is the baiji extinct

The Yangtze River Dolphin, thought of as one of the world's most endangered animals, is now estimated to be the first cetacean to go extinct in our lifetime.

About the Baiji .

The Baiji is a now extinct species of river dolphin that lived exclusively in the Yangtze River in China. The dorsal fin was small and triangular with a wide base and was located more than halfway back.

It is believed that 10% of the world's human population lives in the Yangtze basin today, and massive scale human environmental impacts are a testimony to that. Below the dam, river habitats were destroyed including the sandbanks favoured by baijis. However, it was artisanal fishing activities which were uncontrolled and unselective that are primarily to blame for the baiji's extinction. They are also known as the Whitefin Dolphin, Yangtze Dolphin and White Flag Dolphin. And in an email to the.“Extreme claims for the possible survival of probably extinct species require robust proof, and while I would deeply love there to be strong evidence that the baiji is not extinct, this isn’t it,” wrote Turvey, who participated in the 2006 survey that declared the species functionally extinct.Turvey went on to say that popular attention should instead focus on,That critically endangered species is down to its final 500 to 1,800 individuals, according to the IUCN Red List of Threatened Species. A lethal combination of threats killed far more baijis each year than were being born, and caused an extraordinarily fast decline in baiji numbers. The nosedive in baiji numbers was fast and shocking. Thank you.The baiji's extinction is the first of a large mammal species for 50 years and is directly attributable to mankind.
They are also known as the Whitefin Dolphin, Yangtze Dolphin and White Flag Dolphin. The Baiji usually gave birth every 2 years often birthing just one calf after a gestation period of almost a year. Human exploitation and development of the Yangtze River rapidly escalated and the associated noise pollution increased rapidly as hundreds of boats using the river quickly became thousands of noisy ships using it as an aquatic highway. Unfortunately the search ended with not a single sighting of the river dolphin. The Baiji Yangtze Dolphin is with all probability extinct.

The river dolphin, also known as baiji, is only found in the Yangtze River, China's longest river.

The Baiji--also known as the Chinese River Dolphin, the Yangtze River Dolphin and (less frequently) by its species name, Lipotes vexilifer--occupies that unfortunate interval between a dwindling number of sightings and "functional extinction." Part of the baiji’s skeleton and stomach anatomy are unique (the stomach is divided into three compartments).The extinction of the baiji also marks the extinction of the entire ancient Lipotidae family the baiji represented. The mighty Yangtze River in China was the baiji’s home for 20 million years. Baijis living in the river upstream of the Gezhouba Dam were isolated there.

They were thought to breed thought the first half of the year and it was known that the prime calf season was between February and April.The Baiji were thought to have a lifespan of around 25 years with females reaching sexual maturity at the age of 6 and the males reaching sexual maturity slight earlier at the age of four. And a recent study in,Reported Sighting of Extinct River Dolphin is Unlikely,https://www.nationalgeographic.com/news/2016/10/baiji-extinct-river-dolphin-china-sighting-conservation.html,pollution from thousands of riverside chemical plants,the porpoise could go extinct in the Yangtze as soon as 2041, if not sooner. Human development along the river was intense and rapid. Life must have been very difficult for the surviving baijis and then the final nail in the baiji’s coffin came in the form of the Chinese approval of the Three-Gorges Dam construction. The baiji’s eyesight was poor and anyway not particularly useful because visibility in the water often wasn’t good.Unfortunately the baiji’s ability to communicate, navigate, avoid danger and find food using echolocation became increasingly challenging as the river became a noisy place to live. The construction of the Three Gorges Dam began in 1994; this colossal development on the Yangtze River caused huge scale environmental damage and was the final nail in the coffin for the baiji.Increasing numbers of boats and ships using the river resulted in more baijis being injured and killed by collisions. Baijis (and fishermen alike) favour these habitats to catch fish.The baiji is the only member of the mammal family called Lipotidae. They migrated up- and downstream. So the baiji was a victim of bycatch or incidental mortality rather than direct hunting.In the late 1970s onwards China did put laws into place banning harmful fishing practices and the establishment of a series of reserves in sections of the main Yangtze channel, but the regulations proved difficult or impossible to enforce and in situ reserves proved unable to provide adequate protection for these animals.

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