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Think of a challengeing conservation problem you have encounteres - protecting a rare species, winning support for legislation, cleaning up a river, or sustainably managing a forest.|Presentation given in the 3rd Vertebrate Pest Conference, Preceedings collect of Conference includes this wich speaks of broad impacts of rats on Eniwetok Atoll in the Marshall Islands.

About 150feral goat herds occupy about 16% of New Zealand. They are pests because of their effects on indigenous biota. Since 1936, government agencies have attempted to eradicate or control many herds. Common flaws in control campaigns include confusing ends (protection of resources) with means (killing goats), no measures of effectiveness, and lack of sustained action where eradication is impossible. One of four strategic options may be adopted: no action--giving a stable but undesirable outcome; eradication-- giving a stable and desirable outcome; annual sustained control-- giving a stable and desirable outcome but only if inherently fickle government effort is sustained; and occasional sustained control--giving unstable outcomes with or without the desired results depending on the goals and hunting frequency. Control tactics used are hunting on foot with or without dogs, hunting from helicopters, poisoning natural foliage, and fencing.