finless porpoises การใช้

• Finless porpoises are also one of the species protected at Sundarbans National Park.
• Finless porpoises have commonly been kept in Japan, as well as China and Indonesia.
• A sanctuary for these seals is situated at Baengnyeongdo which is also known for local finless porpoises.
• Unlike other members of this family, finless porpoises have lived in captivity for over 15 years.
• The anatomy of finless porpoises has been relatively well studied, compared with that of some other cetacean species.
• In the Yangtze River, finless porpoises are known to leap from the water and perform " tail stands ".
• The Yangtze is highly degraded, and we spotted dramatically fewer finless porpoises than we have in the past ."
• The reserve is already home to 20 finless porpoises, another threatened aquatic mammal found in the Yangtze and elsewhere in Asia.
• Finless porpoises can grow to as much as in length, and can weigh up to, although most are rather smaller.
• This is especially so for Finless Porpoises as they are known to be more elusive, and therefore harder to spot at sea.
• Endangered species include the " Felis bengalensis Manchuria ", and a resident population of Indo-Pacific bottlenose dolphins and finless porpoises.
• Breeding success has always been poor with porpoises, and there are only six recorded births ( of a harbour porpoise and five finless porpoises ).
• Finless porpoises make both high frequency clicking sounds, and longer, low frequency tones, the latter perhaps being for communication, rather than echolocation.
• Monitoring work of Chinese White Dolphins and Finless Porpoises are normally carried out by vessel surveys, helicopter surveys and the use of photo-identification.
• Except for being briefly hunted after World War II due to the lack of seaworthy fishing boats, finless porpoises have never been widely hunted in Japan.
• Cetacean species that have become rare along Chinese coasts are a still present here such as false killer whales and finless porpoises, providing opportunistic observations at times.
• As of 2014, only five hundred and five Yangtze finless porpoises remained in the main section of the Yangtze, with an alarming population density in Ezhou and Zhenjiang.
• As of 2012, the Tian-e-Zhou Oxbow Nature Reserve had about 40 finless porpoises with another 85 in Dongting Lake and 300 400 in Boyang Lake.
• Finless porpoises in this areas are generally smaller than other subspecies, and it is unique that two subspecies inhabit in this region where Matsu region is the northern limit for one of these.
• Both dolphins and finless porpoises, another threatened aquatic mammal found in the Yangtze and elsewhere in Asia, have been moved to that reserve, but have yet to emerge from their endangered status.