Thursday, July 18, 2024

A glimmer of hope for northern white rhinos

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No animal is closer to extinction than the northern white rhino in Africa with only two known surviving members of the species, a mother and a daughter.

Both are in captivity in Kenya and under constant guard from poachers. Yet the prospects of their species have long looked bleak as the two surviving females can no longer mate naturally for want of a male.

Encouragingly, however, the efforts of scientists to produce embryos from the females’ eggs and the frozen sperm of a male rhino that died in 2018 are bearing fruit. The scientists have just succeeded in creating two more embryos, which means they now have five at their disposal.

The embryos are stored at a laboratory in Cremona, Italy, and the plan now is to implant them into surrogate mothers in March.

“2020 was really a hard test for all of us, but giving up is not the mentality of any true scientist,” stresses Thomas Hildebrandt from the Leibniz Institute for Zoo and Wildlife Research in Germany who is the leader of the team tasked with the project. “Christmas gave us a present: two embryos. And we are extremely happy about that.”

Yet time is of the essence because the two living rhinos are both ageing and they will still need to serve a large role in saving their species even if they can’t bear young themselves. “We are under time constraint because we want really a transfer of the social knowledge from the last existing northern white rhinos to a calf,” Hildebrandt explains. Read more…

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