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Critically endangered (CR) species face an extremely high risk of extinction in the wild. As of July 2017, the International Union for Conservation of Nature (IUCN) listed 1,000 critically endangered fish species, including 87 which are tagged as possibly extinct. [1] [2] Of all evaluated fish species, 3.0% are listed as critically endangered ...
For a species to be considered endangered by the IUCN it must meet certain quantitative criteria which are designed to classify taxa facing "a very high risk of extinction". An even higher risk is faced by critically endangered species, which meet the quantitative criteria for endangered species. Critically endangered fishes are listed ...
The following is a list of currently existing (or, in the jargon of taxonomy) 'extant' species of the infraorder cetacea (for extinct cetacean species, see the list of extinct cetaceans). The list is organized taxonomically into parvorders, superfamilies when applicable, families, subfamilies when applicable, genus, and then species.
A species may be endangered or vulnerable, but not considered rare if it has a large, dispersed population. IUCN uses the term "rare" as a designation for species found in isolated geographical locations. Rare species are generally considered threatened because a small population size is less likely to recover from ecological disasters.
A quarter of the world's maritime traffic passes through the Mediterranean, along extremely dense routes where ships – like marine species – are regularly concentrated by narrow straits (the Dardanelles, the Otranto Channel, the Strait of Messina, the Corsica Channel, the Sicily Channel, the Mouths of Bonifacio, the Corinth Channel and, of ...
Spade-toothed whales are the world’s rarest, with no live sightings ever recorded. ... marine technical adviser for the Department of Conservation, said. ... DNA sequencing in 2002 proved that ...
Marine mammals comprise over 130 living and recently extinct species in three taxonomic orders. The Society for Marine Mammalogy, an international scientific society, maintains a list of valid species and subspecies, most recently updated in October 2015. [1] This list follows the Society's taxonomy regarding and subspecies.
The International Union for Conservation of Nature is the world's oldest global environmental organization. [2] It evaluates threatened species, and treats threatened species not as a single category, but as a group of three categories, depending on the degree to which they are threatened: [3] Vulnerable species Endangered species