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Enderby Island cattle : ウィキペディア英語版
Enderby Island cattle
Enderby Island Cattle are a breed of cattle that existed in a wild state in isolation on Enderby Island, New Zealand for over 80 years. Only about seven specimens remain today, (on mainland New Zealand), after a rescue expedition by the Rare Breeds Conservation Society of New Zealand (RBCSNZ), and a culling program to protect the native flora and fauna of Enderby Island. There have since been intensive efforts at breeding the cattle, involving both in vitro fertilisation and cloning, and there is an ongoing program to perpetuate the breed in captivity.〔Backus, Laura. (2006). Enderby Island Cattle: A Breeding Strategy for Genetic Conservation. (Colorado State University paper)() PDF downloaded 4 January 2008〕
==History==
Nine cattle (the exact breed remains obscure) were introduced to Enderby Island, the northernmost of the subantarctic Auckland Islands group, in the 1890s when an attempt was made to establish farming on the island. The attempt failed because of the climate, with the island being abandoned in 1910 and the cattle left behind. Over the 80 years of subsequent isolation the cattle survived well despite the harsh climate, feeding on Enderby's scrub vegetation, Southern Rata, and seaweed, evolving to cope with the environment.〔 Cattle had been released earlier, also, in an effort to provide food for castaways.
In 1991 New Zealand's Department of Conservation decided that species introduced to the Auckland Islands, including cattle and rabbits, should be culled in the course of a program to restore the natural ecosystem. An expedition that year eradicated 47 of an estimated 53 cattle on the island. Genetic material (oocytes and epididymal sperm) was taken and stored. A 1992 expedition by the RBCSNZ, to rescue live specimens of the Enderby Island Rabbit, found tracks of two remaining cattle, a cow and her calf, which were later captured and transferred to New Zealand.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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