Study: Great white sharks will be swimming in British waters by 2050
As a result of warming seas, at least 10 types of sharks currently found in warmer areas will likely be found in British waters in coming decades.
Great white sharks will likely start moving north as warming seas open new habitats for the predatory fish, according to a new study.
The study, led by Ken Collins at the University of Southampton, predicts that at least 10 types of shark currently found in warmer places, like the Mediterranean and coast of Africa, will be swimming in British waters in coming decades.
“These include the likes of blacktips, sand tigers and hammerheads, which are currently found swimming off the coasts of Spain and Portugal,” Collins said.
Collins, a Senior Research Fellow within Ocean and Earth Science, National Oceanography Centre Southampton at the University of Southampton, said the changes are the result of climate change, which poses threats to shark populations worldwide.
“Though while the potential number of shark species may increase in the next few decades, the overall number of sharks, especially the larger ones, will fall as a result of overfishing, plastic waste and climate change.”
(Image: Nat Geo WILD)
He elaborated in an interview with The Independent:
“We will increase from 40 species to maybe 60, but there will still be less of them—and some of the existing ones will maybe go extinct in the meantime... They are getting rarer and rarer—and it’s the big sharks that have the problem because people target them.”
Shark migration patterns also seem to be changing in other parts of the world’s oceans. Earlier this year, National Geographic spoke with marine biologist Stephen Kajiura, who’s been tracking blacktip sharks for more than a decade.
“This year has been strange,” he said.
During the colder months, blacktip sharks normally swim south from North Carolina to Florida, but this year researchers noticed that only one-third of the usual number of blacktips had migrated south. They suspect the sharks are staying north because of warmer waters.
“Last year was unusually warm all winter: The water temperatures never got below 73.4 Fahrenheit,” Kajiura said. “This year, the temperatures have risen dramatically to 78.8 Fahrenheit. It’s now even hotter than this time last year.”
Sharks can disrupt marine ecosystems when they relocate or change migration patterns. An increase of sharks in a region can result in the extinction of other types of marine life, including other species of shark.
Conversely, the disappearance of sharks from an area they once inhabited, like the Florida coast, can spell disaster for coral reefs and seagrasses because sharks help keep the “ecosystem healthy by weeding out weak and sick fish,” as National Geographic reported.
Pay attention to the decisions made by the provinces.
- China leads the world in numerous green energy categories.
- CO2 emissions in the country totaling more than all coal emissions in the U.S. have recently emerged.
- This seems to be an administrative-induced blip on the way towards a green energy tipping point.
NASA astronomer Michelle Thaller is coming back to Big Think to answer YOUR questions! Here's all you need to know to submit your science-related inquiries.
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All you have to do is submit your questions to the form below, and we'll use them for an upcoming Q+A session with Michelle. You know what to do, Big Thinkers!
Or how I learned to stop worrying and love my tsundoku.
- Many readers buy books with every intention of reading them only to let them linger on the shelf.
- Statistician Nassim Nicholas Taleb believes surrounding ourselves with unread books enriches our lives as they remind us of all we don't know.
- The Japanese call this practice tsundoku, and it may provide lasting benefits.
Calling all big thinkers!
The Boring Company plans to offer free rides in its prototype tunnel in Hawthorne, California in December.
- The prototype tunnel is about 2 miles long and contains electric skates that travel at top speeds of around 150 mph.
- This is the first tunnel from the company that will be open to the public.
- If successful, the prototype could help the company receive regulatory approval for much bigger projects in L.A. and beyond.
Money makes the world go 'round. Unfortunately, it can make both children and adults into materialists.
- Keeping a gratitude journal caused children to donate 60 percent more to charitable causes.
- Other methods suggested by researchers include daily gratitude reflection, gratitude posters, and keeping a "gratitude jar."
- Materialism has been shown to increase anxiety and depression and promote selfish attitudes and behavior.
Anatomy and physiology professor David Harper claims a recent study in The Lancet is flawed.
- The low-carbohydrate group in a recent Lancet study were typically middle-aged, obese, sedentary, diabetic smokers.
- The study was not a randomized, controlled, double-blind experiment.
- Harper has been in ketosis for six years, and says it has profound effects on cancer patients, among other chronic ailments.
A mind-bending paradox questions the nature of reality.
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- It may be more likely for a Boltzmann Brain to come into existence than the whole Universe.
- The idea highlights a paradox in thermodynamics.
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