* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Friday, May 30, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    Allied Gaming & Entertainment Receives Expected Nasdaq Notice Regarding Delayed Quarterly Report – Business Wire

    Allied Gaming & Entertainment Faces Nasdaq Notice Over Delayed Quarterly Report

    Weekly Entertainment Report May 29-June 1: Where to find lively arts, music, and shows – Manchester Ink Link

    Weekly Entertainment Report May 29-June 1: Where to find lively arts, music, and shows – Manchester Ink Link

    Aziz Ansari made Keanu Reeves Indian food so he wouldn’t feel ‘freaked out’ directing him in Good Fortune (exclusive) – Entertainment Weekly

    Aziz Ansari Whips Up Indian Cuisine for Keanu Reeves to Ease Directing Jitters in Good Fortune

    Cassie Ventura welcomes third child – crossroadstoday.com

    Cassie Ventura Joyfully Welcomes Her Third Child!

    Drew Brees opens Surge Entertainment Center in Metairie hot spot for new businesses – NOLA.com

    Drew Brees Unveils Exciting New Surge Entertainment Center in Metairie!

    Will Gio Stay Or Go On May 27 General Hospital? – Yahoo

    Will Gio Make a Shocking Exit on May 27th’s General Hospital

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    4Liberty Announces Collaboration with Itron to Drive Innovation in Utility Technology Adoption and Optimization – FinancialContent

    4Liberty Partners with Itron to Revolutionize Utility Technology and Boost Innovation

    Q1 2025 Quantum Technology Investment: What’s Driving the Surge in Quantum Investment? – The Quantum Insider

    Unleashing the Future: Exploring the Surge in Quantum Technology Investments for Q1 2025

    MIT Team Releases Tempting Report on Electric Aircraft Technology – AVweb

    MIT Team Releases Tempting Report on Electric Aircraft Technology – AVweb

    MSE, DXC Technology expand tech partnership – Sports Business Journal

    MSE, DXC Technology expand tech partnership – Sports Business Journal

    Technology Driving Performance: How Elite MA Plans Leverage Data, Care Coordination, and Advanced Analytics to Thrive Amid CMS’s Rigorous 2025 Standards, Black Book – Newswire.com

    Unlocking Success: How Top MA Plans Harness Data and Analytics to Excel Under CMS’s 2025 Standards

    Arqit acquires Ampliphae’s technology IP, enhancing its global encryption portfolio – GlobeNewswire

    Arqit Boosts Global Encryption Portfolio with Strategic Acquisition of Ampliphae’s Technology IP

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    Allied Gaming & Entertainment Receives Expected Nasdaq Notice Regarding Delayed Quarterly Report – Business Wire

    Allied Gaming & Entertainment Faces Nasdaq Notice Over Delayed Quarterly Report

    Weekly Entertainment Report May 29-June 1: Where to find lively arts, music, and shows – Manchester Ink Link

    Weekly Entertainment Report May 29-June 1: Where to find lively arts, music, and shows – Manchester Ink Link

    Aziz Ansari made Keanu Reeves Indian food so he wouldn’t feel ‘freaked out’ directing him in Good Fortune (exclusive) – Entertainment Weekly

    Aziz Ansari Whips Up Indian Cuisine for Keanu Reeves to Ease Directing Jitters in Good Fortune

    Cassie Ventura welcomes third child – crossroadstoday.com

    Cassie Ventura Joyfully Welcomes Her Third Child!

    Drew Brees opens Surge Entertainment Center in Metairie hot spot for new businesses – NOLA.com

    Drew Brees Unveils Exciting New Surge Entertainment Center in Metairie!

    Will Gio Stay Or Go On May 27 General Hospital? – Yahoo

    Will Gio Make a Shocking Exit on May 27th’s General Hospital

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    4Liberty Announces Collaboration with Itron to Drive Innovation in Utility Technology Adoption and Optimization – FinancialContent

    4Liberty Partners with Itron to Revolutionize Utility Technology and Boost Innovation

    Q1 2025 Quantum Technology Investment: What’s Driving the Surge in Quantum Investment? – The Quantum Insider

    Unleashing the Future: Exploring the Surge in Quantum Technology Investments for Q1 2025

    MIT Team Releases Tempting Report on Electric Aircraft Technology – AVweb

    MIT Team Releases Tempting Report on Electric Aircraft Technology – AVweb

    MSE, DXC Technology expand tech partnership – Sports Business Journal

    MSE, DXC Technology expand tech partnership – Sports Business Journal

    Technology Driving Performance: How Elite MA Plans Leverage Data, Care Coordination, and Advanced Analytics to Thrive Amid CMS’s Rigorous 2025 Standards, Black Book – Newswire.com

    Unlocking Success: How Top MA Plans Harness Data and Analytics to Excel Under CMS’s 2025 Standards

    Arqit acquires Ampliphae’s technology IP, enhancing its global encryption portfolio – GlobeNewswire

    Arqit Boosts Global Encryption Portfolio with Strategic Acquisition of Ampliphae’s Technology IP

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Evolutionary Ingenuity: How Ancient Sharks Survived Earth’s Hottest Oceans

June 3, 2024
in Science
Evolutionary Ingenuity: How Ancient Sharks Survived Earth’s Hottest Oceans
Share on FacebookShare on Twitter

Thresher Shark

During a significant warming event 93 million years ago, some sharks developed elongated pectoral fins to adapt to hotter ocean temperatures, a change documented in a recent study. These adaptations helped them transition from bottom dwellers to efficient open-water predators, a response that modern sharks may struggle to emulate given today’s rapid climate change.

Climate Change Was No Problem for the Big Fish

Research shows that sharks evolved from bottom dwellers to open ocean predators during a past global warming event, adapting with physical changes like elongated fins to become more efficient swimmers.

The sharks we know today as the open ocean’s top predators evolved from stubby bottom dwellers during a dramatic episode of global warming millions of years ago.

A massive outpouring of volcanic lava about 93 million years ago sent carbon dioxide levels soaring, creating a greenhouse climate that pushed ocean temperatures to their hottest. University of California, Riverside (UCR) researchers discovered that some sharks responded to the heat with elongated pectoral fins.

Scientific Discovery and Analysis

This discovery is documented in a paper published today (June 3) in the journal Current Biology. It was made by taking body length and fin measurements from over 500 living and fossilized shark species.

“The pectoral fins are a critical structure, comparable to our arms,” said UCR biology doctoral student and paper first author Phillip Sternes. “What we saw upon review of a massive data set, was that these fins changed shape as sharks expanded their habitat from the bottom to the open ocean.”

Shark Pectoral Fins

Sharks that live in different parts of the ocean, and their respective pectoral fins. Credit: Phillip Sternes/UCR

Adaptations and Efficiency

Longer pectoral fins help make shark movements much more efficient. “Their fins are comparable to the wings of commercial airplanes, long and narrow, to minimize the amount of energy needed for movement,” Sternes said.

The researchers also saw that the open-water sharks got faster compared to bottom dwelling sharks. “Shark muscle is very sensitive to temperature,” said Tim Higham, professor in UCR’s Department of Evolution, Ecology, and Organismal Biology and paper co-author.

“The data helped us make a correlation between higher temperatures, tail movement, and swimming speeds,” Higham said.

Habitats and Evolutionary Pressures

Most living shark species are still bottom dwellers, occupying what scientists refer to as the benthic zone. These benthic sharks do not loom as large in popular culture as their fierce open-water relatives. Many of the bottom dwellers are slender, flatter, more medium-sized predators.

Only about 13% of modern sharks are fast-swimming open-water predators. The researchers believe that breathing may have become difficult for their ancient relatives. Oxygen levels near the bottom during the Cretaceous period likely dropped as the heat increased.

Temperature Trends and Historical Context

Modern sea surface temperatures average about 68 degrees Fahrenheit. In the Cretaceous they were much warmer, reaching an average of about 83 degrees. The high heat of the Cretaceous did not happen overnight, and neither did the sharks’ evolution.

“We had pretty warm open-sea surface temperatures throughout the era, and then a distinct spike that took place over a one- or two-million-year period,” said associate professor at Claremont McKenna College and paper co-author Lars Schmitz.

Evolutionary Impact of Climate Change

As global warming drove an evolution in some groups of animals, including sharks, it caused the extinction of others. Because those evolutionary changes happened on a longer time scale in the past, it is difficult to predict exactly how sharks or other marine life will respond to current warming trends.

Biologists are seeing some sharks, including tropical species like tiger and bull sharks, starting to swim farther north. But it is unclear whether threatened sharks will again be able to adapt where they live and survive the rapidly increasing heat.

“The temperature is going up so fast now, there is nothing in the geologic record I am aware of that we can use for a true comparison,” Sternes said.

Reference: “The rise of pelagic sharks and adaptive evolution of pectoral fin morphology during the Cretaceous” 3 June 2024, Current Biology.
DOI: 10.1016/j.cub.2024.05.016

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : SciTechDaily – https://scitechdaily.com/evolutionary-ingenuity-how-ancient-sharks-survived-earths-hottest-oceans/

Tags: evolutionaryIngenuityscience
Previous Post

Inside the Crystal Matrix: New “X-Ray Vision” Technique Sees Inside Crystals

Next Post

NFL Coach: Commanders OC Kingsbury Has ‘a Better Feel for’ Running an NFL Offense Now

Even birds can’t out-fly climate change – Phys.org

Even birds can’t out-fly climate change – Phys.org

May 30, 2025
Opinion | How China’s maritime strategy is swapping force for research diplomacy – South China Morning Post

Opinion | How China’s maritime strategy is swapping force for research diplomacy – South China Morning Post

May 30, 2025
Newly discovered ‘ghost’ lineage linked to ancient mystery population in Tibet, DNA study finds – Live Science

Unveiling the Secrets of Tibet: A Fascinating ‘Ghost’ Lineage Revealed by DNA Study

May 30, 2025
‘Wicked,’ gardening and Amy Sedaris: 7 events this week – Albuquerque Journal

‘Wicked,’ gardening and Amy Sedaris: 7 events this week – Albuquerque Journal

May 30, 2025
Yankees have a busload of momentum heading into World Series rematch against Dodgers – AP News

Yankees have a busload of momentum heading into World Series rematch against Dodgers – AP News

May 30, 2025
Economists blame Trump tariffs, AI explosion for threatening global economy – theregister.com

How Trump’s Tariffs and the AI Boom Are Shaking Up the Global Economy

May 30, 2025
Allied Gaming & Entertainment Receives Expected Nasdaq Notice Regarding Delayed Quarterly Report – Business Wire

Allied Gaming & Entertainment Faces Nasdaq Notice Over Delayed Quarterly Report

May 30, 2025
UMC Health System, Texas Tech HSC to honor endowed chairs, professors – Lubbock Avalanche-Journal

Celebrating Excellence: UMC Health System and Texas Tech HSC Honor Distinguished Professors and Endowed Chairs

May 30, 2025
Paris on Politics: Israel-Gaza conflict gets personal in Chicago’s City Council – FOX 32 Chicago

Paris on Politics: Israel-Gaza conflict gets personal in Chicago’s City Council – FOX 32 Chicago

May 30, 2025
Anduril and Meta Team Up to Transform XR for the American Military – Anduril

Revolutionizing Military Training: Anduril and Meta Join Forces to Enhance XR Technology

May 30, 2025

Categories

Archives

May 2025
MTWTFSS
 1234
567891011
12131415161718
19202122232425
262728293031 
« Apr    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (651)
  • Economy (664)
  • Entertainment (21,571)
  • General (15,248)
  • Health (9,706)
  • Lifestyle (666)
  • News (22,149)
  • People (666)
  • Politics (672)
  • Science (15,886)
  • Sports (21,170)
  • Technology (15,651)
  • World (652)

Recent News

Even birds can’t out-fly climate change – Phys.org

Even birds can’t out-fly climate change – Phys.org

May 30, 2025
Opinion | How China’s maritime strategy is swapping force for research diplomacy – South China Morning Post

Opinion | How China’s maritime strategy is swapping force for research diplomacy – South China Morning Post

May 30, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version