Atlantis Online
April 22, 2018, 07:25:31 am
Welcome, Guest. Please login or register.

Login with username, password and session length
News: THE SEARCH FOR ATLANTIS IN CUBA
A Report by Andrew Collins
http://www.andrewcollins.com/page/articles/atlantiscuba.htm
 
  Home Help Arcade Gallery Links Staff List Calendar Login Register  

Swarms of Huge Sharks Discovered, Baffling Experts

Pages: [1]   Go Down
  Print  
Author Topic: Swarms of Huge Sharks Discovered, Baffling Experts  (Read 7 times)
Christiana Hanaman
Superhero Member
******
Posts: 4982



« on: April 13, 2018, 07:57:43 am »


Swarms of Huge Sharks Discovered, Baffling Experts



National Geographic logo National Geographic   
National Geographic

http://www.msn.com/en-us/news/us/swarms-of-huge-sharks-discovered-baffling-experts/ar-AAvOv6Y?ocid=ientp

Cecelia Smith-Schoenwalder

14 hrs ago




SHARE

 
 
 
 
 
 
 
 




 

Officials: Items found belonged to missing California family
 



a view of a swimming pool: Basking sharks may look ominous, but their open mouth serves to filter zooplankton and other small creatures through their gill rakers.© Photograph by Nick Caloyianis, National Geographic Creative Basking sharks may look ominous, but their open mouth serves to filter zooplankton and other small creatures through their gill rakers. 
Swarms of up to over a thousand basking sharks have been spotted along the northeastern U.S., puzzling experts who study the normally solitary species.

Aerial surveys meant to locate endangered North Atlantic right whales in recent decades have revealed massive groups of the world's second-largest fish. Found worldwide, these slow-moving filter feeders pose no threat to humans.

As big as basking sharks are—at 32 feet longoutsized only by the whale shark—the deep-sea dwellers can be tricky to track down.

And without reviewing the surveys, "that data was hiding away," says Leah Crowe, leader of a recent study on the phenomenon and a field biologist at the National Oceanic and Atmospheric Administration's Northeast Fisheries Science Center. "Our goal is not to do that with our research." (Read about a huge basking shark caught off Australia.)

In the study, published in the Journal of Fish Biology Crowe and colleagues documented 10 sightings of large groups of basking sharks between 1980 and 2013 along the coast of Nova Scotia to Long Island.

The researchers uncovered about 10,000 documented sightings of basking sharks in the database, and 99 percent were of groups of seven or less.

Why Gather?

Shark experts have several theories about why basking sharks would congregate. Other shark species are known to gather for feeding, mating, and protection from predators.


A record-breaking sighting of about 1,400 sharks in November 2013 off southern New England included several young sharks, which to Crowe indicates that the group was likely feeding on zooplankton instead of mating. (See "Pictures: Biggest Whale Shark 'Swarm' Found.")

The study also suggests that the sharks could be gathering to reduce the drag caused by their open mouths during feeding, allowing them to draft off each other to conserve energy.

But aerial sightings only reveal so much.

"Seeing them from the air is interesting, but it doesn’t tell us that much about the environmental factors," such as the density of plankton, Crowe says.

Shark Mystique

Gregory Skomal, a senior fisheries scientist for the Massachusetts Division of Marine Fisheries, agreed that aerial data is limited in explaining the cause of the swarms.


Skomal has swum among a basking shark gathering, but he does not recommend sending people in to collect data, as their presence would cause the animals to act differently.

Such aggregations "build on the mystique of the animal," says Skomal, who was not involved in the research.

But the public can help scientists in their quest via the citizen science program "Spot a Basking Shark," run by the Pacific Shark Research Center at Moss Landing Marine Laboratories. (Read about an unexpected basking shark hideout.)

Basking sharks spend about 90 percent of their time deep underwater, and only 10 percent at the surface—making any sightings valuable information, according to Dave Ebert, program director for the research center.

"Species of Concern"

Learning as much as possible about the behemoths is crucial, as some basking shark populations have fallen—the U.S. government deemed the eastern North Pacific "a species of concern" in 2010.


In the 20th century, hunting for sharks' liver oils and hides reduced their population along the U.S. West Coast, and basking shark numbers have remained low in recent decades, Ebert says.

He adds a caveat: "When I say low, we're not really sure what the baseline was to begin with."

"If you don’t see them, that doesn’t mean they aren't around."


 

Stranger on Plane Adopts Woman's Son
 








 

by Taboola



Promoted Links
MORE FOR YOU







Yale Cardiologist Reveals 3 Foods Making Us Fat

Gundry MD











Husband Discovers Wife’s True Identity In A Lock Box Years After She Dies

NewsD









Natalie From 'The Facts of Life' Is Grown Up And Gorgeous

Miss Penny Stocks









Friend: Mom sent 3 a.m. text days before SUV cliff crash
Associated Press on MSN








Teens dreamed of future together before their grisly deaths
Associated Press on MSN








CDC Urges Everyone 50 and Older to Get New Vaccine
Money Talks News on MSN








Remember Her? She is the Inspiration Behind the Most Beautiful Song Ever Written!

Domesticated Companion









Here’s Why Guys Are Obsessed With This Underwear…

The Weekly Brief | Mack Weldon









3 Ways Your Dog Asks For Help

Dr. Marty









We're learning more about what led to Conor
McGregor's bizarre attack on a bus of fighters at a UFC event
McGregor's bizarre attack on a bus of fighters at a UFC eventBusiness Insider on MSN








Seventh body linked to Toronto suspect
BBC News on MSN








China's Xi attends massive naval display
BBC News on MSN








Actress Shares Her Secret: "Eating This Every Morning Changed My Life"

ActivatedYou Supplements









How To: Boost Telomeres At Home

LCR Health









Best & Worst Refinance Mortgage Companies in Wisconsin

Comparisons.org









Air Force officer charged over solicitation of graphic photos
The Hill on MSN








Verne Troyer Placed on Involuntary Psychiatric Hold
After Police Called to His Home: Report
After Police Called to His Home: ReportETOnline on MSN








World's Chillest Baby Is Born
Cosmopolitan on MSN








How Billionaires Make $1 Million Per Day with "Kennedy Accounts"

CleverMoneyTips









#1 Amazing Benefit That Most Veterans Aren't Using

The Mortgage Reports









The Return of the CD - 2018's Biggest Investment Opportunity

Bankrate











Go to MSN Home
 
Go to MSN News
     







AdChoices











MORE FROM MSN







Teen turns down plea deal for 25 years in
prison, gets 65 years instead
Report Spam   Logged

Social Buttons



Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by EzPortal
Bookmark this site! | Upgrade This Forum
SMF For Free - Create your own Forum | Buy traffic for your forum/website
Powered by SMF | SMF © 2016, Simple Machines