BISC 309 Lecture Notes - Lecture 3: Effective Population Size, Extinction Vortex, Inbreeding Depression
19 Oct 2015
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Document Summary
Start with small populations and you have low effective population size. add in effect of random genetic drift, which results in random loss of rare alleles and loss of heterozygosity. Inbreeding effects result in exposure of deleterious recessives. Both result in loss of genetic variability which is loss of heterozygosity. That loss results in reduction in individual fitness and population adaptability (more related to loss of rare alleles) Populations 1,3,5,6 had about the same hatching success but a couple were able to recover. Mate preference can make population resilient against inbreeding depression as well. In guppies they court females that are less like them because more likely to be mating with females that are less related. We do see selection happening and certain phenotypes will be more likely to be seen. Island population over a period of a decade. you see regular fluctuations. crashes from.
