When I say outside intervention I mean outside technological intervention that lowers the mortality rate amongst young of a species, which in mammals is about 90%, which fail to reach adulthood. 5,000 was the minimum sample size to rebuild the local wild sage grouse population in captivity, for release. Anything less would have been insufficient in the breeding program to restore the local sage grouse, which was hunted to the point of being endangered.Zontar said:I'm not sure where you got that information, because that's wrong (specifically due to the fact that the number differs greatly depending on both the species and the genetic diversity within the group in question).KyuubiNoKitsune-Hime said:No it's literally a minimum of 5,000 individuals. Less than that and a species/sub-group will go extinct within a few generations, without the aid of outside intervention.Zontar said:Actually is't around 130, with the number dropping to to as little as 70-90 if you are careful in planning over the course of multiple generations to prevent inbreeding. Necessary genetic diversity isn't as high as some would suspectKyuubiNoKitsune-Hime said:Also this bottleneck? If that were true, most modern humans would not exist, because a stable minimum breeding population for genetic diversity, especially in humans, is 5,000 individuals.
Though it's also a moot point given there was outside intervention in the form of Neanderthals, Denisovan and later groups of humans. The only thing is that those later groups of humans don't have all non-Africans as their decedents.
The Neanderthals weren't a significant outside intervention, as they died out... They also didn't reduce the mortality rate of young. Also you ignored what I freaking said. All humans alive today, who are not of strictly pure African ancestry, have at very minimum 1-4% Neanderthal DNA. That sort of cross contamination does not and cannot happen without a significant proportion of interbreeding in the general population of Cro-magnon humans at the time, and the Neanderthals who were present.