TLS Online TPP Program

#Question id: 11378


Which of the following set of conditions will qualify a species to be considered as critical endangered (EN) as per IUCN criteria?

#Unit 10. Ecological Principles
  1. >90% reduction in population size, <100 km2 area of occupancy, at least 50% estimated extinction risk in three generations.

  2. <2,50 individuals with declining population, <250 mature individuals, at least 20% estimated extinction risk in 20 years

  3. <250 individuals with declining population, <50 mature individuals, at least 50% estimated extinction risk in 10 years.
  4. >90% reduction in population size, <10 km² area of occupancy, at least 50% estimated extinction risk in five generations