark (the second most dangerous to mammals).
They are hard to study here however, "because of the strong currents and
tides." That is why Dr. Turnbull has another base of
operations in the Bahamas where he works with the "guru" of shark studies,
Sonny Gruber. ("He is to shark studies what Michael Jordan is to
basketball.") Dr. Turnbull, a former accountant with the
Hudson's Bay Company in Winnipeg who developed a yen for marine biology and
later took his doctorate at UNBSJ, says, "Sharks are the most incredible and
magnificent animals. It's partly in the way they move. They have the most
efficient design of any animal on the planet. NASA, the U.S. Navy and the
airplane industry have all studied them to see if they can replicate their
design." Dr. Turnbull says a Great White - which may range
up to 7.5 metres (25 feet) in length and weigh over two tons - "can finish off
a 400-pound [180-kilogram] elephant seal in two bites. And they hit with such
force that they first knock out their prey. "A lot of the
fear of the bigger sharks is Hollywood-induced," says Dr. Turnbull. "You have
to have a respectful fear but you have to have your wits about you too. They
can cover a long distance in a very short time." Your
chance of encountering a shark while in or under the water is minimal. Your
chance of being killed by one "is about as great of dying from bee stings,"
says Dr. Turnbull. Dr. Turnbull says that if you do
encounter a shark "it may be just passing by having a look at you. After all
you're an intruder in their environment, a rather large mammal that will be
quite strange to them." But there are a number of ways you
can tell if a shark is planning to press the attack. "If they swim in circles
around you and those circles are getting tighter and tighter, you may be in
danger."' Another measure of the shark's intent is in its posture. "If you're
trespassing on their reef, they will go into exaggerated contortions - the fins
drop straight down or the back is humped. Then it's time to get
out." But the swimmer must get out slowly - and calmly.
"Above all don't start swimming like crazy. And if you're in grave danger head
for the bottom." Dr. Turnbull has much to say about the
fabled Great White shark. He has never seen one in the flesh "but I would just
love to," he says. While he swims freely with other sharks he would prefer to
be in an anti-shark cage with Great White around. "He's the biggest and
toughest of all of them." But he says human hunters take
them out of the ocean faster than they reproduce. And unlike smaller sharks
they can't survive in captivity. Dr. Turnbull says the
Great White is protected in many jurisdictions in the world - but not in
Canadian waters. "I wish they were here," he said gazing almost wistfully up at
a portrait of one of these mammoth sharks on his office wall. "Their numbers
are declining rapidly."
©WebWise
Inc. |