Chapter 9: Genetic Rescue and Long-Term Population Recovery Flashcards
genetic rescue definition
increase a populations fitness by introducing new genetic variation
how does genetic rescue occur?
- naturally
- facilitates to safeguard at-risk populations & enhance their ability to environmental changes
genetic rescue aims to …
aims to increase genetic diversity & minimize inbreeding to enhance the fitness and adaptability of populations
implementation of genetic rescue
introducing genetically diverse individuals into small, isolated population with low genetic diversity
goal of genetic rescue
rescue species to full genetic health so they can thrive in the wild without further intervention
genetic issues in conservation
- inbreeding
- loss of genetic diversity
- population fragmentation
- genetic drift
- mutations
«_space;gene flow
loss of heterozygosity in small populations & increase in population divergence
> > gene flow
homogenize gene frequencies among populations & impact on the adaptations to the local environmental conditions
F ST
inbreeding due to genetic drift in a small population mating randomly
one migration per generation rule
at least one migrant individual per generation is necessary to prevent significant divergence in allele frequencies among subpopulations
one migration per generation rule effects
minimizes loss of heterozygosity that could lead to inbreeding depression allowing the local adaptation among subpopulations
what proceeded genetic rescue?
- documentation & discovery of genetic decline of a population
- intro from captive stock or wild populations
- local adaptations might be lost
documentation & discovery of genetic decline of a population
- systematics
- DNA sequencing
what caused the reduction of genetic diversity?
- predation
- hunting
- habitat destruction
- inbreeding
genetic restoration
genetic resource banks
