Bajau 'sea nomads' developed enlarged spleens for deep diving

The new study found that the spleens of the Bajau people who live in Jaya Bakti are 50 per cent larger than those of their land-dwelling neighbours the Saluan

The group is known as "sea nomads", given their sea-dependent traditions: The Bajau spend almost two-thirds of their work day in the water diving to collect crustaceans and sea cucumbers or spearfish octopuses and other aquatic food at depths as far as 230 feet, researchers said. Members of the Bajau can dive up to 70 meters with nothing more than a set of weights and a pair of wooden goggles.

But while the Bajau people's talents have always been known, it was unclear whether the skill was the result of practice, as in the case of the excellent underwater vision of Thai "sea nomad" children, or the result of adaptations which have their roots in the Bajau people's DNA.

The evolutionary quirk, developed over hundreds or thousands of years, enables the Bajau tribe of "fish people" in Indonesia to work eight-hour diving shifts to spear fish and octopus for their families. Their fascinating abilities have prompted the University of Copenhagen and the University of California-Berkeley to conduct scientific studies on the anatomy of the Bajau people and the results were shared on the Cell. "There's nothing like seeing them in the water".

Anthropologist Cynthia Beall from Case Western Reserve University in Cleveland, Ohio, isn't yet convinced Ilardo and her colleagues fully understand what's happened with the Bajau.

A second genetic adaptation associated with the Bajau involves the constriction of blood vessels in the extremities to preserve oxygen for vital organs. Lastly, the spleen contracts. Ilardo measured their spleen sizes using an ultrasound machine and took saliva samples for genomic sequencing. "I hadn't really heard much about the spleen". Its roles include filtering out old cells and supporting the immune system.

Among populations living at high altitudes, who also have to cope with low oxygen levels, researchers have previously found different genetic adaptations that converge on the same phenotype, all in some way affecting red blood cell count, notes Theodore Schurr, an anthropological geneticist at the University of Pennsylvania who was not involved in the study. She explained that the connection between genetics, enlarged spleen and diving has not been made before in humans.

The brand new examine discovered that the spleens of the Bajau individuals are 50 per cent bigger than these of their land-dwelling neighbours, the Saluan.

Court Upholds Ruling Barring US From Punishing Sanctuary Cities
The term sanctuary city loosely refers to jurisdictions that in some way do not cooperate with federal immigration enforcement. Manion, agreed with the decision as it related to Chicago but said the ruling should not apply nationwide.

But while the Bajau people's talents have always been known, it was unclear whether the skill was the result of practice. Ilardo chose to see whether Bajau spleens were similarly special. The gene is thought to alter spleen size by adjusting thyroid hormone levels.

"We believe that in the Bajau they have an adaptation that increases Thyroid hormone levels and therefore increases their spleen size", added Miss Ilardo.

Dr. Rodney C. Jubilado from the University of Hawaii who was not a part of the study stated that he first aw the Bajau people when he lived on the Samal Island in the Philippines and was always "fascinated" by them. "There we saw this hugely significant difference", she says. Moon studies how the human body responds to both high altitudes and extreme depths.

In mice, "PDE10A is known for regulating a thyroid hormone that controls spleen size, lending support for the idea that the Bajau might have evolved the spleen size necessary to sustain their long and frequent dives, ' said the study".

They spend 60 percent of their daily working time underwater and can stay underwater for up to 13 minutes at a time, the study said. "They are just spending an extraordinarily long time underwater compared to their recovery time". Their heart rates slow; blood is shunted into the body's core, and the spleen contracts, releasing some of its store of oxygenated red blood cells.

"They're explorers, so I think they're inherently curious and want to know more about the world, including about their own biology", she says.

Related News:

  • Barclays chief acted without

    Barclays chief acted without "due skill and care"

    ISS's recommendations were outlined in a report published before the FCA and PRA probes were known to have been completed. Staley has a period during which he may review the decision. "This was a mistake on my part and I apologise for it".
    David Copperfield's Disappearing Act Exposed In Negligence Lawsuit

    David Copperfield's Disappearing Act Exposed In Negligence Lawsuit

    David Copperfield is one of the highest earning entertainers in the world, with his net worth listed by Forbes as $800m in 2018. The tick starts out with Copperfield choosing 13 members from the audience and have them sit on a platform up on the stage.
    Academy of Country Music Awards recap

    Academy of Country Music Awards recap

    Reba McEntire will also perform and is hosting the show, a year after Bryan and Dierks Bentley hosted. Kenny Chesney delivered the first performance, singing his new song " Get Along ".
  • James Comey's memos about Trump meetings revealed

    James Comey's memos about Trump meetings revealed

    Much of what is in the memos, most notably Mr Trump's demand that Mr Comey pledge his loyalty, has been known for almost a year. The documents reflect Trump's uneasiness about that investigation, though not always in ways that Comey seemed to anticipate.

    "Devastated" AMP CEO announces immediate resignation

    Former IAG chief executive Mike Wilkins, who joined AMP's board in 2016, will replace Mr Meller on an interim basis. Witness Jacqueline McDowall (pictured) leaves the banking services royal commission in Melbourne on Thursday.
    Alex Rodriguez's Nephew, Norberto Susini, Abducted & Ransomed During Lamborghini Sale

    Alex Rodriguez's Nephew, Norberto Susini, Abducted & Ransomed During Lamborghini Sale

    When Susini refused, Vucetovic and Gilkes then held Susini captive as they reached out to associates to demand a $35,000 ransom. Norberto Susini plays minor-league baseball but, according to the Post , slinging high priced vehicles is his "side hustle".
  • MI  mother leaves Two Women in suitcase

    MI mother leaves Two Women in suitcase

    According to authorities, when they arrived, they saw the woman drop luggage next to the trash before fleeing from the scene. Police say a 26-year-old MI mother left her two infant daughters inside a suitcase next to garbage on the side of the road.
    NFL Program: Eagles and Falcons to Open Season

    NFL Program: Eagles and Falcons to Open Season

    Sunday, Nov. 18, 1 p.m. - Eagles at Saints: Former Eagles cornerback Patrick Robinson returns an interception for a touchdown. However, the Philadelphia Inquirer is reporting the Eagles will host the Falcons in Week 1 .

    Express Scripts Holding Company (NasdaqGS:ESRX) EBITDA Yield & Shareholder Return Update

    The stock of Express Scripts Holding Company (NASDAQ: ESRX ) has "Buy" rating given on Wednesday, January 13 by Mizuho. The Ontario - Canada-based Royal Bank Of Canada has invested 0.02% in Express Scripts Holding Company (NASDAQ: ESRX ).
  • It's always wonderful to walk with Deepika Padukone :Ranbir Kapoor

    It's always wonderful to walk with Deepika Padukone :Ranbir Kapoor

    The duo looked stunning as the showstopper, wearing beautifully embroidered dresses from the acclaimed designer's collection. When Deepika was asked of her experience of walking the ramp with Ranbir, she said: "It's very exciting.
    Jose Mourinho Omits Some Big Players For Man United's Clash V Bouremouth

    Jose Mourinho Omits Some Big Players For Man United's Clash V Bouremouth

    That clinched United's sixth win in their last seven league games, but all eyes remained on Pogba. I know why you win and I know why you don't win.
    Dutch Gambling Authority Gives Game Developers Deadline to Fix Illegal Loot Boxes

    Dutch Gambling Authority Gives Game Developers Deadline to Fix Illegal Loot Boxes

    Developers of the four games in violation of these laws have been given eight weeks to adjust their loot boxes to meet guidelines. Games like League of Legends, Counter-Strike: Global Offensive, FIFA, and Overwatch might be affected by the new rule.


Most liked

Walt Disney's (DIS) "Conviction-Purchase" Rating Setd at Goldman Sachs Group Inc
It worsened, as 35 investors sold FLEX shares while 113 reduced holdings. 162 funds opened positions while 508 raised stakes. When we divide the last trade volume by the 3-month average volume, we found out a relative volume of 0.70.

Comey v. Trump: When sinners collide
The source said the Justice Department did make some redactions to the memos, though it was unclear what they were. Comey also told Tapper, incredibly, that he wasn't sure of how many memos there were, or how many were classified.

The Queen of England suffers from a serious loss
Apart from her particularity regarding protocol and Royal traditions, Queen Elizabeth's love for dogs is known to nearly everyone. Willow was the 14th generation descended from Susan, a corgi gifted to the then Princess Elizabeth on her 18th birthday in 1944.

Lokesh, Srin Raju, Ravi Prakash, RGV designed the conspiracy: Pawan
He also questions RGV by asking him how he would feel if others abuse his mother or family members. He has named them as Dream team.

Mohamed Salah named in PFA Team of the Year
De Bruyne and Silva are also shortlisted for the PFA's player of the year award, along with Leroy Sane. The PFA Team of the Year once was a hotbed for Republic of Ireland internationals.

EPS for Barrick Gold Corporation (ABX) Expected At $0.20 on April, 23
The basic materials company reported $0.22 earnings per share for the quarter, topping the consensus estimate of $0.20 by $0.02. Omers Administration Corp decreased Intuit (NASDAQ:INTU) stake by 10,600 shares to 38,079 valued at $6.01 million in 2017Q4.

Gopher tortoise found spray painted red
With the concrete chipped off, for the most part, she said it's also walking much better and is eager to get moving again. She stated if her staff at Swamp Girls Adventures and she saw him they realized they needed to do something.

How Trump plans to arm the world with USA weapons
White House trade advisor Peter Navarro noted in a conference call that "Chinese replicas" of American drone technology are being "deployed on the runways in the Middle East".

Forecast: Sunny today and Friday; chance of rain remains for the weekend
The upper-level low associated with the system will move across the region Wednesday with a chance for scattered showers. Rain and snow showers taper off Friday afternoon and evening as high pressure builds east from the Great Lakes.

Blackstone Group LP (BX) Position Raised by Adell Harriman & Carpenter Inc
BX traded at an unexpectedly high level on 04/18/2018 when the stock experienced a 0.95% gain to a closing price of $31.78. On Thursday, October 19 the stock of The Blackstone Group L.P. (NYSE:BX) has "Buy" rating given by Keefe Bruyette & Woods.

Brokerages Expect General Mills, Inc. (GIS) to Announce $0.77 EPS
Current trade price levels places GIS's stock about -26.30% away from the 52-week high and closed 2.03% away from the 52-week low. It turned negative, as 82 investors sold CAH shares while 236 reduced holdings. 53 funds opened positions while 97 raised stakes.

Syria air strikes: Russian Federation denies tampering with suspected chemical attack site
Secretary General António Guterres issued a statement on the situation in Syria expressing full support for the OPCW inspection. Corbyn said May should remember she "is accountable to this Parliament, not to the whims of the USA president".

Iraq carries out 'deadly' airstrike on Daesh targets in Syria
In total 103 foreigners have been given the death penalty with another 185 receiving life sentences . At least 150 were sentenced to life imprisonment while 341 were sentenced to other jail terms.

Broncos' 2018 schedule released
And Aqib Talib will return to Denver when the Broncos face the Los Angeles Rams in week 6 on FOX31. Both teams will look considerably different this season, four years removed from that blowout.

Ariana Grande Premieres Moving New Single 'No Tears Left To Cry'
Yesterday, she unveiled a new look in the teaser photos for her new single; a platinum blonde, low ponytail. Directed by Dave Meyers , the stunning clip finds Ariana in the midst of surreal skyscrapers at night.