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Tags / Keywords ias-management piln management action eradication american-mink scotland
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On the verge of a biological crisis: the state of invasive species in the Pacific

Island and Ocean Ecosystems, BRB

Available Online

Cas Vanderwoude

A report prepared by the Invasive Partnership for the Pacific Islands Forum Leaders Meeting, Palau July 2014 as requested by the Micronesian Chief Executives in Resolution 19-01

Did you know - Ship Rats

Available Online

National Environment Service Tuanga Tapooporo Cook Islands

Ship rats (rattus rattus) is the only species of rat not found on Atiu.

Feasibility Assessment for the Removal of Pacific Rats (Rattus exulans) from Late Island. Reports 1 & 2

Bonham, J.

Griffiths, R.

Island Conservation

A Breath of Fresh Air

Island and Ocean Ecosystems, BRB

Foreign and Commonwealth Office

Rat Destruction in Pacific Islands

Island and Ocean Ecosystems, BRB

Wilson, E.J.

Tuvalu national biodiversity strategy and action plan: fifth national report to the convention on biological diversity.

Available Online

Alefaio, S

Falega, E

Penivao, F

Saitala, M

Teakau, F

Tekenene, M

Thaman, R

The isolated, small, low-lying resource-poor atolls of Tuvalu are clearly on the frontline against climate change, the escalating impacts natural disasters and declining food, health and energy security.

Predator-Free Rakiura. An economic appraisal.

Available Online

Morgan, Gareth

Simmons, Geoff

This report estimates the benefits of making Rakiura and surrounding islands predator free. The proposal is to do this in two phases, starting with the Halfmoon Bay area (denoted in this report as HMB) before progressing to the rest of the island (denoted in this report as full).

The Ecology of Rodents in the Tonga Islands

Available Online

Twibell, John

The influence on crop damage of Rattus norvegicus, Rattus rattus, and the native Polynesian rat, Rattus exulans, was studied during the establishment of a rat control program for the Tongan Department of Agriculture in 1969. This was the first long-term study of Tongan rodents. Previous scientific literature on Tongan mammals is very sparse. The Kingdom of Tonga, or Friendly Islands, consists of approximately 150 small islands with a combined area of about 256 square miles at lat 21 0 S. The majority of these islands are composed of raised coral limestone ; however, there is a row of six volcanic islands on Tonga's western border. Tongatapu, the location of the government center, is the largest and most important island. The Ha'apai island group lies 80 miles north of Tongatapu, and 150 miles north is the Vava'u group. Fiji is 420 nautical miles east and Samoa is 480 miles north. The climate is tropical and is influenced seasonally by trade winds. Since Captain Cook's first visit in 1773, Western civilization has brought trade, missionaries, and perhaps rats to Tonga. With this shipping came numerous introduced plants and animals. The arrival dates for the common rat, Rattus norvegicus, and the "European" roof rat, Rattus rattus, are not known, but are believed to be more recent, probably since the increase of regular shipping trade and the construction of wharves. Presently rodents account for approximately 20 percent of the agricultural losses and $50,000 worth of economic loss each year (Twibell, unpublished). This is a conservative estimate based on damage counts and observation. In some areas rats destroy or damage up to 50 percent of the coconuts, which represent the main economic crop in Tonga. THE INFLUENCE on crop damage of Rattus norvegicus, Rattus rattus, and the native Polynesian rat, Rattus exulans, was studied during the establishment of a rat control program for the Tongan Department of Agriculture in 1969. This was the first long-term study of Tongan rodents. Previous scientific literature on Tongan mammals is very sparse. The Kingdom of Tonga, or Friendly Islands, consists of approximately 150 small islands with a combined area of about 256 square miles at lat 21 0 S. The majority of these islands are composed of raised coral limestone ; however, there is a row of six volcanic islands on Tonga's western border. Tongatapu, the location of the government center, is the largest and most important island. The Ha'apai island group lies 80 miles north of Tongatapu, and 150 miles north is the Vava'u group. Fiji is 420 nautical miles east and Samoa is 480 miles north. The climate is tropical and is influenced seasonally by trade winds. Since Captain Cook's first visit in 1773, Western civilization has brought trade, missionaries, and perhaps rats to Tonga. With this shipping came numerous introduced plants and animals. The arrival dates for the common rat, Rattus norvegicus, and the "European" roof rat, Rattus rattus, are not known, but are believed to be more recent, probably since the increase of regular shipping trade and the construction of wharves. Presently rodents account for approximately 20 percent of the agricultural losses and $50,000 worth of economic loss each year (Twibell, unpublished). This is a conservative estimate based on damage counts and observation. In some areas rats destroy or damage up to 50 percent of the coconuts, which represent the main economic crop in Tonga.

Wetlands of Wallis and Futuna.

Island and Ocean Ecosystems, BRB

Available Online

Secretariat of the Pacific Regional Environment Programme.

In 2014, with support from the French Government, Wallis and Futuna informed SPREP of its intention to identify nationally significant wetlands for future designation as wetlands of international importance (Ramsar Sites) under the Convention on Wetlands (Ramsar, Iran, 1971).

Large scale eradication of non-native invasive American mink (Neovison vison) from Outer Hebrides of Scotland

Island and Ocean Ecosystems

Available Online

Maclennan, D.

Macleod, I.A.

Raynor, R.

Thompson, D.B.A.

Whitaker, S.

The Hebridean Mink Project was tasked with eradicating American mink (Neovison vison) from the Outer Hebrides, an extensive, complex island archipelago, amounting to 3,050 km2. Hundreds of islands contribute to a coastline of approximately 2,500 km, 15% of Scotlands total. The geographical complexity continues inland with over 7,500 freshwater lochs, ~24% of Scotlands total, which enables invasive American mink, in suitable habitats, to reach densities seldom encountered elsewhere. With major funding from the EU LIFE programme, removal from the Uists began in 2001. By 2006 eradication was declared there, as no captures had occurred for 16 months. In 2007 the project extended into Harris and Lewis, adopting a systematic network of live capture traps (7,039 spaced at 450500 m intervals utilising prominent features of the riparian network and coastline). The traps were checked in rotation until at least a 95% reduction in population had been achieved. An incremental, strategic change from systematic trapping to detection; by means of footprint monitoring, cameras and dog searching, followed by responsive trapping then occurred from 2011 onwards. By 2013 a lethal monitoring system utilising kill traps was employed alongside remote alert systems which allowed the project to remove the remaining population of mink from Lewis and Harris, with a reduced sta? resource, and increase the trap night total to in excess of 500,000. To date, 2,198 mink have been caught, but only two non-breeding females and associated males have been caught in Lewis and Harris in the last 18 months (no juveniles captured). The challenges of geographical scale, terrain, climatic conditions and a continuously reducing sta? complement have required an adaptive management approach to achieve the project goal of a mink-free Outer Hebrides that bene?ts ground nesting birds and migratory ?sheries. This is viewed as a highly e?ective eradication project, and lessons learnt can be put into place for other ambitious control programmes.

ias-management piln management action eradication american-mink scotland

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