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      Inbreeding and extinction in a butterfly metapopulation

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          Directions in Conservation Biology

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            A Practical Model of Metapopulation Dynamics

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              Conservation genetics.

              R Frankham (1995)
              Inbreeding depression, accumulation and loss of deleterious mutations, loss of genetic variation in small populations, genetic adaptation to captivity and its effect on reintroduction success, and outbreeding depression are reviewed. The impact of genetic factors in endangerment and extinction has been underestimated in some recent publications. Inbreeding depression in wildlife and in the field has been clearly established, while its impact has been greatly underestimated. The size of populations where genetic factors become important is higher than previously recognized, as Ne/N ratios average 0.11. Purging effects have been overestimated as a mechanism for eliminating deleterious alleles in small populations. The impact of loss of genetic variation in increasing the susceptibility of populations to environmental stochasticity and catastrophes has generally been ignored. Consequently, extinctions are often attributed to "nongenetic" factors when these may have interacted with genetic factors to cause extinction.
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                Author and article information

                Journal
                Nature
                Nature
                Springer Nature
                0028-0836
                1476-4687
                April 1998
                April 1998
                : 392
                : 6675
                : 491-494
                Article
                10.1038/33136
                968721d0-63bb-4e33-b466-d69e73fee992
                © 1998

                http://www.springer.com/tdm

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