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Prehistoric bird once thought extinct returns to New Zealand wild
(www.theguardian.com)
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this post was submitted on 29 Aug 2023
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So few of these birds remained that their genetic diversity is a problem for reproducing the species 😕.
“inbreeding depression is a significant problem.[29] The recovery efforts are hampered especially by low fertility of the remaining birds. Genetic analyses have been employed to select captive breeding stock in an effort to preserve the maximum genetic diversity.”
https://en.m.wikipedia.org/wiki/Takah%C4%93
This is a problem with cheetahs as well, where it's theorized that only a small group survived the last ice age, and survived thru inbreeding. Because of this, they are essentially genetic "clones" of one another with almost zero genetic variability, and they have about a 50% chance to successfully receive transplants without the need for the medication typically required to prevent rejection. Source
Do cheetahs seem pretty healthy overall as a species even with low diversity?
They are prone to health problems, particularly those bred in captivity. Cheetahs born in captivity are prone to a disease similar to mad cow disease, which is believed to be transmissible and kills around 70% of the Cheetahs in captivity. It's sad, but also pretty interesting. Source