Apostatic selection

Apostatic selection

Apostatic selection is negative frequency-dependent selection by predators, particularly in regard to prey that are different morphs of a polymorphic species that is not a mimic (non-mimetic) of another species. The idea links up with the concept of "search image" from Luuk Tinbergen, whereby - through experience - a predator is considered to have developed a particular skill or capacity to spot prey items of typical appearance (mainly pattern), to the point where typical specimens are even taken disproportionately to their actual abundance within the population. Conversely, specimens of unusual appearance are less likely to end up as part of a predator's diet than would be "justified" if consumption of food items was related to their abundance within the population in a straightforward way. In consequence, there are greater-than-"expected" chances of individuals within a population that are of non-typical appearance passing on the genes controlling that appearance to the next generation.

References

* [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=1063732&itool=iconabstr&query_hl=1 Abstract - Further evidence for apostatic selection by wild passerine birds -9 :1 experiments.]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • apostatic selection — apostatic selection. См. апостатический отбор. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Frequency-dependent selection — is the term given to an evolutionary process where the fitness of a phenotype is dependent on its frequency relative to other phenotypes in a given population. In positive frequency dependent selection (or purifying frequency dependent selection) …   Wikipedia

  • natural selection — noun a) A process by which heritable traits conferring survival and reproductive advantage to individuals, or related individuals, tend to be passed on to succeeding generations and become more frequent in a population, whereas other less… …   Wiktionary

  • апостатический отбор — apostatic selection апостатический отбор. Форма естественного отбора редких вариантов, зависимая от частоты их встречаемости: например, при мимикрии <mimicry> чем реже встречается мимикрирующая форма, тем выше ее селективное преимущество.… …   Молекулярная биология и генетика. Толковый словарь.

  • Polymorphism (biology) — Light morph Jaguar (typical) Dark morph or melanistic Jaguar (about …   Wikipedia

  • Bryan Clarke — Professor Bryan Campbell Clarke FRS, born in 1932, is a British geneticist. He is professor emeritus of genetics at the University of Nottingham Clarke is particularly noted for his work on apostatic selection and other forms of frequency… …   Wikipedia

  • Antipredator adaptation — A lone bison is standing its ground against a pack of wolves, thereby increasing its chance of survival Antipredator adaptations are evolutionary adaptations developed over time, which assist prey organisms in their constant struggle against… …   Wikipedia

  • List of geneticists — This is a list of people who have made notable contributions to genetics. The growth and development of genetics represents the work of many people. This list of geneticists is therefore by no means complete. Contributors of great distinction to… …   Wikipedia

  • Monarch (butterfly) — Monarch Female Male …   Wikipedia

  • List of University of Nottingham people — A list of people related to the University of Nottingham or to its predecessor, University College, Nottingham.Office holdersChancellors* Lord Trent (1949 – 1954) * The Duke of Portland (1954 – 1971) * Sir Francis Hill (1971 – 1978) * Sir Gordon… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”