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

 

ICT Innovation: Six NZ Finalists In World Summit Awards

The awards are a global showcase of 40 projects, across eight categories, with a special emphasis on those which show the benefits of information and communication technology for the development of communities. New Zealand has finalists in six of the eight categories. More>>

ALSO:

Final Frontier: Rocket Lab And NASA Sign Commercial Space Launch Agreement

Rocket Lab has signed a Commercial Space Launch Act Agreement with the National Aeronautics and Space Administration (NASA). The agreement enables Rocket Lab to use NASA resources - including personnel, facilities and equipment - for launch and reentry efforts. More>>

ALSO:

Scoop Business: Wheeler Downplays Scope For ‘Large’ Rates Fall

Reserve Bank governor Graeme Wheeler says some market commentators are predicting further declines in interest rates that would only make sense for an economy in recession, although some easing is likely to be needed to maintain New Zealand’s economic growth. More>>

ALSO:

Ruataniwha Dam: Consent Conditions Could Mean Reduced Intensity

Legal advice sought by the Hawke’s Bay Regional Council on the Ruataniwha Dam consent conditions has confirmed that farmers who sign up to take water from the dam could be required to reduce the intensity of their farming operation to meet the catchment’s strict nitrogen limit. More>>

Health And Safety: Bill Now Sees Rules Relaxed For Small Businesses

Health and safety law reform sparked by the Pike River coalmine disaster has been reported back from the industrial relations select committee with weakened requirements on small businesses to appoint health and safety representatives and committees. More>>

ALSO:

Bearing Fruit: Annual Fruit Exports Hit $2 Billion For First Time

The value of fruit exported rose 20 percent (up $330 million) for the June 2015 year when compared with the year ended June 2014. Both higher prices and a greater quantity of exports (up 9.0 percent) contributed to the overall rise. More>>

ALSO:

Get More From Scoop

 
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news