此物种详细信息 Santa Catalina Is.
来源： Schuyler et al. 2002.
Feral pigs were introduced to Santa Catalina Island from nearby Santa Rosa Island, either for sport hunting or to control the rattlesnake population. Before 1955, a syndactyl type of pig was introduced, although few pigs with this characteristic are still sighted. In 1980, the feral pig population was estimated to be between 1260 and 2040 individuals, with the highest densities in moist canyon bottoms.
Control of feral pigs was initiated on Santa Catalina Island in 1990, occurring in four phases. Phase 1 targeted the western end of the island. An existing bison fence was made pig-proof to cut the western end off from the rest of the island. The techniques used in phase 1 included trapping, ground hunting with and without dogs, and aerial hunting by helicopter. Some sport hunting and poaching also occurred. A ten month break occurred before phase 2 commenced, due in part to financial constraints. Phase 2 included the whole of the island, and used the same techniques, although more traps were used and spotlighting was introduced. Phase 3 began in 1996, and aimed to eradicate pigs from the western end. This was achieved in 18 months. Phase 4 aims to eradicate pigs from the entire island. It started in July 1998, and used the same techniques again, with the exception of no aerial hunting. Four zones were created, to be systematically cleared of pigs, divided by a pig-proof fence. Prior to phase 4, a series of public community forums were held to address concerns and answer questions for the local residents. By 2001, at least 11,855 pigs had been killed, and between 247 and 300 remained. Eradication is expected to be complete by no earlier than 2004.
Santa Catalina Island (194 km²) lies 32 km south of Point Vincentes, Los Angeles, California. It is home to a number of endemic terrestrial mammals, as well as birds, reptiles, amphibians and 472 native plant species.
最后修改 ： 11/03/2005 12:02:04 p.m.