来源： Madeiros, 2003 in Varnham, 2006
到达日期： 1613; 1612 or before
Black rats, Rattus rattus are found throughout main islands (Madeiros, 2003 in Varnham, 2006) in a wide variety of terrestrial habitats, including buildings (Bermuda Natural History Museum, undated in Varnham, 2006). They were most probably introduced via sailing ships in 17th century (Anderson et al., 2001 in Varnham, 2006).
There is concern that they could colonise offshore islands. Eradicated from Nonsuch Island in the 1960's. Quarantine measures are in place to prevent reintroduction to Nonsuch and introduction to Castle Harbour islands. It is recommended to continue quarantine measures on offshore islands (Madeiros, 2003 in Varnham, 2006).
与其它入侵物种相互作用: Black rats, Rattus rattus assist in the spread of the invasive Chinese fan palm (Livistonia chinensis).
威胁濒危物种: Black rats, Rattus rattus are known to preferentially eat seeds of the 'Endangered (EN) Bermuda palmetto, (see Sabal bermudana in IUCN Red List of Threatened Species).
R. rattus are thought to predate on the 'Critically Endangered (CR)' endemic Bermuda skink (see Eumeces longirostris in IUCN Red List of Threatened Species) also found on offshore islands.(Anderson et al., 2001 in Varnham, 2006).
They are likely to also predate wide variety of other species including endemic invertebrates (25 of which are 'Critically Endangered (CR)' (Glasspool, 2003 in Varnham, 2006). Black rats are also likely to predate Audubon's shearwaters (Puffinus lherminieri), the 'Endangered (EN)' blacked-capped petrels (see Pterodroma hasitata in IUCN Red List of Threatened Species); the 'Endangered (EN) Cahow petrels (see Pterodroma cahow in IUCN Red List of Threatened Species) if it reached their nesting islands (strongly implicated in their decline on mainland, and known to predate similar burrow nesting seabirds) (in Atkinson, 1985 in Varnham, 2006).
最后修改 ： 17/06/2008 9:57:30 a.m.