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Image for A Practical Guide for Genetic Management of Fragmented Animal and Plant Populations

The habitats of most species have been fragmented by human actions, isolating small populations that consequently develop genetic problems. Millions of small, isolated, fragmented populations are likely suffering from inbreeding depression and loss of genetic diversity, greatly increasing their risk of extinction.

Crossing between populations is required to reverse these effects, but managers rarely do so.

A key reason for such inaction is that managers are oftenadvised to manage populations in isolation whenever molecular genetic methods indicate genetic differences among them.

Following this advice will often doom small populations to extinction when the habitat fragmentation and genetic differences were caused by human activities. A paradigm shift isrequired whereby evidence of genetic differentiation among populations is a trigger to ask whether any populations are suffering genetic problems, and if so, whether they can be rescued by augmenting gene flow.

Consequently, there is now an urgent need for an authoritative practical guide to facilitate this paradigm shift in genetic management of fragmented populations.


PSAK Genetics (non-medical), PSVH Animal reproduction, RNCB Biodiversity, RNKH Conservation of wildlife & habitats, RNKH1 Endangered species & extinction of species

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