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How is that project of reintroducing lost species coming?


It’s tricky with birds, we are told:

While efforts are underway to bring back extinct mammals, such as the woolly mammoth and quagga, through cloning, artificial insemination, and a breeding process that aims to revert domesticated species to phenotypes that closely resemble their wild ancestors, birds’ reproductive systems are not as amenable to these techniques.

So scientists are turning to cultured germ cell transmission, a promising technique that has been used to propagate gene-edited domesticated chickens for more than a decade. The idea is that genes from extinct birds could be replicated and introduced into host embryos’ germlines.

While the technique works well in chickens, current cell culture media do not support wild bird primordial germ cells (PGCs), the precursors to sperm and egg. PGCs ferry genetic sequences into a host so they can be passed down through generations. Revive & Restore, an organization weaving biotechnologies into wildlife conservation and backing much of the research into de-extinction, has made it a priority to develop such media. It would enable the large-scale amplification of wild bird PGCs, perhaps including those of endangered birds, and offer a platform for gene modification that could help return extinct species to life.

W. S. Roberts, “The Booming Call of De-extinction” at The Scientist

Here are some of the real-life challenges that must be faced when, for example, reintroducing the Tasmanian devil to Australia:

Earlier this month, an environmental organization announced it had released 26 Tasmanian devils (Sarcophilus harrisii) into a sanctuary north of Sydney as part of a project to reintroduce the species to the Australian mainland, where it has not existed in the wild for about 3,000 years …

[conservation biologist] John Ewen: This is one of the one of many tricky challenges when it comes to conservation translocation. When a species is lost from a system, something’s gone wrong, and oftentimes, we’re not entirely clear what exactly were the key drivers of the past extinction. Compounding that, the longer the time it’s been since that extinction event and when you’re trying to put the species back, a whole bunch of other things in that ecosystem could also have changed. And so there’s this significant challenge of uncertainty and very complex ecosystems that we’re working within. You have to confront that and try and make the best decisions that you possibly can.

I think that systems like the Australian mainland have changed a lot in 3,000 years. And I’m not sure that we’ve got a complete understanding of what caused the Tasmanian devils to be lost in the first place. . .

Shawna Williams, “How to Reintroduce a Long-Lost Species” at The Scientist

The interesting part will be to see whether—if both the animals and the environment have changed—reintroduction or recreation from advanced genomic techniques produces a viable independent species or a species that humans must indefinitely maintain.

Scientists have no clue about how to clone a mammoth, which is probably impossible. What they are actually working on is the possibility of genetically engineering elephants with heavier coats of hair and cold-tolerant hemoglobin, which might allow them to be introduced into northern Siberia, where they might re-invigorate the environment. Since the engineered genes might even slightly resemble some parts of mammoth genes, they call this work "mammoth cloning" in order to hype the project and obtain funding. Even this scaled-down objective is "mammothly" difficult, and will be a long and arduous process, if it is even feasible. See "How to Clone a Mammoth" by Beth Shapiro. (In the book, Shapiro also discusses the de-extinction process for birds.) https://press.princeton.edu/books/hardcover/9780691157054/how-to-clone-a-mammoth MikeW
Darwinists HATE Darwin and do everything possible to avoid and counteract evolution. polistra
Mac - They're releasing them into enclosures, so they can track what happens, But, TBH, I doubt they'll be as destructive as cats. BTW, here's a short documentary about behavioural interactions between Tasmanian devils and rabbits. Bob O'H
Given the experience Australia has had with invasive species (eg. Rabbits) I am surprised that they would try to reintroduce anything other than very recently extinct animals. Mac McTavish

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