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Conservation Summaries for Newly-Described Taxa

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Conservation Summaries for Newly-Described Taxa Species Conservation Summary Silver-headed Antechinus Antechinus argentus Baker, Mutton & Hines, 2013 Dasyuridae Conservation status Critically Endangered (B1ab(iii)+2 ab(iii)) Justification The Silver-headed Antechinus is known only from one very restricted area, with an extent of occurrence of substantially less than 100 km2. The area of occupancy is also highly restricted and is probably less than 10 2 km . The sole account of its status (Baker et al. 2013) considered that it is exposed to some threats that are or may be detrimentally affecting the quality of its Retrospective status 2002 habitat. Critically Endangered (B1ab(iii)+2 ab(iii)) There is no reliable information on population size or trends, but with more information, the species may Retrospective status 1992 also be eligible for threatened status under criterion C and possibly criterion A. Critically Endangered (B1ab(iii)+2 ab(iii)) Current eligibility against IUCN Red List Criteria Previous Action Plan assessment IUCN Not Evaluated, as not then recognised as a distinct Criterion Criteria eligibility species (Maxwell et al. 1996). A Not applicable: population trends unknown B Critically Endangered: EOO <100 km2, and AOO <10 km2; one location; continuing decline in habitat quality IUCN status (2012) C Not applicable: population size not reliably estimated Not Evaluated but probably <10 000 mature individuals; population trends unknown; no extreme fluctuation D Vulnerable: AOO <20 km2, and plausible that a future EPBC Act status (2012) threat could drive the species to CR in a very short time Not listed E Not applicable: no population viability analysis undertaken Legal status in range State IUCN Red List assessment data State/Territory Status Queensland not listed Estimate Reliability Extent of occurrence 20 km2 * low trend stable low Taxonomy Area of occupancy 8 km2 low The first specimen of Silver-headed Antechinus was trend stable low collected in 1992, and was attributed initially to A. No. of mature individuals 1000 low trend stable low flavipes, and subsequently to A. mysticus (Baker et al. No. subpopulations 1 medium 2012). However, with collection of further specimens, No. locations 1 medium its specific status was recognised in 2013 (Baker et al. Largest subpopulation 1000 low 2013). No subspecies are recognised. Generation length 1 year high Global population share 100% high Taxonomic distinctiveness: low (global); low * note that EOO cannot be readily determined because a polygon cannot be drawn around the only two locational points (Australian) Range only two sites from 5080 trap-nights over a 15 year period. This species is known only from the plateau at the Monitoring eastern escarpment of Kroombit Tops National Park, in south-eastern Queensland (Baker et al. 2013). Within There is no formal monitoring program, but Baker et al. this limited area, it has been recorded from only two (2013) reported some repeat sampling of some sites. sites, 5.5 km apart (Baker et al. 2013). Baker et al. (2013) noted that it was possible that its range extends Ecology to comparable habitats beyond Kroombit Tops, but The ecology of the Silver-headed Antechinus is poorly that such sites had been relatively little sampled. known. The habitat at both sites where recorded comprises tall open eucalypt forest with a shrubby Abundance understorey on a plateau at elevation of c. 850-900 m There is no reliable estimate of population size, but the asl (Baker et al. 2013). Silver-headed Antechinus probably occurs at low The species is presumed to have annual male die- density in a very limited area. Baker et al. (2013) off, with a restricted breeding mating period in June- reported a total of 13 individuals were captured from July (Baker et al. 2013). Threats Threat factor Consequence Extent over which threat rating may operate Evidence base Inappropriate fire moderate entire range high intensity and/or extensive fires have been reported regimes recently and may severely reduce shelter sites (Baker et al. 2013) Habitat degradation moderate entire range feral cattle, pigs, and horses are present and are or may be associated with livestock reducing habitat quality (Baker et al. 2013) and feral herbivores Habitat degradation due minor entire range some increase in the weed Lantana camara may be reducing to weeds habitat quality (Baker et al. 2013) Habitat loss due to minor entire range projected climate change may exacerbate fire impacts (Baker climate change et al. 2013) Information required Theme Specific actions Priority Survey to better define distribution expand targeted surveys throughout known and medium-high (current PhD project is potential range considering this: A. Baker pers. comm.) Assess impacts of threats on species undertake autecological studies that better medium (current PhD project is clarify relative impacts of putative threats considering this: A. Baker pers. comm.) Establish or enhance monitoring program design an integrated monitoring program medium-high Assess effectiveness of threat mitigation n/a options Resolve taxonomic uncertainties n/a Assess habitat requirements identify critical habitat factors, particularly in medium (current PhD project is relation to impacts of fire, feral animals and considering this: A. Baker pers. comm.) weeds Assess diet, life history identify key dietary items, life history and shelter low-medium (current PhD project is requirements considering this: A. Baker pers. comm.) Management actions required Theme Specific actions Priority Active mitigation of threats implement fire management of infrequent, patchy, low- high medium intensity fire reduce the abundance of feral pigs, cattle and horses medium Captive breeding establish a captive breeding colony and maintain it at least high until range and abundance are better understood Quarantining isolated populations n/a Translocation n/a Monitoring implement an integrated monitoring program medium Community engagement n/a Recovery Plan Bibliography There is no recovery plan. Baker AM, Mutton TY, Hines HB (2013) A new dasyurid marsupial from Kroombit Tops, south- Current management east Queensland, Australia: the Silver-headed Antechinus, Antechinus argentus sp. The entire range of this species lies within a nov.(Marsupialia: Dasyuridae). Zootaxa 3746, conservation reserve, Kroombit Tops National Park 201-239. (Baker et al. 2013). However, there is no specific Baker AM, Mutton TY, Van Dyck S (2012) A new management for this species. dasyurid marsupial from eastern Queensland, Australia: the Buff-footed Antechinus, Antechinus Conservation objectives mysticus sp. nov. (Marsupialia: Dasyuridae). 1. Clarify range, abundance and threats. Zootaxa 3515, 1-37. 2. Establish monitoring program, linked to Maxwell S, Burbidge AA, Morris K (1996) 'The 1996 management response if population and action plan for Australian marsupials and range continue to decline. monotremes.' Wildlife Australia, Canberra. 3. Establish and maintain a captive breeding colony. Comments received from Andrew Baker _______________________________________________________________________________________ Species Conservation Summary Black-tailed Antechinus Antechinus arktos Baker, Mutton, Hines & Van Dyck, 2014 Dasyuridae Conservation status Endangered (B1ab(v)+2ab(v)) Justification The Black-tailed Antechinus is known only from one restricted area (the Tweed Shield Volcano caldera on the Queensland-New South Wales border), with an extent of occurrence of substantially less than 5000 km2. The area of occupancy is also highly restricted and 2 is probably less than 50 km . The limited available information suggests a continuing decline in abundance. The available data are too limited to reliably estimate population size, or to indicate the rate Retrospective status 2002 of decline. With more information, the species may Endangered (B1ab(v)+2ab(v)) also be eligible for threatened status under criterion C and possibly criterion A. Retrospective status 1992 Current eligibility against IUCN Red List Criteria Endangered (B1ab(v)+2ab(v)) IUCN Criterion Criteria eligibility Previous Action Plan assessment A Not applicable: some decline reported, but insufficient Not Evaluated, as not then considered specifically information to assess the extent and rate of population decline; unlikely to be >30% over 10 years distinct from A. swainsonii (Maxwell et al. 1996). B Endangered: EOO <5000 km2, and AOO <50 km2; continuing decline in population size; one location IUCN status (2012) C Not applicable: population size not reliably estimated but possibly <10 000 mature individuals; possibly Not Evaluated declining but rate probably <10% in 10 years; no. of individuals in largest subpopulation probably >1000; EPBC Act status (2012) no extreme fluctuation D Not applicable: population probably >1000 mature Not listed individuals E Not applicable: no population viability analysis undertaken Legal status in range State State/Territory Status IUCN Red List assessment data Queensland not listed Estimate Reliability New South Wales not listed Extent of occurrence 177 km2 medium trend decreasing low Taxonomy Area of occupancy 32 km2 medium trend decreasing low- This species was formerly considered as a medium geographically isolated population of the relatively No. of mature 2000 low widespread subspecies Antechinus swainsonii mimetes, individuals trend decreasing low but its specific-level distinction was recognised recently No. subpopulations 1 medium (Baker et al. 2014). No subspecies are recognised. No. locations 1 medium Largest subpopulation
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