Mountain Goat (Oreamnos americanus) Conservation Status Review
Review Date = 05/03/2018
ScoreD - 1,000-2,500 individuals
Comment2016 estimate from Smith and DeCesare (2017) is 3,685 individuals within the state, with 2,526 of these in introduced (non-native) populations and 1,159 in populations within historic range (native). Only the native populaiton was considered when ranki
ScoreF - 20,000-200,000 km squared (about 8,000-80,000 square miles)
Comment145,195 square Kilometers from Natural Heritage Program range maps
ScoreE - Relatively Stable (±25% change)
CommentNative populations have declined 3-4 fold since the 1940s and 50s. The majority of introduced populations are stable or increasing. In aggregate the number of goats within the state has remained stable.
ScoreE - Stable. Population, range, area occupied, and/or number or condition of occurrences unchanged or remaining within ±10% fluctuation
CommentAcross both native and introduced populations, population is stable within 10% over the last decade (Smith, B. L., and N. J. DeCesare. 2017. Status of Montana’s mountain goats: A synthesis of management data (1960–2015) and field biologists’ perspectives)
ScoreG - Slightly threatened. Threats, while recognizable, are of low severity, or affecting only a small portion of the population or area.
CommentGenetic isolation, disturbance, climate change
SeverityLow - Low but nontrivial reduction of species population or reversible degradation or reduction of habitat in area affected, with recovery expected in 10-50 years.
CommentDegradation of alpine habitats due t climate change likely irreversible. Impacts from disturbance are reversible within a short timeframe
ScopeLow - 5-20% of total population or area affected
CommentSpecific threats unlikely to impact more than 20% of the population in the next few decades
ImmediacyHigh - Threat is operational (happening now) or imminent (within a year).
ScoreC - Not Intrinsically Vulnerable. Species matures quickly, reproduces frequently, and/or has high fecundity such that populations recover quickly (< 5 years or 2 generations) from decreases in abundance; or species has high dispersal capability such that extirpated populations soon become reestablished through natural recolonization (unaided by humans).
CommentLow fecundity (1 young per year), and isolated populations, but as a managed species, translocation and management can mitigate these vulnerabilities.
ScoreB - Narrow. Specialist. Specific habitat(s) or other abiotic and/or biotic factors (see above) are used or required by the Element, but these key requirements are common and within the generalized range of the species within the area of interest.
Raw Conservation Status Score
3.5 + -0.25 (population size) + 0 (geographic distribution) + 0 (short-term trend) + 0.75 (threats) = 4