How Many Southern White Rhinos Are Left

How Many Southern White Rhinos Are Left – When the last northern rhino died last year, his daughters and grandchildren Najin and Fatu were the only two survivors. Credit … Tony Karumba / Agence France-Presse – Getty Images

With a handful of oocytes and piles of sperm accumulating, international scientists are racing against the clock to ensure that the only northern white rhinos left on the planet – both females – are not. Their last category.

How Many Southern White Rhinos Are Left

How Many Southern White Rhinos Are Left

On Sunday, researchers in Italy were able to fertilize 7 of 10 oocytes, or eggs, extracted from both rhinos last week. They used sperm collected from the male rhino before it died.

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Cesare Galli, CEO of Avantea Laboratories in Italy, said the results were better than expected. But it’s just one more step in a continental, year-long conservative effort.

Dr. Galli works together with veterinary researchers and ecologists from the Leibniz Institute for Zoo and Wildlife Research in Germany, the Dvur Kralove Zoo in the Czech Republic and the Ol Pejeta Conservancy in Kenya.

“We can really do something that no one else could do before,” said Jan Stejskal, international project director of Dvur Kralove Zoo. “We still don’t know if we will receive an embryo, but we succeeded. “We showed that there is a real chance for them to have children.”

Not everyone sees this as a worthwhile endeavor. Critics questioned whether operational recovery of endangered species could attract attention from other endangered species.

Southern White Rhinoceros

Scientists at the Avantea Laboratory in Italy bred the eggs of the last remaining white rhinoceros using sperm from two frozen cows Credit… Antonio Calanni/Associated Press

The northern white rhinoceros is a subspecies of the southern white rhinoceros, which has a larger population than ever before Grasslands in East and Central Africa. They have smaller ears and body hair than their relatives, and some researchers have argued that the northern rhinoceros should be considered a separate species.

Human efforts to save endangered species (often created by human threats such as environmental degradation and poaching) are usually time-consuming. But in the case of northern rhinos, race is especially urgent.

How Many Southern White Rhinos Are Left

An animal can be considered endangered if there are tens or hundreds left. But in this case, the only survivors are Najin and Fatu, mother and daughter. And researchers discovered in 2014 that even artificial insemination with sperm probably won’t be an option for them, because it doesn’t seem possible for the body to hold on to the embryo for long.

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The rhino, named Sudan, spent most of his life in the Dvur Kralove Zoo in the Czech Republic. He was captured from the jungle in 1975, which may have helped him. In 1960, there were approximately 2,000 northern rhinos in Africa. But since then, humans have been largely destroyed by habitat loss and poaching.

Sudan moved to a sanctuary in Kenya in 2009 and died aged 45 in March 2018, leaving two women – his daughter Najin and his granddaughter Fatu – alone. From Pejeta Conservancy in Laikipia District, Kenya.

“When he died, it was a sad time for all of us,” said Stephen Ngulu, a Conservative vet. “We found that we collected some sperm from him and a few other males. “So we learned that the only hope for the species was to get eggs from females.”

To retrieve eggs from both rhinos using an ultrasound-guided probe, the animals were placed under general anesthesia. The procedure is risk-free, so researchers and veterinarians know to be extra careful.

The Race To Save The Northern White Rhino

Dr. Frank Göritz, chief veterinarian at the Leibniz Institute in Germany, was responsible for administering anesthesia during the operation, which was supervised by David Ndeereh of the Kenya Wildlife Service and Thomas Hildebrandt of the Leibniz Institute.

“It’s a big day for us,” said Dr. Göritz. “It was a huge success.” He and Dr. Ngolu said the rhino recovered after the sedation.

The eggs – seven from Najin and seven from Fatu – were then sent to Italy to be fertilized with sperm collected last year by two men, Suni and Saút.

How Many Southern White Rhinos Are Left

A monitor showing the fertilization of eggs from the last two female rhinos left in the north with sperm from two cows of the same species at the Avantea Laboratory in Italy Credit… Antonio Calanni/Associated Press

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Dr. Göritz said it would be good to see a northern white rhino born within a few years, so it could coexist with both females and understand their behavior. But that will require a surrogate pregnancy.

Southern white rhinos are probably good candidates for this. San Diego Zoo Global announced last month that a golden calf was born at the San Diego Zoo Safari using hormone-induced ovulation and artificial insemination with sperm. The more perfect the technique, the more likely it is that one of these rhinos will be able to bring the northern rhino to longevity.

But there are still many steps ahead. It is not clear how many eggs fertilized this week will become blastocysts, the next step in embryonic development, said Dr. Gaul from Avantea. That should be clear sometime next week, and even then perfecting the embryo transfer technique can take years and pregnancies can last 16 months or more.

“Even if every egg fails, there is probably a greater chance of being recovered, adding that only fertilization is a big step forward in terms of scientific results,” Galli said.

Embryos From The Last Two Northern White Rhinos Set To Be Implanted

Dr. Göritz agreed. “It’s not just saving the northern white rhino,” he said. “We’ve gained a lot of knowledge and we’ve applied technologies that we can now apply to other endangered species before they reach this stage.” Some rhinos grow, but others have problems. Here’s a look at this endangered species and how you can help them.

According to the World Wildlife Fund, approximately 500,000 rhinos lived throughout Asia and Africa at the beginning of the 20th century. But by 1970, just 70 years later, the number of rhinos had dropped dramatically to 70,000 worldwide. And there are five different types of rhinoceros, including the Javan rhinoceros, Sumatran rhinoceros, one-horned rhinoceros, black rhinoceros, and white rhinoceros.

Although there are no exact numbers, experts believe that only 27,000 to 30,000 rhinos are still alive. “There are two species in Africa: the black rhino with 5,500 animals left and the white rhino with around 18,000,” says Emma Pereira, communications manager at Save the Rhino International. Three other rhinoceroses from Asia: Horned rhinoceros, about 3500 larger. Javan rhino less than 70; And less than 80 Sumatran rhinos.

How Many Southern White Rhinos Are Left

White rhinos now make up the largest part of the rhino population. Found in Africa, white rhinos have two distinct subtypes of genes: northern white rhinos and southern rhinos. Bas Huijbregts, WWF’s African species manager, says: “Today, only two of the remaining northern rhinos are female. They live in the Ol Pejita Conservancy in Kenya and are protected full-time by armed guas.”

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The majority (98.8 percent) of southern rhinos are found in four countries: South Africa, Namibia, Zimbabwe and Kenya. “After more than a century of protection and control, they are now classified as endangered and 19,600 to 21,000 animals are in the private game reserve and reserve,” added Huijbregts. The white rhinoceros is the only species of rhinoceros that is not considered endangered. Instead, it is almost endangered. You will not believe that other species of animals that you have never known are endangered.

The black rhinoceros is the second largest rhinoceros species, numbering approximately 5,500 and having four different subspecies. Found in Africa, black rhinos live in grasslands, grasslands and tropical forests. “Between 1960 and 1995, rhino numbers dropped by 98 percent from 65,000 to less than 2,500,” Huijbregts said. “While the black rhino is still classified as an endangered species, it has come back from extinction. Thanks to continued conservation efforts across Africa, the number of rhinos has doubled from a 20-year historic low to between 5,042 and 5,455 today.

Experts list the Sumatran rhinoceros as the least endangered species in the world, with less than 80 in the world. Wild Sumatran rhinos live mainly in Asia, across Borneo and Sumatra, Indonesia. Hunting and habitat depletion of the population of Sumatra. “Animals live full lives and suffer from low birth rates. It’s hard for them to find mates and reproduce.

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