Wikia

Psychology Wiki

Assortative mating

Talk0
34,141pages on
this wiki
Revision as of 12:57, May 25, 2013 by Dr Joe Kiff (Talk | contribs)

Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual differences | Personality | Philosophy | Social |
Methods | Statistics | Clinical | Educational | Industrial | Professional items | World psychology |

Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Neuroscience · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology (Index, Outline)


Assortative mating (also called assortative pairing) takes place when sexually reproducing organisms tend to mate with individuals that are like themselves in some respect (positive assortative mating) or dissimilar (negative assortative mating). In evolution, therefore these two types of assortative mating have the effect of reducing and expanding the range of variation, respectively, when the assorting is cued on heritable traits.

Assortative mating in humans

From a population/evolutionary genetics standpoint, genetic counseling is a strategy of negative assortative mating uniquely found in humans.

Assortative mating in animals

Assortative mating has been invoked to explain sympatric speciation. For some populations there are two different resources for which different genotypes are optimum. Intermediates between these two genotypes are less favorable. It is then favourable if the organisms can recognize mates that are optimized for the same resources as they are themselves. If mutations that make such recognition possible appear, these will be selected for.

For example, Munday et al. (2004) note the speciation of a daughter species from the parent species of coral-dwelling goby fishes that live in a small area of rare coral that the parent species shuns in the ocean around Bootless Bay in southern Papua New Guinea. The daughter species has become reproductively isolated from the parent species even though the parent species surrounds the daughter species so there is no geographic isolation. According to Munday, the speciation in the early stages would depend on assortive mating in which the evolving goby fishes would prefer to mate with other fish that preferred to spawn in the same area of rare coral.


See also


References & Bibliography

Key texts

Books

Papers

Additional material

Books

Papers

  • Munday, P.L., Lynne van Herwerden, & Dudgeon, C.L. (2004). Evidence for sympatric speciation by host shift in the sea. Current Biology, 14, (16), pp. 1498-1504.

See also


This page uses Creative Commons Licensed content from Wikipedia (view authors).

Around Wikia's network

Random Wiki