Map_thumbnail_large_font

Pachnodus fregatensis

Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA MOLLUSCA GASTROPODA STYLOMMATOPHORA CERASTIDAE

Scientific Name: Pachnodus fregatensis
Species Authority: Van Mol & Coppois, 1980

Assessment Information [top]

Red List Category & Criteria: Endangered A1a ver 3.1
Year Published: 2009
Date Assessed: 2006-01-11
Assessor(s): Gerlach, J.
Reviewer(s): Miller, R.M., Pollock, C.M. & Seddon, M.B.
Justification:
Secondary poisoning with rodent poison (Brodifacoum) in the year 2001 led to a decline in the popualtion of about 87%, relative to the population size in 1999. The causes of this decline have ceased and future population increases are expected.

Geographic Range [top]

Range Description: This terrestrial snail is endemic to Fregate island, Seychelles. It occupies a single, continuous range of only 2 km² (extent of occurrence (EOO) and area of occupancy (AOO) both calculated at 2 km²).
Countries:
Native:
Seychelles (Seychelles (main island group))
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Eradication of rats using Brodifacoum poisoning was associated with an 87% population decline in this species between 1999 and 2001. In 2005, the population was estimated to be 7,700 individuals.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: This snail, the only surviving terrestrial Pachnodus species, is found under logs in lowland woodland, from 1-100 metres above sea level.
Systems: Terrestrial

Threats [top]

Major Threat(s): Predation by rats was speculated to be a threat in the 1990s. Eradication of rats using Brodifacoum poisoning was associated with an 87% population decline in this species between 1999 and 2001. The successful completion of the rodent eradication means that neither of these threats remain. Currently no active threats are known. Large-scale agro-industry farming and plantations caused some habitat degradation in the past.

Conservation Actions [top]

Conservation Actions: A captive assurance colony is maintained by the Zoological Society of London, and habitat restoration is in place. Continued monitoring of the population status is necessary.

Citation: Gerlach, J. 2009. Pachnodus fregatensis. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 26 July 2014.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided