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

 


"Goose steps" needed for knowledge of bird problem

"Goose steps" needed to increase knowledge of bird problem

Scientists say research is needed to clear up “grey areas” on managing a large black and white goose that damages farm pasture and city parks.

The Canada goose was first introduced to New Zealand in 1876 and is expanding its range, particularly in eastern areas of both North and South islands. The goose competes with livestock for crops and pasture; fouls farm paddocks, city parks and sports fields; and increases the risk of bird strike around airports. It can carry diseases including avian influenza, campylobacter, salmonella and E.coli that may infect people and animals including our rare native birds.

The goose’s classification as a game bird is currently under review by the Conservation Minister. At present it can only be hunted under license from Fish & Game. Fish & Game can order culls if hunters fail to control geese to acceptable levels, but local hunters opposed recent attempts to cull birds in Christchurch.

Landcare Research scientists Drs Eric Spurr and Jim Coleman have reviewed goose population trends, damage and control in New Zealand. They say that while goose damage is multifaceted, surprisingly little research has been done on the true economic impacts, and how to manage goose numbers more effectively than at present.

“Currently, the goose population is well above the levels agreed to by farming interests,” Dr Spurr says. “As hunting alone does not keep numbers in check, research will help to refine other methods. Preventing birds breeding, scaring birds, and culling all have advantages and disadvantages – for example scaring may simply shift birds around.

“Also, there is no specific measurement of whether current goose management is actually minimising adverse effects.”

Dr Spurr also says the reasons for variations in the level of goose-related damage are not fully understood.

“We do know there are seasonal changes in goose diet. For example, on a study of 69 hectares of pasture, geese ate an average 90 kilograms of pasture per day in spring, and more than five times that in autumn. Goose impacts may be worse in drought years, and the ability of land to cope with goose numbers varies considerably. This tells us that managing goose populations to a pre-agreed number may not always be the most effective approach.

“Better information on control methods, population trends and of course the cost of goose damage will help enlighten decisions on the goose’s future status and management.”

Spurr, E.B; Coleman, J.D. 2005. Review of Canada goose population trends, damage, and control in New Zealand. Landcare Research Science Series No. 30. Manaaki Whenua Press, Lincoln, New Zealand. 31 pp.

Copies of the report (cost $20.00 each + $5 delivery per order) are available from:
Manaaki Whenua Press, Landcare Research, PO Box 40, Lincoln 8152. A PDF of the report may be downloaded free from:
www.landcareresearch.co.nz/publications/scienceseries/

ENDS

© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Keep Digging: Seabed Ironsands Miner TransTasman Tries Again

The first company to attempt to gain a resource consent to mine ironsands from the ocean floor in New Zealand's Exclusive Economic Zone has lodged a new application containing fresh scientific and other evidence it hopes will persuade regulators after their initial application was turned down in 2014. More>>

Wool Pulled: Duvets Sold As ‘Premium Alpaca’ Mostly Sheep’s Wool

Rotorua business Budge Collection Limited (Budge) and sole director, Sun Dong Kim, were convicted and fined a total of $71,250 in Auckland District Court after each pleading guilty to four charges of misrepresenting how much alpaca fibre was in their duvets. More>>

Reserve Bank: Labour Calls For Monetary Policy To Expand Goals

Labour's comments follow a speech today by RBNZ governor Graeme Wheeler in which Wheeler sought to answer critics who variously say he should stop lowering interest rates, lower them faster, or that inflation-targeting should no longer be the primary goal of the central bank's activities. More>>

ALSO:

BSA Extension And Sunday Morning Ads: Digital Convergence Bill Captures Online Content

Broadcasting Minister Amy Adams has today announced the Government’s plans to update the Broadcasting Act to better reflect today’s converged market... The Government considered four areas as part of its review into content regulation: classification requirements, advertising restrictions, election programming and contestable funding. More>>

ALSO:

March 2017: Commerce Commission Delays Decision On Fairfax-NZME

The Commerce Commission has delayed its decision on the proposed merger between NZME and Fairfax Media's New Zealand assets, saying the deal is complex and it needs more time to assess the impact on both news content and the advertising market. More>>

ALSO:

Plan Plan: Permanent Independent Hearings Panel Proposed For Planning

The Productivity Commission recommends creating a permanent independent hearings panel like the one that cut through local politics to settle Auckland’s Unitary Plan, for the whole country. More>>

ALSO:

Statistics: NZ Jobless Rate Falls To 5.1% Under New Methodology

New Zealand's unemployment rate fell more than expected in the second quarter as Statistics New Zealand adopted a new way of measuring the labour market to bring the country in line with international practices, and while a growing economy continued to support jobs growth. More>>

ALSO:

Get More From Scoop

 
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news