Genetic Considerations

An important consideration for population studies is the effect of inbreeding on reproductive fitness (the combination of fecundity, fertility, and survival). There is strong evidence to demonstrate that inbreeding reduces reproduction and survival in naturally outbreeding species and to a lesser extent in self-fertilization species, whereas increasing the incidence of outbreeding can reverse these deleterious effects. Not only does inbreeding reduce individual reproductive fitness, a population of inbred individuals often results in a declining population and an increased rate of inbreeding. As such, inbreeding is also expected to increase the risk of population extinction. This process begs the question: how much inbreeding can be tolerated without inbreeding depression.? All finite closed populations will eventually become inbred without outbreeding, and even a low frequency of inbreeding is expected to result in some inbreeding depression. Effective population sizes of 50 or greater have been suggested as sufficient to avoid inbreeding depression, although it is generally unknown how large populations must be to avoid inbreeding depression in the long term. This number will also be highly variable among populations as a result of local dynamical processes and extrinsic forces.

10 Ways To Fight Off Cancer

10 Ways To Fight Off Cancer

Learning About 10 Ways Fight Off Cancer Can Have Amazing Benefits For Your Life The Best Tips On How To Keep This Killer At Bay Discovering that you or a loved one has cancer can be utterly terrifying. All the same, once you comprehend the causes of cancer and learn how to reverse those causes, you or your loved one may have more than a fighting chance of beating out cancer.

Get My Free Ebook


Post a comment