News / Science & Technology

    Researchers Find Great White Shark Population Growing in Pacific

    FILE - A great white shark swims near Guadalupe Island off the coast of Mexico.
    FILE - A great white shark swims near Guadalupe Island off the coast of Mexico.
    Reuters
    A new look at research on great white sharks in the eastern north part of the Pacific Ocean indicates the population is likely growing rather than endangered, according to an international research team.

    "The good news is that white sharks are returning to levels of abundance," said George Burgess, director of the Florida Program for Shark Research, who led the new study published Monday in the journal PLOS ONE.

    The findings upend an impression of alarming low numbers left by a 2011 Stanford University study which led to petitions by conservationists to add white sharks to state and federal endangered lists, Burgess said.

    Stanford researcher Barbara Block said in an emailed statement to Reuters the data in the two studies is not inconsistent.

    "We stand firmly behind the findings of our study, and our ongoing research only increases our confidence in its accuracy," Block wrote.

    Great whites are the largest of the predatory big-toothed, flesh-eating sharks, growing as big as 20 feet long (about 6.1 meters).

    Burgess credits the growth in sharks to 40 years of U.S. federal protections for marine mammals that sharks feed on, especially sea lions and seals. In addition, white sharks have been protected as a prohibited species, making it illegal to bring a great white to dock.

    Burgess said he and some other shark experts "did a double take" when the Stanford researchers calculated the population of adult and near-adult great whites along the central California coast at 219.

    The Burgess study claims that the Stanford researchers then claimed inappropriately the 219 count represented half of the adult and near-adult population in the entire eastern north Pacific, which runs from Alaska down to Central America.

    Burgess' group of 10 international shark scientists set out to test the Stanford data and methods. The group pegged the entire population of white sharks along the whole California coast at more than 2,000 and likely rising.

    Burgess said Stanford researchers made assumptions about the white shark population from those feeding off seals and sea lions at Farallon Islands and Tomales Point. Burgess said they should have taken into account sharks that feed elsewhere and for juvenile sharks whose numbers appear to be growing.

    The Stanford study also made comparisons between the low number of sharks and the greater numbers of killer whales and polar bears. Burgess said the comparison was misleading given the greater ease of counting whales, which must surface for air, and bears on land.

    Burgess said data from the U.S. east coast indicate shark populations growing there, too.

    Previews of Burgess' team's study were given to state and federal authorities which factored in decisions to maintain white sharks level of protection rather than step it up, he said.

    Burgess said it is important to avoid listing a species as endangered if it does not need that level of protection to conserve resources for species that do need help.

    "This is a real pleasure for us in the biology business to be talking about because it's a success story," Burgess said.

    You May Like

    Multimedia Obama Calls on Americans to Help the Families of Its War Dead

    In last Memorial Day of his presidency, Obama lays wreath at the Tomb of the Unknown Soldier at Arlington National Cemetery

    The Strife of the Party: Will Trump Permanently Alter Republicans?

    While billionaire mogul's no-holds-barred style, high-energy delivery are what rocketed him to nomination, they also have created rift between party elites and his supporters

    China's Education Reforms Spark Protest

    Beijing is putting a quota system in place to increase the number of students from poor regions attending universities

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    Tech Startups Showcase Wares at Amsterdam Conferencei
    X
    Serginho Roosblad
    May 30, 2016 5:11 PM
    More than 20,000 tech enthusiasts, entrepreneurs and lovers of digital technology came together in Amsterdam recently at the Next Web Conference to discuss the latest developments in digital technology, look to the future and, of course, to connect. In recent years, there has been an explosion of so-called startup businesses that have created devices and applications that have changed the way we live; but, as Serginho Roosblad reports for VOA, there are pitfalls for such startups as well.
    Video

    Video Tech Startups Showcase Wares at Amsterdam Conference

    More than 20,000 tech enthusiasts, entrepreneurs and lovers of digital technology came together in Amsterdam recently at the Next Web Conference to discuss the latest developments in digital technology, look to the future and, of course, to connect. In recent years, there has been an explosion of so-called startup businesses that have created devices and applications that have changed the way we live; but, as Serginho Roosblad reports for VOA, there are pitfalls for such startups as well.
    Video

    Video US Military's Fallen Honored With Flags

    Memorial Day is a long weekend for most Americans. For some, it is the unofficial start of summer -- local swimming pools open and outdoor grilling season begins. But Memorial Day remains true to its origins -- a day to remember the U.S. military's fallen.
    Video

    Video Rolling Thunder Rolls Into Washington

    The Rolling Thunder caravan of motorcycles rolled into Washington Sunday, to support the U.S. military on the country's Memorial Day weekend
    Video

    Video A New Reading Program Pairs Kids with Dogs

    Dogs, it is said, are man's best friend. What some researchers have discovered is that they can also be a friend to a struggling reader. A group called Intermountain Therapy Animals trains dogs to help all kinds of kids with reading problems — from those with special needs to those for whom English is a second language. Faiza Elmasry has more on the New York chapter of R.E.A.D., or Reading Education Assistance Dogs, in this piece narrated by Faith Lapidus.
    Video

    Video Fan Base Grows for Fictional Wyoming Sheriff Longmire

    Around the world, the most enduring symbol of the U.S. is that of the cowboy. A very small percentage of Americans live in Western rural areas, and fewer still are cowboys. But the fascination with the American West is kept alive by such cultural offerings as “Longmire,” a series of books and TV episodes about a fictional Wyoming sheriff. VOA’s Greg Flakus recently spoke with Longmire’s creator, Craig Johnson, and filed this report from Houston.
    Video

    Video Chinese-Americans Heart Trump, Bucking National Trend

    A new study conducted by three Asian-American organizations shows there are three times as many Democrats as there are Republicans among Asian-American voters, and they favor Hillary Clinton over Donald Trump. But one group, called Chinese-Americans For Trump, is going against the tide and strongly supports the business tycoon. VOA’s Elizabeth Lee caught up with them at a Trump rally and reports from Anaheim, California.
    Video

    Video Reactions to Trump's Success Polarized Abroad

    What seemed impossible less than a year ago is now almost a certainty. New York real estate mogul Donald Trump has won the number of delegates needed to secure the Republican presidential nomination. The prospect has sparked as much controversy abroad as it has in the United States. Zlatica Hoke has more.
    Video

    Video Drawings by Children in Hiroshima Show Hope and Peace

    On Friday, President Barack Obama will visit Hiroshima, Japan, the first American president to do so while in office. In August 1945, the United States dropped an atomic bomb on the city to force Japan's surrender in World War II. Although their city lay in ruins, some Hiroshima schoolchildren drew pictures of hope and peace. The former students and their drawings are now part of a documentary called “Pictures from a Hiroshima Schoolyard.” VOA's Deborah Block has the story.
    Video

    Video Vietnamese Rapper Performs for Obama

    A prominent young Vietnamese artist told President Obama said she faced roadblocks as a woman rapper, and asked the president about government support for the arts. He asked her to rap, and he even offered to provide a base beat for her. Watch what happened.
    Video

    Video Roots Run Deep for Tunisia's Dwindling Jewish Community

    This week, hundreds of Jewish pilgrims are defying terrorist threats to celebrate an ancient religious festival on the Tunisian island of Djerba. The festivities cast a spotlight on North Africa's once-vibrant Jewish population that has all but died out in recent decades. Despite rising threats of militant Islam and the country's battered economy, one of the Arab world's last Jewish communities is staying put and nurturing a new generation. VOA’s Lisa Bryant reports.

    Special Report

    Adrift The Invisible African Diaspora