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प्रश्न
Enlist any six categories into which a given species is placed once it has been thoroughly evaluated by IUCN.
उत्तर
After a given species has been thoroughly evaluated, it is placed into one of following several categories.
- Extinct (EX): A designation applied to species in which the last individual has died or is not recorded.
- Extinct in the Wild (EW): A category containing those species whose members survive only in captivity.
- Critically Endangered (CR): A category containing those species that possess an extremely high risk of extinction with very few surviving members (50).
- Endangered (EN): A designation applied to species that possess a very high risk of extinction as a result of rapid population decline of 50 to more than 70 percent over the previous 10 years (or three generations).
- Vulnerable (VU): A category containing those species that possess a very high risk of extinction as a result of rapid population decline of 30 to more than 50 percent over the previous 10 years (or three generations).
- Near Threatened (NT): A designation applied to species that are close to becoming threatened or may meet the criteria for threatened status in the near future.
संबंधित प्रश्न
Match the following and choose the correct alternative.
| Column I | Column II | ||
| i. | Not evaluated | a. | Pervasive and abundant after careful assessment |
| ii. | Near threatened | b. | Information related to risk of extinction is lacking in some way |
| iii. | Least concern | c. | Described by scientist but not assessed by the IUCN |
| iv. | Data deficient | d. | May meet the criteria for threatened status in the near future |
'The Evil Quartet' is a concept which describes the ______.
The extinction of passenger pigeon was due to ______.
Though the conflict between humans and wildlife started with the evolution of man, the intensity of conflict has increased due to the activities of modern man. Justify your answer with suitable examples.
"Forests provide intangible benefits to us." Explain by taking three different areas, how.
When a species goes extinct in one area, it is often desirable to re-introduce the species from other populations. A major problem with this approach is that ______.
Mention any two places where the ex-situ conservation is undertaken.
The IUCN Red Data List (2004) in the last 500 years documents the extinction of nearly 784 species including ______.
Give definitions of Extinct species.
Write any three criteria on which different types of reflexes are based.
