"A preliminary study on sound and acoustic behavior of the Yangtze River finless porpoise,"Investigations on cetacean sonar XI: Intrinsic comparison of the wave shapes of some members of the Phocoenidae family","Study of Yangtze Finless Porpoise Reveals Not All Cetaceans Hear Alike","Appendix II of the Convention on the Conservation of Migratory Species of Wild Animals (CMS)",https://www.wwf.org.uk/learn/wildlife/yangtze-finless-porpoise,Convention on Migratory Species page on the Finless porpoise,https://en.wikipedia.org/w/index.php?title=Finless_porpoise&oldid=977747776,Articles containing Chinese-language text,Articles containing Japanese-language text,Articles with unsourced statements from April 2014,Articles with unsourced statements from July 2013,Articles with specifically marked weasel-worded phrases from July 2013,Wikipedia articles needing clarification from July 2013,Wikipedia articles needing clarification from January 2016,Articles with unsourced statements from November 2009,Articles with unsourced statements from June 2014,Articles with dead external links from July 2013,Creative Commons Attribution-ShareAlike License,This page was last edited on 10 September 2020, at 18:46. The Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis), the world’s only freshwater porpoise, has been upgraded to Critically Endangered on the IUCN Red List of Threatened Species.This follows the recent probable extinction of the other cetacean once found in China’s Yangtze River system, the Yangtze River dolphin or baiji (Lipotes vexillifer). On the other hand, sight is relatively poor, with a reduced lens and a limited number of fibres in the optic nerve and to the muscles moving the eyes.The skeleton is unusually light, accounting for only 5% of the total weight of the animal. Neophocaena asiaeorientalis.
The Baiji Dolphinarium, was established in 1992 at the Institute of Hydrobiology of the Chinese Academy of Sciences in Wuhan which allowing the study of behavioral and biological factors affecting the finless porpoise, specifically breeding biology like seasonal changes in reproductive hormones and breeding behavior.Finless porpoises have commonly been kept in Japan, as well as China and Indonesia. 2018. Behind these are an additional set of,Finless porpoises are opportunistic feeders using various kinds of available food items available in their habitat, including fish, crustaceans, and.In Chinese coastal waters and the Yangtze River, finless porpoises are generally found in groups of three to six,Like other porpoises, their behaviour tends to be not as energetic and showy as that of dolphins. Society for Marine Mammalogy, www.marinemammalscience.org, consulted on 16 April 2019,Encyclopedia of Marine Mammals, 3rd edition,Species and classification provided on pages xxix-xxxi. However, little attention has been paid to freshwater systems, such as the Yangtze River which is the habitat of critically endangered Yangtze finless porpoises (Neophocaena asiaeorientalis asiaeorientalis). The increased vessel traffic may cause death from propeller strikes, and the boat noise may mask the porpoise's ability to communicate with other porpoises, as well as hindering their,As of 2014, 505 porpoises remain in the main section of the.A majority of factors of this population decline are being driven by the massive growth in Chinese industry since 1990 which caused increased shipping and pollution and ultimately environmental degradation.Five protected natural reserves have been established in areas of the highest population density and mortality rates with measures being taken to ban patrolling and harmful fishing gear in those areas. Sight is relatively poor, however, due to the overall cloudiness of the Yangtze River; they have a reduced lens and a limited number of fibres in the optic nerve and to the muscles moving the eyes compared to the,The skeleton is light, accounting for only 5% of the total weight of the animal. There are two subspecies of narrow-ridged finless porpoise, the Yangtze and the East Asian finless porpoises, the former inhabiting the,As the name suggests, the finless porpoise is the only porpoise to lack a true.Finless porpoises can grow to as much as 2.27 m (7 ft 5 in) in length, and can weigh up to 72 kg (159 lb), although most are smaller.

Conservation Status (IUCN) General Population: Endangered (high risk of extinction in the near future) Yangtze River Population: Critically Endangered (facing a very high risk of extinction in the wild) Interesting Facts. Data Development History and Data Quality,Neophocaena asiaeorientalis asiaeorientalis,List of Marine Mammal Species and Subspecies, website (version Aug 2018).Würsig, Bernd, J. G. M. Thewissen, and Kit M. Kovacs, eds.Go Critically endangered (Around 1000 remain) Neophocaena asiaeorientalis Affected by: Climate change , Habitat loss and fragmentation , Food & farming The Yangtze river’s finless porpoise is one of the very few porpoises (relatives of dolphins and whales) that live in fresh water. The auditory system also appears well-developed, with numerous nerve fibres specialised for rapid communication between the ears and the brain.

African Journal of Microbiology Research (2019) Two East Asian finless porpoises (Neophocaena asiaeorientalis sunameri) in Ningbo, East China Sea, China, were observed to be bacterially infected between the fat layer and muscle layer.