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Which of the following is/are criteria for declaring a species as ‘critically endangered’ by the International Union for Conservation of Nature (IUCN)?
At Least 50% reduction in population size over the past 10 years
  • Extent of occurrence is less than 100 km2.
  • At Least 50% probability of extinction in the wild within 10 years.
  • Population size is less than 50 mature individuals
    Select the correct answer using the codes given below:
    • a)
      1 and 2 only
    • b)
      3 and 4 only
    • c)
      2, 3 and 4 only
    • d)
      1, 2, 3 and 4
    Correct answer is option 'C'. Can you explain this answer?
    Verified Answer
    Which of the following is/are criteria for declaring a species as ‘cr...
    A critically endangered (CR) species is one that has been categorized by the International Union for Conservation of Nature (IUCN) as facing an extremely high risk of extinction in the wild.
    To be defined as critically endangered in the Red List, a species must meet any of the following criteria:
    1. At Least 90% reduction in population size over the past 10 years or three generations, whichever is longer. It is when the causes of the reduction are clearly reversible AND understood AND ceased.
    (It is 80% when the causes of reduction may not have ceased OR may not be understood OR may not be reversible)
    1. Extent of occurrence estimated to be less than 100 km2 OR Area of occupancy estimated to be less than 10 km2.
    2. Quantitative analysis showing the probability of extinction in the wild is at least 50% within 10 years or three generations, whichever is the longer.
    3. Population size is less than 50 mature individuals.
    4. Population size is less than 250 mature individuals AND a decline of 25% within 3 years/ one generation.
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    Which of the following is/are criteria for declaring a species as ‘critically endangered’ by the International Union for Conservation of Nature (IUCN)? At Least 50% reduction in population size over the past 10 years Extent of occurrence is less than 100 km2. At Least 50% probability of extinction in the wild within 10 years. Population size is less than 50 mature individuals Select the correct answer using the codes given below:a)1 and 2 onlyb)3 and 4 onlyc)2, 3 and 4 onlyd)1, 2, 3 and 4Correct answer is option 'C'. Can you explain this answer?
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    Which of the following is/are criteria for declaring a species as ‘critically endangered’ by the International Union for Conservation of Nature (IUCN)? At Least 50% reduction in population size over the past 10 years Extent of occurrence is less than 100 km2. At Least 50% probability of extinction in the wild within 10 years. Population size is less than 50 mature individuals Select the correct answer using the codes given below:a)1 and 2 onlyb)3 and 4 onlyc)2, 3 and 4 onlyd)1, 2, 3 and 4Correct answer is option 'C'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following is/are criteria for declaring a species as ‘critically endangered’ by the International Union for Conservation of Nature (IUCN)? At Least 50% reduction in population size over the past 10 years Extent of occurrence is less than 100 km2. At Least 50% probability of extinction in the wild within 10 years. Population size is less than 50 mature individuals Select the correct answer using the codes given below:a)1 and 2 onlyb)3 and 4 onlyc)2, 3 and 4 onlyd)1, 2, 3 and 4Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is/are criteria for declaring a species as ‘critically endangered’ by the International Union for Conservation of Nature (IUCN)? At Least 50% reduction in population size over the past 10 years Extent of occurrence is less than 100 km2. At Least 50% probability of extinction in the wild within 10 years. Population size is less than 50 mature individuals Select the correct answer using the codes given below:a)1 and 2 onlyb)3 and 4 onlyc)2, 3 and 4 onlyd)1, 2, 3 and 4Correct answer is option 'C'. Can you explain this answer?.
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