News | Environment
16 Dec 2017 1:17
NZCity News
NZCity CalculatorReturn to NZCity

  • Start Page
  • Personalise
  • Days of Xmas
  • Sport
  • Weather
  • 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
     15 Dec: First cars cross reopened Kaikoura highway
     13 Dec: Emmanuel Macron says the world is losing the battle against climate change
     13 Dec: Researcher's doubts on coral reef's future
     12 Dec: Napier Port profit hits record in 2017
     11 Dec: NFL match fought in incredible snow storm sees Buffalo Bills edge Indianapolis Colts in overtime
     11 Dec: Christchurch water restrictions on hold
     11 Dec: Bates fires in Australia as Strikers win
     Top Stories

    RUGBY RUGBY
    Australia bidding for 2027 Rugby World Cup More...


    BUSINESS BUSINESS
    Rupert Murdoch dismisses Fox News sexual harassment allegations as 'largely political' More...



     Today's News

    Business:
    Rupert Murdoch dismisses Fox News sexual harassment allegations as 'largely political' 22:47

    Basketball:
    36ers in comeback NBL win over Breakers 21:57

    Entertainment:
    Nelly has had his alleged rape case dropped after his accuser refused to testify against him 21:30

    Soccer:
    Clean sheet not the A-League goal for Moss 21:17

    Entertainment:
    Robbie Williams spent seven days in intensive care after “abnormalities” were found in his brain in September 21:00

    Entertainment:
    Halle Berry and Alex Da Kid have reportedly ended their relationship 20:30

    Entertainment:
    Selena Gomez has posted a touching tribute to her close pal Taylor Swift in honour of her birthday 20:00

    Politics:
    PNG Supreme Court dismisses warrant for Peter O'Neill's arrest over corruption allegations 19:47

    Entertainment:
    Ed Sheeran has managed two years without a cell phone 19:30

    Living & Travel:
    Hunt on for man missing in Lake Wanaka 19:17


     News Search






    Power Search


    © 2017 New Zealand City Ltd