ស្ថានភាពអភិរក្ស

ដោយវិគីភីឌា

ស្ថានភាពអភិរក្ស របស់ក្រុមនៃសារពាង្គកាយ (for instance, a species) indicates whether the group is still extant (that is, members of it are still alive) and if yes, how likely the group is to become extinct in the near future. Many factors are taken into account when assessing conservation status: not simply the number of individuals remaining, but the overall increase or decrease in the population over time, breeding success rates, known threats, and so on.

The IUCN Red List of Threatened Species is the best-known worldwide conservation status listing and ranking system. The system divides threatened species into three categories: Critically Endangered (CR), Endangered (EN), and Vulnerable (VU). Also listed are the documented extinctions that have occurred since AD 1500 and taxa that are extinct in the wild. Lower risk taxa are also divided into categories. The scale of measure has been criticized[ដោយនរណា?] because, with the lowest rating being "Least Concern", it fails to have a 'nil' measure. Therefore it fails to reflect the scenario where a species is plentiful and thriving.

The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) aims to ensure that international trade in specimens of wild animals and plants does not threaten their survival.

ប្រព័ន្ធពហុជាតិ[កែប្រែ]

In the European Union, the EU Wildlife Trade Regulation[១] is legislation to provide for the implementation of CITES within the EU, and additional measures. NatureServe conservation status focuses on Latin America, USA, Canada and the Caribbean, It has been developed over the past three decades by scientists from NatureServe, The Nature Conservancy, and the network of natural heritage programs and data centers. It is increasingly integrated with the IUCN Red List system. Categories for species including: Presumed Extinct (GX), Possibly Extinct (GH), Critically Imperiled (G1), Imperiled (G2), Vulnerable (G3), Apparently Secure (G4), and Secure (G5).[២] The system also allows ambiguous or uncertain ranks including inexact numeric ranks (eg G2?), and range ranks (e.g. G2G3) for when the exact rank is uncertain. NatureServe adds a qualifier for Captive or Cultivated Only (C), which has a similar meaning to the IUCN Red List Extinct in the Wild (EW) status

The Red Data Book of the Russian Federation is used within the Russian Federation.

ប្រព័ន្ធថ្នាក់ជាតិ[កែប្រែ]

Consumer guides[កែប្រែ]

Consumer guides for seafood, such as Seafood Watch, generally divide fish and other sea creatures into three categories, analogous to conservation status categories:

  • Red ("say no" or "avoid")
  • Yellow or orange ("think twice", "good alternatives" or "some concerns")
  • Green ("best seafood choices").

The categories do not simply reflect the imperilment of individual species, but also consider the environmental impacts of how and where they are fished, such as through bycatch or ocean bottom trawlers. Often groups of species are assessed rather than individual species (e.g. Bluefin tuna or squid).

The Marine Conservation Society has 5 levels of ratings for seafood species, as displayed on their Fishonline website.

មើលផងដែរ[កែប្រែ]

ឯកសារយោង[កែប្រែ]

តំណភ្ជាប់ខាងក្រៅ[កែប្រែ]