From the article, males swim over fairly frequently, but usually leave again when they find no females. So, there is a regular opportunity to add to the gene po

From the article, males swim over fairly frequently, but usually leave again when they find no females. So, there is a regular opportunity to add to the gene pool. What is newsworthy is that there is now at least one female there (sexes of the cubs are unknown). I think it is still a big leap to assume that a sustainable population is inevitable, however, as the occasional visiting male still has to find the female(s) and the resulting population will still be quite inbred.