The Conservation Status of Gibbons in Vietnam - Gibbon Research ...

Annexesc) area, extent or quality of habitatd) number of locations or subpopulationse) number of mature individuals3) Extreme fluctuations in any of the following:a) extent of occurrenceb) area of occupancyc) number of locations or subpopulationsd) number of mature individualsC) Population size estimated to number fewer than 10,000 mature individuals and one offollowing:1) An estimated continuing decline of at least 10% over the last ten years or threegenerations (which ever is longer), or2) A continuing decline, observed, projected, or inferred, in numbers of mature individualsand population structure in the form of one of the following:a) severely fragmented (i.e no subpopulation estimated to contain more than 1,000mature individuals)b) all individuals are only in one subpopulationD) Population very small or restricted in the form of either of the following:1) Population size estimated to number fewer than 1,000 mature individuals.2) Population with a very restricted area of occupancy (typically less than 100 km 2 ) ornumber of locations (typically fewer than five)So, this taxon will be prone to the effects of human activities; within a very short time period in anuncertain future, and is thus capable of becoming Critically Endangered, Endangered or evenExtinct in a very short time periodE) Quantitative analysis showing the probability of extinction in the wild is at least 10% withinthe next 100 years.138