= Genetic rescue
<Genetic rescue> is an improvement in <biological population> fitness associated with introduction of <genetic variation>, often through <gene flow> into an inbred <biological population>. It differs from merely increasing numbers by adding individuals: the genetic contribution must improve descendant performance. The Florida panther restoration provided an empirical case in which introduced ancestry was followed by increased <heterozygosity> and improved survival measures. Outcomes depend on compatibility and ecological conditions, rather than making every introduction beneficial. <Genetic Restoration of the Florida Panther by Warren E. Johnson and others>[Johnson and others, 2010, abstract and population-genetic restoration results]{ref}
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