Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search

 


More young Maud Island frogs pop up in Zealandia

More young Maud Island frogs pop up in Zealandia

A Victoria University postgraduate student studying Maud Island frogs in the Zealandia eco-sanctuary has made an interesting discovery.

In 2006, Zealandia staff translocated 60 frogs to the sanctuary, placing 31 into purpose-built enclosures and releasing 29 into the open. None of the 29 had been sighted for some years, and conservation staff thought it possible resident kiwi and mice may have got the better of them.

However Tanya Karst, a postgraduate student from Victoria’s Centre for Biodiversity and Restoration Ecology who recently started her field study on the threatened nocturnal Maud Island frog (Leiopelma pakeka), was excited to find this wasn’t the case.

“We were really pleased to find a subadult frog under rocks outside the main pen. It was almost three years old, so had survived for some time, despite the presence of potential predators,” she said.
Zealandia’s Conservation Manager Raewyn Empson was happy to hear of the find.

“Finding the frog outside the enclosure was great. It confirmed that at least a pair of frogs survived and bred there after release, and at least one juvenile has survived to three years of age - there were concerns that all had disappeared despite the fact that they are cryptic. There could be more.”

Karst’s study is on mortality mitigation of this rare New Zealand frog in Zealandia and aims to assess the likely threats on Maud Island frogs within the sanctuary, particularly the impact of little spotted kiwi and house mice.

“A fence around the frog habitat (15m x 12.5m) excludes kiwi from the site, and more rocks and logs have been added to improve the habitat. Movements and numbers of mice will be carefully monitored within the area the frogs occupy,” she said.

On Sunday, the Zealandia frog population was supplemented with 100 additional frogs from Maud Island to enhance their survival prospects.

Dr Ben Bell of Victoria University supervises Karst’s project.

“The frogs are known to have bred in Zealandia for six successive years, so clearly the conditions there are suitable for breeding them.

“Tanya Karst’s study will further document the growth and survival of these frogs, providing important information on the rearing success of young, as well as on the survival of adults,” he said.

[ENDS]

EXTRA INFORMATION:

What’s special about New Zealand’s frogs?
Nicola Toki explains it nicely:
http://www.stuff.co.nz/national/blogs/in-our-nature/7787401/Our-fascinating-frogs
Our frogs don't croak, don't have an eardrum, have large round pupils in their eyes, and don't have an aquatic tadpole stage to their life cycle!”

How can you tell how old a Maud Island frog is?
Nutritional intake has an effect on growth but in general, if the diet is healthy, during the growth phase you can determine age from snout-vent length. After it's reached adult size, unless you've tracked its growth, you cannot tell its age.

Mice at Zealandia
Mice have been present at Zealandia in low numbers since shortly after the 2000 eradication. Numbers are kept down with yearly control work. For more information on pest eradication see: http://www.visitzealandia.com/what-is-zealandia/conservation-restoration/pest-eradication/

© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Power Outages, Roads Close: Easter Storm Moving Down Country

The NZ Transport Agency says storm conditions at the start of the Easter break are making driving hazardous in Auckland and Northland and it advises people extreme care is needed on the regions’ state highways and roads... More>>

ALSO:

Houses (& Tobacco) Lead Inflation: CPI Up 0.3% In March Quarter

The consumers price index (CPI) rose 0.3 percent in the March 2014 quarter, Statistics New Zealand said today. Higher tobacco and housing prices were partly countered by seasonally cheaper international air fares, vegetables, and package holidays. More>>

ALSO:

Notoriously Reliable Predictions: Budget To Show Rise In Full-Time Income To 2018: English

This year’s Budget will forecast wage increases through to 2018 amounting to a $10,500 a year increase in average full time earnings over six years to $62,200 a year, says Finance Minister Bill English in a speech urging voters not to “put all of this at risk” by changing the government. More>>

ALSO:

Prices Up, Volume Down: March NZ House Sales Drop 10% As Loan Curbs Bite

New Zealand house sales dropped 10 percent in March from a year earlier as the Reserve Bank’s restrictions on low-equity mortgages continue to weigh on sales of cheaper property. More>>

ALSO:

Scoop Business: Chorus To Appeal Copper Pricing Judgment

Chorus will appeal a High Court ruling upholding the Commerce Commission’s determination setting the regulated prices on the telecommunications network operator’s copper lines. More>>

ALSO:

Earlier:

Cars: Precautionary Recalls Announced For Toyota Vehicles

Toyota advises that a number of its New Zealand vehicles are affected by a series of precautionary global recalls. Toyota New Zealand General Manager Customer Services Spencer Morris stressed that the recalls are precautionary. More>>

ALSO:

'Gardening Club': Air Freight Cartel Nets Almost $12 Million In Penalties

The High Court in Auckland has today ordered Swiss company Kuehne + Nagel International AG to pay a penalty of $3.1 million plus costs for breaches of the Commerce Act. Kuehne + Nagel’s penalty brings the total penalties ordered in this case to $11.95 million ... More>>

ALSO:

Crown Accounts: Revenue Below Projections

Core Crown tax revenue has increased by $1.9 billion (or 5.0%) compared to the same time last year. However this was $1.1 billion less than expected and is reflected across most tax types, continuing the pattern of recent months. More>>

ALSO:

Get More From Scoop

 
 
Computer Power Plus
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news