New Zealand has a very large number of threatened and endangered species. The resources available to tackle the challenges of managing biodiversity are limited. The efforts applied, have to date proved insufficient to ...

New Zealand has several systems in place to prevent entry, eradicate, contain, provide surveillance of weeds. The success of those efforts is far less than some of us hope for and the numbers of naturalised weedy plants, ...

We welcome a reply by Innes et al. (2012) to our article (Scofield et al. 2011) questioning the contribution of ‘predator-proof’ fences. We note that Innes et al. do not question the fundamental points of our thesis: (1) ...

A review of pest-exclusion fences throughout New Zealand shows that the goals of fence projects are frequently not achieved and cost-benefit analyses often do not adequately quantify ongoing costs. The creation of these ...

Possums, a native of Australia, were first liberated in New Zealand in 1858 to provide a source of fur. Today they number about 70 million and few parts of the country have not been invaded by possums. Possums have well ...

Conservation requires hard choices.‘We cannot preserve everything ... The laws of economics apply todiversity’ Weitzman 1992.Failure to use economic analyses will result in less conservationgains than are potentially ...

Although an estimated US$6 billion is invested annually in our planet's biological diversity, little research has been conducted on which conservation treatments work best or provide best value for money. Conserving ...

The eighth survey (the series having begun in 2000) of people’s perceptions of the state of the New Zealand environment was undertaken over February–March 2016. The survey is based on the Pressure-State-Response (PSR) model ...