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Assessment Results




© 2014 Dr. Joachim Nerz (1 of 4 )

AmphibiaWeb species account




IUCN Red List assessment


Conservation Needs Assessment

Pseudoeurycea firscheini   
Assessed for:  Mexico   on: 06 Sep 2018   by: Todd Pierson  
Assessment Status: Completed  
Order:   Caudata     Family:   Plethodontidae

IUCN Global Red List:   Endangered (EN)   
IUCN National Red List:   (not assessed)   
Distribution:     Mexico  
Evolutionary Distinctiveness score:   13.38567987 
Recommended Conservation Actions:   Rescue  , In Situ Research  , Biobanking   
Additional Comments:   Completed by T.W. Pierson in September 2018. 

Question #Short NameQuestion TextResponseComments
1 Extinction risk Current IUCN Red List category. [Data obtained from the IUCN Red List.] Endangered (EN)
2 Possibly extinct Is there a strong possibility that this species might be extinct in the wild? No / unlikely
3 Phylogenetic significance The taxon’s Evolutionary Distinctiveness (ED) score, as generated by the ZSL EDGE program. (These data are not editable by Assessors). ED value < 20
4 Protected habitat Is a population of at least 50% of the individuals of the taxon included within a reliably protected area or areas? Unknown The IUCN SSC Amphibian Specialist Group (2016) reports that this species may be present in Cañon del Río Blanco National Park, but this is not confirmed. It is protected under the "Special Protection" category of Mexican law.
5 Habitat for reintroduction Does enough suitable habitat exist, either within or outside of currently protected areas that is suitable for potential reintroduction or translocation? Unknown This species is still found in several localities, but it is unclear how much high-quality habitat remains.
6 Previous reintroductions Have reintroduction or translocation attempts been made in the past for this species? No
7 Threat mitigation Are the threats facing the taxon, including any new and emerging threats not considered in the IUCN Red List, potentially reversible? Threats cannot/will not be reversed in time The IUCN SSC Amphibian Specialist Group (2016) reports that deforestation--and specifically "the loss of large bromeliad-covered trees"--is the major threat to this species. Apparently, it "does not survive in heavily degraded habitats", but can survive on the forest edge. It is not clear whether it occurs in protected areas, so it is likewise unclear whether threats are being adequately addressed. I am deferring to the evaluation from the previous AArk/ASG Assessment Workshop assessment for this species from 2008.
8 Over-collection from the wild Is the taxon suffering from unsustainable collection within its natural range, either for food, for the pet trade or for any other reason, which threatens the species’ continued persistence in the wild? No / unlikely
9 Population recovery Is the known population of this species in the wild large enough to recover naturally, without ex situ intervention if threats are mitigated? Unknown
10 Biological distinctiveness Does the taxon exhibit, for example, a distinctive reproductive mode, behaviour, aspect of morphology or physiology, within its Class (e.g. Amphibia, Reptilia etc.)? No aspect of biology known to be exceptional
11 Cultural/socio-economic importance Does the taxon have a special human cultural value (e.g. as a national or regional symbol, in a historic context, featuring in traditional stories) or economic value (e.g. food, traditional medicine, tourism) within its natural range or in a wider global context? No
12 Scientific importance Is the species vital to current or planned research other than species-specific ecology/biology/conservation? (e.g. human medicine, climate change, environmental pollutants and conservation science), within its Class (e.g. Amphibia, Reptilia etc.)? No research dependent on this species
13 Ex situ research Does conserving this species (or closely related species) in situ depend upon research that can be most easily carried out ex situ? No
14 Husbandry analog Do the biological and ecological attributes of this species make it suitable for developing husbandry regimes for more threatened related species? i.e. could this species be used in captivity to help to develop husbandry and breeding protocols which could be used for a similar, but more endangered species at a later stage? No
15 Captive breeding Has this species been successfully maintained and bred in captivity? Not held in captivity to date I could find no record of this species in captivity.
16 Educational potential Is the species especially diurnal/active/colourful and therefore suited to be an educational ambassador for conservation of this group of species? No
17 Mandate Is there an existing conservation mandate recommending the ex situ conservation of this taxon? No
18 Range State approval Would a proposed ex situ initiative for this species be supported (and approved) by the range State (either within the range State or out-of-country ex situ)?
19 Founder specimens Are sufficient animals of the taxon available or potentially available (from wild or captive sources) to initiate the specified ex situ program? Yes / probably
20 Taxonomic status Has a complete taxonomic analysis of the species in the wild been carried out, to fully understand the functional unit you wish to conserve (i.e. have species limits been determined)? Yes This species has been included in several molecular phylogenetic studies (Adams et al. 2009; Rovito et al. 2015). Because it has a very small distribution, a further assessment of genetic variation within this species seems unlikely to reveal multiple ESUs, and is probably not necessary to prioritize its conservation.

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