![]() ![]() Today, landowners, including the Crown, are responsible for controlling rabbits on their own lands. Myxomatosis was introduced in the early 1950s as a form of pathogenic control but, unlike Australia, it failed to establish through lack of a suitable spreading organism. Very substantial government investments have been made historically to control rabbits through other means: trapping, shooting, poisoning, gassing, burrow-ripping, pathogens and dogs. These natural enemies of rabbits rarely controlled rabbit numbers effectively but they have been disastrous for our native species. Rabbit controlĮarly attempts to control rabbit plagues inflicted on New Zealand one of our worst environmental disasters – the introduction of stoats, ferrets and weasels. Rabbits also threaten ecological values where they browse on vulnerable native plant communities, and where as year-round prey they support the mammalian predators which are contributing to the extinction of many New Zealand native birds and animals. Historically, rabbit-infested farms were abandoned because owners could not make a living. Burrowing and scrapes cause extensive damage on erosion-prone soils, so much so that agricultural land can be rendered useless. Rabbits also provide a stable food source for mammalian carriers of bovine tuberculosis. On average, 7-10 rabbits consume as much as one ewe. They compete very effectively with livestock for pasture. Rabbits are regarded primarily as an agricultural pest. Females are also capable of adjusting litter-sizes to food supply so rabbit populations are capable of rebounding quickly from natural disasters or control pressures. They can produce a total of 20 – 50 young per adult doe. Early-born does may breed in their natal year. Rabbits have a high capacity for reproduction and female rabbits (does) may be pregnant for 70% of a year. Some wild rabbits may live up to seven years but life spans are generally much shorter, with high rates of natural mortality among young animals. By the 1880s rabbits had become a serious threat to the fragile New Zealand economy. Establishment of wild populations was limited at first by lack of suitable habitat but increased pastoral farming assisted spread and growth in numbers. ![]() Facts about rabbitsĭomestic rabbits were commonly carried on sailing ships and sometimes released on islands as food for castaways. Rabbits were still imported as late as the 1860s to stimulate a domestic fur and meat trade. Reduction of populations is on-going and essential for the economic and environmental welfare of New Zealand. They can populate these environments in truly destructive numbers if uncontrolled. Rabbits thrive in dryland and semi-arid environments, especially in New Zealand’s South Island. As herbivores, they are very significant agricultural and ecological pests. After their introduction, European rabbits soon became widely distributed throughout the drier regions of both main islands and on many offshore islands. ![]()
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