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Conservation of kakerori (Pomarea dimidiata) in the Cook Islands in 2006/07
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Available Online

Robertson Hugh a.

,

Saul. Edward K.

2008
In 1989, the kakerori (Pomarea dimidiata) was one of the 10 rarest birds in the world with a declining population of just 29 individuals living in forested hill country in the Takitumu Conservation Area (TCA) of south-eastern Rarotonga, Cook Islands. Following 12 years of rat poisoning, the population had increased to 255 birds in August 2001. The programme then shifted from ‘species recovery’ to ‘sustainable management’ of the Rarotonga population at 250 to 300 birds. The rat poisoning effort was reduced, and an ‘insurance’ population was established on Atiu. By August 2004, following the reduction of poisoning from weekly to fortnightly, and the transfer of 30 youngsters to Atiu in 2001–03, there were 281 birds on Rarotonga and 25 on Atiu. The southern Cook Islands were hit by five tropical cyclones in a four-week period in February–March 2005, and forests on Rarotonga were severely damaged. Kakerori survived the storms remarkably well, but the main effect was observed in the following breeding season (2005/06), when nesting success on Rarotonga was exceptionally poor. Reduced canopy cover caused nests to be exposed to abnormally wet conditions, and lack of fruit meant that rats were exceptionally hungry. Only 31 yearlings were known to be alive in August 2006—about half the expected number—and annual mortality of banded birds (25%) was the highest since management began. The kakerori population on Rarotonga fell 8% from 275 birds in August 2005 to a minimum of 254 birds in August 2006. The situation was better on Atiu, with the population growing from about 32 adult birds in 2005/06 to a minimum of 37 adult birds in 2006/07, and an Atiu-bred pair nested successfully for the first time. The 2006/07 breeding season on Rarotonga was moderately successful, with a minimum of 51 fledglings found. Because the ‘sustainable management’ regime of fortnightly rat poisoning in the TCA was only just adequate in giving protection to adult kakerori, the annual poisoning programme was modified by adding rounds of ‘interim’ poisoning in April and July 2007 aimed at reducing rat and cat numbers before the breeding season.
19th SPREP Meeting of Officials, 08-11 September 2008, Pohnpei, FSM : Additional Working papers|Review of support staff salary movements : agenda item 6.4|SPREP support staff remuneration review 2008: terms of reference|SPREP market survey of support staff salaries and terms & conditions in Samoa, July 2008|Annual Reference market data review (Professional staff) : agenda item 6.5|Council of Regional Organisations: annual comparison of reference markets 2008 update|Genetic resources in Pacific region: update on discussion paper from SPREP 2007: agenda item 8.4. paper presented by Australia|Regional Institutional Framework (RIF) Review: agenda item 10.3|Forum Communique: Regional Institutional framework review|Regional Institutional Framework: stage 2 task force, Nukualofa Tonga 2007|Regional Institutional framework- stage 2 RIF task force (June) meeting, PIFS, Suva Fiji 14 June 2007: Chairperson's report - meeting outcomes|The pathway towards quality of service from Pacific Regionalism, September 2007 RIF 2 project team : annex 1|38th Pacific Islands forum, Fiji 24-25 October 2006: Forum communique: Regional Institutional framework review|Reforming the Pacific Regional Institutional Framework, August 2006|39th Pacific Islands Forum, Alofi, Niue 19-20 August 2008: Forum communique: Regional Institional Framework Review

Secretariat of the Pacific Regional Environment Programme

2008
19th SPREP Meeting of Officials, 08-11 September 2008, Pohnpei, FSM : Additional Working papers|Review of support staff salary movements : agenda item 6.4|SPREP support staff remuneration review 2008: terms of reference|SPREP market survey of support staff salaries and terms & conditions in Samoa, July 2008|Annual Reference market data review (Professional staff) : agenda item 6.5|Council of Regional Organisations: annual comparison of reference markets 2008 update|Genetic resources in Pacific region: update on discussion paper from SPREP 2007: agenda item 8.4. paper presented by Australia|Regional Institutional Framework (RIF) Review: agenda item 10.3|Forum Communique: Regional Institutional framework review|Regional Institutional Framework: stage 2 task force, Nukualofa Tonga 2007|Regional Institutional framework- stage 2 RIF task force (June) meeting, PIFS, Suva Fiji 14 June 2007: Chairperson's report - meeting outcomes|The pathway towards quality of service from Pacific Regionalism, September 2007 RIF 2 project team : annex 1|38th Pacific Islands forum, Fiji 24-25 October 2006: Forum communique: Regional Institutional framework review|Reforming the Pacific Regional Institutional Framework, August 2006|39th Pacific Islands Forum, Alofi, Niue 19-20 August 2008: Forum