They have a very extensive website and specifically mention Biodiversity a lot. This is partly to be expected, as New Zealand is a lot more like larger countries as far as politics and other activities go, but the rate at which species are going extinct is quite dramatic. Laws protecting endangered ecosystems The Biosecurity Act of 1993 tries to reduce the harm that exotics do. The Environment Act of 1996 gets people involved, tries to manage the environment better, and looks at the impact of activities. There is a very large Resource Management Act that is a good reference.
Fish catch is controlled on the basis of individual transferable quotas.
The most important export species are orange roughy, hoki and snapper. Tourism is being carefully managed to protect the environment. Total tourists were 1,441,838 for 1996, percentage of that ecotourists is unknown. Not much that I could find. Hunting Hunting is not a major problem that is being addressed.