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To enhance their conservation value, several hundred islands worldwide have been cleared of invasive alien rats, Rattus spp. One of the largest projects yet undertaken was on 43 km2 Henderson Island in the Pitcairn group, South Pacific, in August 2011. Following massive immediate mortality, a single R. exulans was observed in March 2012 and, subsequently, rat numbers have recovered. The survivors show no sign of resistance to the toxicant used, brodifacoum. Using pre and post-operation rat tissue samples from Henderson, plus samples from around the Pacific, we exclude re-introduction as the source of continued rat presence. Microsatellite analysis of 18 loci enabled comparison of genetic diversity of Henderson rats before and after the bait drop. The fall in diversity measured by allele frequency change indicated that the bottleneck through which the breeding population passed was probably around 50 individuals, representing a census population of about 60-80 animals. This is the first failed project that has estimated how close it was to success.

A Global Environment Facility (GEF) funded project is currently being implemented in the Republic of the Marshall Islands (RMI) titled the “Prevention, Control and Management of Invasive Alien Species in the Pacific Islands”. This is a multicountry project and includes Niue, Federated States of Micronesia, Cook Islands, Papua New Guinea, Palau, Kiribati, Tonga, Samoa and Vanuatu. Activities within the framework of this project include the conservation of priority species and ecosystems and the management of invasive alien species (IAS). Please see Table 1 below for list of key deliverables identified by the Government of RMI.

A Global Environment Facility (GEF) funded project is currently being implemented in the Federated States of Micronesia (FSM) titled the “Prevention, Control and Management of Invasive Alien Species in the Pacific Islands”. This is a multicountry project and includes the Niue, Cook Islands, Marshall Islands, Papua New Guinea, Palau, Tonga, Kiribati, Samoa and Vanuatu. Activities within the framework of this project include the conservation of priority species and ecosystems and the management of invasive alien species. Please see Table 1 below for list of key deliverables identified by the Government of the FSM

A Global Environment Facility (GEF) funded project is currently being implemented in the Cook Islands titled the “Prevention, Control and Management of Invasive Alien Species in the Pacific Islands”. This is a multicountry project and includes the Niue, Federated States of Micronesia, Kiribati, Marshall Islands, Papua New Guinea, Palau, Tonga, and Samoa. Activities within the framework of this project include the conservation of priority species and ecosystems and the management of Invasive Alien Species (IAS).

A Global Environment Facility (GEF) funded project is currently being implemented in Kiribati titled the "Prevention, Control and Management of Invasive Alien Species in the Pacific Islands". This is a multicountry project and includes the Niue, Federated States of Micronesia, Cook Islands, Marshall Islands, Papua New Guinea, Palau Tonga and Samoa. Activities within the framework of this project include the conservation of priority species and ecosystems and the management of invasive alien species. Please see Table 1 below for list of key deliverables identified by the Government of Kiribati.

A Global Environment Facility (GEF) funded project is currently being implemented in Niue titled the “Prevention, Control and Management of Invasive Alien Species in the Pacific Islands”. This is a multicountry project and includes the Cook Islands, Federated States of Micronesia, Kiribati, Marshall Islands, Niue, Papua New Guinea, Palau, Tonga, and Samoa. Activities within the framework of this project include the conservation of priority species and ecosystems and the management of Invasive Alien Species (IAS).

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