Currently, the IUCN classifies 54 cetartiodactyl species as data deficient, 146 as lower risk, 40 as vulnerable, 32 as endangered, 14 as critically endangered, 7 as extinct, and 2 as extinct in the wild. The biggest threats to many terrestrial species are habitat loss and fragmentation and overhunting. Several large cetacean species were hunted nearly to extinction until an international treaty banned commercial whaling in the 1980s. Populations of many large, commercially-valuable whales remain severely depleted. Today, cetaceans face threats associated with global climate change, which could have widespread impacts on their food supply in the near future.
- IUCN, 2004. "2004 IUCN Red List of Threatened Species" (On-line). Accessed September 14, 2005 at www.redlist.org.
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