來源： Kessler, C.C., 2002.
Feral goats (Capra hircus) and pigs are believed to have been on Sarigan Island since at least 1952. They appeared to be changing Sarigan Island from a tropical forest to a grassland habitat. Feral goats had an estimated density of 1.83 individuals per hectare.
Populations of goats (Capra hircus) were sporadically harvested until the 1970s. Between 1995 and 1997, the Commonwealth of the Northern Mariana Islands Division of Fish and Wildlife (CNMI-DFW) formulated a five-phase plan to eradicate pigs and goats, consisting of: survey, base camp establishment, shooting programme, removal of remnant individuals, and follow-up monitoring. Shooting was initially done by helicopter, and followed up by ground hunts. 904 goats were removed in the first 60 days, with a further six removed in follow-up trips. Dogs were used to help in the final stages. The goats' habit of staying in a home range, and feeding in open areas made them vulnerable to the operational methods. The goats could detect the loud noises made by radios used for communication and would flee. Since eradication, the total number of plant species has increased from seven to 25, and numbers of blue-tailed skink (Emoia caeruleocauda) and Slevin's skink (Emoia slevini) have greatly increased.
Sarigan Island (approximately 500 ha) is an uninhabited island 121 miles north of Saipan in the Commonwealth of the Northern Mariana Islands.
最後修改 ： 11/05/2005 3:55:09 p.m.