News | Environment
19 Oct 2017 4:06
NZCity News
NZCity CalculatorReturn to NZCity

  • Start Page
  • Personalise
  • Sport
  • Weather
  • Olympic Games
  • Ski Report
  • Finance
  • Shopping
  • Jobs
  • Horoscopes
  • Lotto Results
  • Photo Gallery
  • Site Gallery
  • TVNow
  • Dating
  • SearchNZ
  • NZSearch
  • Crime.co.nz
  • RugbyLeague
  • Make Home
  • About NZCity
  • Contact NZCity
  • Your Privacy
  • Advertising
  • Login
  • Join for Free

  •   Home > News > Environment

    Captive orca's teeth in poor state: study

    An international study involving New Zealand scientists has found that orca, or killer whales, kept in captivity suffer from painful, damaged teeth.


    The teeth of captive orca, or killer whales, are in a sorry and painful state, an international research team has found.

    The study by the team, which includes New Zealand-based scientists Dr Carolina Loch and Dr Ingrid Visser, has raised concerns over the overall health and welfare of orca in captivity.

    The researchers looked at 29 orca owned by one company and held in the United States and Spain, and they found that every one of them had damaged teeth.

    Two-thirds had moderate to extreme tooth wear in the lower jaw, mostly from chewing concrete and steel tank surfaces.

    Six in 10 had teeth that were so worn they had to be drilled to extract the soft pulp inside, according to the study published in the journal Archives of Oral Biology.

    Dr Loch, from Otago University's dentistry faculty, says that, unlike with humans, the resultant hole is not filled or capped.

    Instead, it is left open, requiring daily flushing with chemicals to keep the teeth empty of food and bacteria.

    Dr Loch added that a drilled tooth was severely weakened and, if any other trauma occurred, fractures would happen.

    Dr Visser, who has studied orca in the wild for more than three decades, said the research offered hard numbers to show how health and welfare were compromised by being confined in tanks.

    "Given how big the root of an orca's tooth is and that orca have a nervous system similar to ours, these injuries must be extremely painful," she said.

    "Compared to free-ranging orca, the teeth of captive orca are incredibly compromised and you just don't see this type or level of damage in the wild."


    NZN




    © 2017 NZN, NZCity


     Other Environment News
     18 Oct: CTV quake site made into 'peaceful place'
     17 Oct: Quake near Lower Hutt delivers sharp jolt
     17 Oct: Dogs maul seal pups on Hawke's Bay beaches
     17 Oct: Garden-Bachop signs Hurricanes deal
     16 Oct: David Attenborough urges global action to reduce plastic in oceans
     16 Oct: Nats, Labour head to Fiji climate talks
     15 Oct: Donald Trump says he 'met with the President of the Virgin Islands' — but that's him
     Top Stories

    RUGBY RUGBY
    NZ Rugby tweaks board selection process More...


    BUSINESS BUSINESS
    Economists call for living wage More...



     Today's News

    Law and Order:
    Donald Trump tells Sergeant La David Johnson's widow: 'He knew what he signed up for' 23:07

    Rugby:
    NZ Rugby tweaks board selection process 21:57

    Entertainment:
    Harry Judd smoked strong skunk cannabis at school 21:33

    Soccer:
    Sydney, Wanderers trade derby barbs 21:17

    Entertainment:
    Harvey Weinstein wants to keep making movies even if it's not with The Weinstein Company 21:03

    Accident and Emergency:
    West Coast fisherman search ends for day 20:37

    Entertainment:
    Michael Fassbender and Alicia Vikander had an environmentally-friendly wedding 20:33

    Entertainment:
    Blac Chyna didn't have Tyga's phone number until they started planning their son's birthday party 20:03

    Entertainment:
    J.K. Rowling has been named the highest-paid European celebrity after earning £71 million 19:33

    Entertainment:
    Marilyn Manson has branded Justin Bieber a "girl" with the "mind of a squirrel" 19:03


     News Search






    Power Search


    © 2017 New Zealand City Ltd