BioGecko Issue 1 (July 2012)

Bell, Trent, Wilson, Craig & Herbert, Sarah 2012. Determining a conservation threat classification for the Nevis skink, Oligosoma toka. BioGecko, July 2012, 1: 16-28.

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BELL, TRENT; WILSON, CRAIG & HERBERT, SARAH.

Determining a conservation threat classification for the Nevis skink, Oligosoma toka.

Abstract: A survey was undertaken during October 2011 to obtain information which would allow the data deficient Nevis skink (Oligosoma toka) to be assigned a conservation threat classification. We recommend that this species be assigned the new threat category of ‘Naturally Uncommon (One Location)’, since this rank appears to be the best fit for this species, in accordance to currently available information on range and abundance. The qualifier ‘One Location’ is based on the following considerations: (a) the Nevis skink appears to be unique to the Nevis Valley—a geographically distinct intermontaine basin, (b) the entire skink population should be considered as one large meta-population, and (c) the range of the Nevis skink is no more than 8,900 hectares in extent. In this scenario, a single event (such as a predator irruption or further habitat loss) could affect all individuals in the meta-population. We have crudely estimated the population to be around 20,000 individuals; this figure is a starting point for more accurate estimation in the future.

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