此物种详细信息 Santa Cruz Is. (US)
来源： Roemer, Donlan and Courchamp 2002, Sterner and Barrett 1991, Van Vuren 1984, in Wolf and Conover 2003
Santa Cruz Island (California) has been subjected to the impacts of feral pigs and sheep since the 1850s (Sterner and Barrett 1991, in Wolf and Conover 2003). On Santa Cruz Island acorns and new growth of grasses and forbs dominated the diet of feral pigs (Van Vuren 1984, in Wolf and Conover 2003).
In 1987 the Nature Conservancy began a program designed to eradicate pigs from the island. Trapping was the most effective way to remove pigs but pigs that were trap shy needed to be removed by other means - hunters with dogs (Sterner and Barrett 1991, in Wolf and Conover 2003).
The milder weather of fall and late winter causes pigs to be more active in the morning and evening, while the short cool and often rainy days of winter causes midday activity. Nocturnal activity was most often observed when conditions were warm and dry (Van Vuren 1984, in Wolf and Conover 2003).
Santa Cruz Island is a 25 000 hectare island with a Mediterranean type climate (Van Vuren 1984, in Wolf and Conover 2003).
最后修改 ： 24/07/2006 3:28:49 p.m.