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Abstract
Extract
The Polynesian migrations included the rat and the dog. There is no historical link to connect the two endemic New Zealand species of bats with any migration. With these exceptions there were no mammals introduced into New Zealand until early in the 19th century. Today the WHO yearbook records the cattle and. sheep population as 8.9 and 59.9 million, respectively; 40.3% of total export income is derived from meat and by-products. Total export income from meat, wool, dairy produce, livestock on the hoof and horses exceeds 80%. All are the harvest from the medium energy, high protein crop — pasture.