Scientists use ultrasounds to study shark reproduction

BIDDEFORD, Maine -- Scientists say ultrasound technology normally used on pregnant women can be used to gain insights about the reproduction of tiger sharks.

See Full Article

Researchers from the University of New England and University of Miami say their study of the use of ultrasounds on the sharks offers a less invasive way to investigate the sharks' biology.

They say the ultrasounds allow scientists a way to determine the presence of embryos in sharks while keeping the animals alive. Previous efforts normally involved dissecting the animals.

The researchers performed in-water ultrasounds on live tiger sharks and took blood samples for hormone analysis at Tiger Beach in the Bahamas.

University of New England professor James Sulikowski says the research found that a high number of tiger sharks were pregnant during the winter months.



Advertisements

Latest Tech & Science News

  • Moon dust collected by Neil Armstrong sold for $1.8 million

    Tech & Science CTV News
    NEW YORK -- A bag containing traces of moon dust sold for $1.8 million at an auction on Thursday following a galactic court battle. The collection bag, used by astronaut Neil Armstrong during the first manned mission to the moon in 1969, was sold at a Sotheby’s auction of items related to space voyages. Source
  • Moon dust collected by Neil Armstrong sold for US$1.8 million

    Tech & Science CTV News
    NEW YORK -- A bag containing traces of moon dust sold for $1.8 million at an auction on Thursday following a galactic court battle. The collection bag, used by astronaut Neil Armstrong during the first manned mission to the moon in 1969, was sold at a Sotheby’s auction of items related to space voyages. Source
  • China announces goal to dominate AI field by 2030

    Tech & Science CTV News
    BEIJING -- China’s government has announced a goal of becoming a global leader in artificial intelligence in just over a decade, putting political muscle behind growing investment by Chinese companies in developing self-driving cars and other advances. Source
  • Cops wage psychological warfare against online drug bazaars

    Tech & Science CTV News
    HOUSTON - In an innovative blow to illicit internet commerce, cyberpolice shut down the world's leading "darknet" marketplace - then quietly seized a second bazaar to amass intelligence on illicit drug merchants and buyers. AlphaBay, formerly the internet's largest darknet site, had already gone offline July 5 with the arrest in Thailand of its alleged creator and administrator. Source
  • 'Blade Runner 2049,' 'Stranger Things' bring VR to Comic-Con

    Tech & Science CTV News
    SAN DIEGO -- Comic-Con visitors are getting more than an early look at anticipated movies and shows. They're going inside them with virtual reality. The studios behind "Blade Runner 2049" and "Stranger Things 2" have created temporary installations in downtown San Diego where fans can soar through the Los Angeles of the future in a Spinner ship from "Blade Runner 2049" or visit the Hawkins, Indiana, house where Will Byers lives in "Stranger Things. Source
  • Researchers in Cambodia find nest of endangered masked finfoot

    Tech & Science CTV News
    PHNOM PENH, Cambodia -- Wildlife researchers in Cambodia have found a breeding location for the masked finfoot, one of the world's most endangered birds, raising hopes of its continuing survival. The New York-based Wildlife Conservation Society said Thursday its scientists, along with conservationists from Cambodia's Environment Ministry and residents along the Memay river in the Kulen Promtep Wildlife Sanctuary, discovered the only confirmed breeding location in Cambodia for the very rare…
  • Vancouver Port to lead study to probe effects of ship noise on killer whales

    Tech & Science CTV News
    VANCOUVER -- A program led by the Vancouver Fraser Port Authority will examine how endangered southern resident killer whales respond to slower vessel speeds and reduced underwater noise in a key summer feeding area off southern British Columbia. Source
  • Cash to protect forests: Pilot program in Uganda finds it works

    Tech & Science CBC News
    As environmentalists debate how best to preserve the world's dwindling forests, a study published on Thursday offered a simple solution: pay land owners in poor countries not to cut down the trees. Deforestation dropped by more than half in Ugandan villages where land owners were paid about $28 per hectare each year if they preserved their trees, according to the study from U.S. Source
  • Musk says government likes plan for high-speed tunnels

    Tech & Science CTV News
    DETROIT -- In a tantalizing Tweet, Elon Musk says he has "verbal government approval" to build a tunnel for high-speed transportation from New York to Washington. The billionaire entrepreneur didn't say who gave him the approval. Source
  • Google Street View finally captures missing Austria

    Tech & Science CTV News
    Google's Street View cars on Thursday started taking images in Austria, the only EU country along with Germany to remain largely absent from the popular online service showing 360-degree pictures of places around the world. Source