Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search


Zoo tuatara release boosts rare population

Media release

12 February 2008

Zoo tuatara release boosts rare Cuvier Island population

Two young Northern tuatara of Cuvier Island origin, bred at Auckland Zoo, are today being released back to their ancestral home to help boost this rare population - estimated to be fewer than 30 animals.

The two four-year olds bring to 20 - two-thirds of the total known island population - the zoo has now bred and released onto Cuvier Island since receiving six Cuvier adults from the Department of Conservation (DOC) in 1990. The last release from the zoo (11 animals) was in 2003.

DOC relocated the six adults to the zoo to begin a pest eradication programme on this Hauraki area island, which by 1993 was successfully cleared of the Kiore (Pacific rat) The zoo is the only captive facility in New Zealand breeding Cuvier-origin tuatara as part of DOC’s ‘Headstart’ tuatara breeding recovery programme.

A further 14 zoo-bred young are expected to be relocated to Cuvier Island this spring, provided they reach the required 80grams – the size at which they can adequately defend themselves from natural predators, including adult tuatara. In addition, four tuatara eggs from a clutch laid last December at the zoo, are currently incubating at Victoria University, and are expected to hatch between April and June. Another key partner in the recovery programme, Victoria University’s role in incubating the eggs is enabling it to carry out important research into the influence of temperature on tuatara sex, as well as the effects of global warming.

“There’s nothing fast about a breeding recovery programme with tuatara. It’s the classic ‘good things take time’ with this dinosaur-age species, so every successful birth is really important,” says Auckland Zoo NZ fauna team leader, Andrew Nelson.

“It’s incredibly satisfying to see our adults successfully laying clutches, to rear the resulting young for close to 48 months, and then be able to release fit and healthy animals back onto Cuvier to contribute to the recovery of this Northern tuatara sub-species,” says Mr Nelson.

DOC ranger for the Hauraki Area islands, Rob Chappell, says while DOC could only find a total of six tuatara in 1990 (just prior to the eradication programme), they have since found another seven adults.

“It’s possible there could be up to 30 by now, but they’re extremely difficult to find,” says Mr Chappell, who has worked on the rugged 196ha island since 1972.

“While tuatara reach sexual maturity around 14 years, they’re in no hurry, and can potentially still wait years before deciding to breed. I’m not expecting to see a massive population increase in my life-time! But the great thing about Cuvier is it’s safe – totally pest-free. We know this from the flourishing wildlife we’re now seeing - from moko and shore skinks and Pacific and common geckos, to the return of seabirds such as red-billed gulls, white-fronted terns, fluttering shearwaters and diving petrels that are now confident of nesting back on the island,” says Mr Chappell.

Overall since 1995, Auckland Zoo has released a total of 50 tuatara (Red Mercury Island, Cuvier Island, and Stanley Island) onto their respective islands.



• Found only in New Zealand, the rare tuatara is the only surviving member of the order sphenodontia, a lineage that stretches back to the dinosaur age some 225 million years ago – the beginning of the ‘Age of Reptiles’.

• Once living throughout the mainland of New Zealand, tuatara are now found only on 37 off-shore islands. Total tuatara population on all these islands is estimated to be between 50,000 and 100,000.

o The two recognised tuatara species are Brothers Island (Sphenodon guntheri) and Common tuatara (Sphenodon punctatus) - comprising Cook Strait and Northern tuatara. The Northern tuatara is found from the Poor Knights group in the North to Moutohora Island in the Bay of Plenty. Tuatara from Cuvier Island, like other island populations Auckland Zoo is working with (i.e. Stanley & Red Mercury islands) are bred separately, as it is thought they could be genetically distinct (though research has yet to confirm this).
• The word tuatara means “spiny back” in Maori

• A tuatara differentiates itself from other lizards: Its skull has extra holes; it has a pineal eye covered by opaque scales; no ear holes (though hears very well); and has serrated jaw bones which work as teeth.

• Longevity: No one knows for certain how long tuatara can live. The oldest recorded tuatara is Henry (Southland Museum), born in the 1880s.

• Cuvier Island, once part of the mainland, became an island about 12,000 years ago as sea levels rose around a coastal mountain, trapping the remnants of its mainland fauna and flora.

• In 1879 Cuvier Island was made a lighthouse station. Farm animals, including goats, were introduced as food for the lighthouse keepers, and cats escaped and became wild. By the later 1950s, the forest had been reduced to open parkland and there were few sea birds. Saddleback, red-crowned kakariki, pied tit, tui and milktrees were extinct on the island and the tuatara population was reduced to seven known animals. In 1957, over half of the island was designated a nature reserve.


© Scoop Media

Parliament Headlines | Politics Headlines | Regional Headlines

There Is A Field: Reimagining Biodiversity In Aotearoa

We are in a moment of existential peril, with interconnected climate and biodiversity crises converging on a global scale to drive most life on Earth to the brink of extinction. However, our current worldview and political paradigm renders us incapable of responding adequately due to its disconnected and divisive default settings.

These massive challenges can, however, be reframed as a once in a lifetime opportunity to fundamentally change how humanity relates to nature and to each other. Read on The Dig>>

The Dig: Scoop’s Engaged Journalism Platform Launches
The Scoop Ecosystem has grown bigger with the launch of The Dig - a new public interest, in-depth, Engaged Journalism platform. More>>


Unscoped Or Missed Damage: Resolution For Canterbury Owners Of On-Sold Homes

People with over-cap on-sold* properties in Canterbury can now apply for a Government payment so they can get on and repair their homes. More>>


Hamilton-Auckland: First Urban Growth Partnership Signed

New Zealand’s first urban growth partnership between the Government, local councils and mana whenua was signed at a meeting of mayors, chairs and ministers in Hampton Downs today. More>>


Vote On Action Next Week: Secondary Principals Walk From Negotiations

“Unfortunately we consider there is no further value in continuing negotiations at this point. The government has not been able to table an offer that will be acceptable to our members.” More>>

Patrol Car Stolen, Glocks Taken: Manhunt In Gore

The driver rammed the patrol car before fleeing on foot with Police chasing, also on foot. The man has then circled back around, stolen the patrol vehicle, which had the keys left in it, and rammed another Police car... Two Police-issued Glock pistols were stolen. More>>


"Shocking And Dangerous": Accused Mosque Shooter's Prison Letter Posted Online

The man accused of the Christchurch mosque attacks has sent seven letters from prison and had two others withheld, Corrections Minister Kelvin Davis says. Corrections has now blocked the accused gunman from sending or receiving mail... More>>


Standing On List Only: Paula Bennett To Run National’s Election Campaign

The National Party is pleased to announce the appointment of Paula Bennett as our Campaign Chair for the 2020 General Election, President Peter Goodfellow says. More>>

Waiver For State Care Inquiry: Historic Abuse Survivors 'Can Speak Freely'

Abuse in state care survivors can take part in the forthcoming Royal Commission proceedings without being bound by any confidentiality obligations to Crown agencies under their historic claim settlements, Minister of State Services Chris Hipkins said. More>>


Trail Trial: Sexual Violence Court Reduces Lead-Up Times And Trauma

An evaluation of New Zealand’s first sexual violence court has confirmed that the approach taken in the judge-led pilot considerably reduces the time that cases take to reach trial. More>>




InfoPages News Channels