white or black, but not gray. Significance Disruptiveselection is of particular significance in the history ... seeds, and were hence maladaptive. While it is true that disruptiveselection can lead to speciation ... change. This is largely because the results of disruptiveselection are less stable than the results of directional selection directional selection favours individuals at only one end of the spectrum ..., they exhibited disruptive variation in beak size. This variation appeared to be adaptively related ... of the rabbits Suppose directional selection were taking place. The field only has dark rocks in it, so ... in the population. They can only go down, and eventually die out. Consider now the case of disruptiveselection. The result is equal numbers of black and white rabbits, and hence equal numbers of chromosomes ... displacement Balancing selection Directional selection Negative selection natural selection Stabilizing selection Sympatric speciation References references MolecularEvolution DEFAULTSORT DisruptiveSelection Category Selection bg et L hestav valik fa ... more details
Disruptive An innovation that creates a new market by applying a different set of values, which ultimately and unexpectedly overtakes an existing market. E.g., the lower priced Ford Model T A disruptive ... market. In contrast to disruptive innovation, a sustaining innovation does not create new markets ... or revolutionary or continuous i.e. evolutionary . The term disruptive technology has been widely used as a synonym of disruptive innovation , but the latter is now preferred, because market disruption ... application. Sustaining innovations are typically innovations in technology , whereas disruptive innovations ..., but it was not a disruptive innovation, because early automobiles were expensive luxury items ... 49 The mass produced automobile was a disruptive innovation, because it changed the transportation market. The automobile, by itself, was not. The current theoretical understanding of disruptive innovation ... s terms, a firm s existing value networks place insufficient value on the disruptive innovation to allow ... until the day that their disruptive innovation is able to invade the older value network. At that time ... of the term The term disruptive technologies was coined by Clayton M. Christensen and introduced in his 1995 article Disruptive Technologies Catching the Wave , ref Bower, Joseph L. & Christensen, Clayton M. 1995 . Disruptive Technologies Catching the Wave Harvard Business Review , January February ... Harvnb Christensen 2003 . ref Christensen replaced the term disruptive technology with disruptive innovation because he recognized that few technologies are intrinsically disruptive or sustaining in character rather, it is the business model that the technology enables that creates the disruptive impact. The concept of disruptive technology continues a long tradition of the identification ... model, not the technological sophistication itself, Christensen s theory explains why many disruptive ... cleverly to a small, fledgling value network. The theory Christensen defines a disruptive innovation ... more details
as selective pressures . Natural selection is the most familiar type of selection by name. The breeding of dogs, cows and horses, however, represents artificial selection . Subcategories of natural selection are also sometimes distinguished. These include sexual selection , ecological selection , stabilizing selection , disruptiveselection and directional selection more on these below . Selection ... selection favors individuals with intermediate characteristics while its opposite, disruptive ... Distinct from patterns of selection are mechanisms of selection for example, disruptiveselection ... traits or allele s of genes segregating within a population may be subject to selection . Under selection ... than others do. When these traits have a genetic basis, selection can increase the prevalence of those traits, because offspring will genetics inherit those traits from their parents. When selection ... then be said to have evolved . Scientists who do experimental genetics employ artificial selection experiments that permit the survival of organisms with user defined phenotypes. Artificial selection ... or not selection takes place depends on the conditions in which the individuals of a species find ... selection. Factors fostering selection include limits on resources nourishment, habitat space, mates ... neutral , selection does not occur. Meanwhile, selection does not guarantee that advantageous ... may become less common or disappear. In the face of selection even a so called deleterious allele may become universal to the members of a species. This is a risk primarily in the case of weak selection ... s. Though deleterious alleles may sometimes become established, selection may act negatively as well as positively. Negative selection decreases the prevalence of traits that diminish individuals capacity to succeed reproductively i.e. their fitness biology fitness , while positive selection ... selection are sometimes said to be selected against, while those under positive selection are said to be selected ... more details
orphan date August 2009 Minimally Disruptive Medicine http www.bmj.com cgi content full bmj.b2803?ijkey GrnqZhD5tbhn2VA&keytype ref is an approach to patient care in chronic illness proposed by Carl R May , Victor Montori , and Frances Mair . In a 2009 article in the British Medical Journal ref May C, Montori VM, Mair FS. We need minimally disruptive medicine. BMJ 2009 339 b2803 ref they argued that the burden of illness the pathophysiological and psychosocial impact of disease on the sufferer has its counterpart in the burden of treatment the workload delegated to the patient by health professionals, which may include self care and self monitoring, managing therapeutic regimens, organizing doctors visits, tests, and insurance . As medical responses to illness have become more sophisticated, the burden of treatment has grown, and includes increasingly complex techniques and health technologies such as telecare that must be routinely incorporated in everyday life by their users. Minimally Disruptive Medicine is an approach to designing patient care that seeks to consider the effects of treatment work, and in particular to prevent overburdening patients http www.youtube.com watch?v tixfqXq2zVg . Overburdening leads, May. Montori and Mair argued, to structurally induced non compliance with treatment, in which it becomes progressively more difficult for patients especially older patients with multiple co morbidities to meet the demands that therapeutic regimens place upon them. Minimally Disruptive Medicine has a theoretical basis in Normalization Process Theory http www.implementationscience.com content 4 1 29 , which explains the processes by which treatment regimens and other ensembles of cognitive, behavioural and technical practices are routinely incorporated in everyday life ref May C, Finch T. Implementation, embedding, and integration an outline of Normalization Process Theory. Sociology 2009 43 535 54 ref ref May C, Mair FS, Finch T, MacFarlane A, Dowrick C, Treweek ... more details
Image DTO logo.jpg thumb right 200px The Disruptive Technology Office DTO is a funding agency within the United States Intelligence Community . It was until As of 2006 alt recently known as Advanced Research and Development Activity ARDA . ARDA was created in 1998 after the model of the Defense Advanced Research Projects Agency DARPA by the Director of Central Intelligence and the United States Department of Defense Department of Defense , and took responsibility for funding some of DARPA s projects. ARDA evaluates proposals and funds speculative research, particularly in the fields of data mining , video processing , and quantum computing . There has been speculation that the DTO is continuing research efforts started under the Total Information Awareness program TIA in DARPA s Information Awareness Office IAO . Data mining activities within the US Department of Defense are controversial and have met with public and congressional disapproval. Although ARDA s budget is presumably classified as part of the intelligence budget, the New York Times quoted an unnamed former government official saying the agency spent about 100 million a year in 2003. The Associated Press reports that ARDA had a staff of only eight in 2004. Headquartered at Fort George G. Meade in Maryland , site of the headquarters of the National Security Agency , ARDA DTO has kept a low profile, quietly funding research of interest to the intelligence community. In December 2007, DTO was folded into the newly created IARPA http www.afcea.org signal articles templates SIGNAL Article Template.asp?articleid 1399&zoneid 31 . A move to a research park near the University of Maryland, College Park was announced at about the same time http www.newsdesk.umd.edu uniini release.cfm?ArticleID 1561 . See also Disruptive technology References Cite journal author Lanyon, B.P. et al. publisher Centre for Quantum Computer ... computer . This work was supported in part by ... US Disruptive Technologies Office ... . American ... more details
. He utilizes the current version of the DPDU uniform. Officially named DPDU Disruptive Pattern Desert ... observe flight operations.jpg thumb 250px right Disruptive Pattern Naval Uniform A naval version, consisting ... story3.htm ref of various shades of grey with greens, officially named Disruptive Pattern Naval Uniform ... confusion as to why a disruptive pattern was used at all, given that the uniform incorporated ... more details
abbreviations date April 2011 The Disruptive Solutions Process DSP is a concept applied to the mishap prevention part of the combat operations process , often at military tactics tactical or operational level, primarily in Air National Guard applications. However, it has been used successfully in other government agencies and in the private sector. The term disruptive is borrowed from the marketing term disruptive technologies . DSP was created by fighter pilot and United States Air Force Air National Guard Lieutenant colonel United States Lieutenant Colonel Edward Vaughan. ref http www.defenselink.mil news newsarticle.aspx?id 53044 Face of Defense Air Guardsman Entrepreneurial Approach.. ref Overview Typical defense industry bureaucratic approach to problem solving might be to either overwhelm with superior funding, resources, and manpower take any major weapon systems development such as a new fighter jet, for example or secondarily, when resources are constrained, adopt a stance of continuous process improvement, similar to that espoused in Kaizen , Total Quality Management , and Lean Six Sigma . Because most preventable safety mishaps are caused by human factors 83 of FY07 AF Class A costs due to HF per AF Safety Center ref Catalog of Air Force Statistics by Aircraft Type, considered typical for US Military http www.afsc.af.mil organizations aviation aircraftstatistics index.asp ref and can be traced to human cultural and behavioral issues, according to DSP, safety can and should uniquely apply a disruptive solution set to addressing the issues. Such a disruptive, iterative ... bureaucracy, Air National Guard safety pursued a disruptive approach in requirement definition, problem ... disruptive ideas. Then the team assesses initial demonstrations and validations DEM VAL of those ..., developed on location. The disruptive and austere nature of the solution project, and its unexpected ... Lt Col Edward Vaughan about the Disruptive Solutions Process. An article about that interview can be found ... more details
CADPAT Further reading cite book author Blechman, Hardy and Newman, Alex year 2004 title DPM Disruptive ... British military uniforms Category Military camouflage fr Camouflage DPM pl Disruptive Pattern Material ... more details
Other uses Negative selection disambiguation In natural selection , negative selection ref Loewe, L. 2008 . http www.nature.com scitable topicpage Negative Selection 1136 Negative selection . Nature Education 1 1 . ref or purifying selection is the selective removal of alleles that are Mutation Harmful mutations deleterious . This can result in stabilizing selection through the purging of deleterious variations that arise. Purging of deleterious alleles can be achieved on the population genetics level, with as little as a single point mutation being the unit of selection. In such a case, carriers of the harmful point mutation have fewer offspring each generation, reducing the frequency of the mutation in the gene pool. In the case of strong negative selection on a locus, the purging of deleterious variants will result in the occasional removal of genetic linkage linked variation, producing a decrease in the level of variation surrounding the locus under selection. The accidental purging of non deleterious alleles due to such spatial proximity to deleterious alleles is called background selection . ref Brian Charlesworth Charlesworth, B. , Morgan, M. T. and Deborah Charlesworth Charlesworth, D. 1993. The effect of deleterious mutations on neutral molecular variation. Genetics 134 , 1289 1303. http www.genetics.org cgi content abstract 134 4 1289 Link ref This effect increases with higher mutation rate but decreases with higher recombination rate. ref cite journal author Hudson RR, Kaplan NL title Deleterious background selection with recombination journal Genetics volume 141 issue 4 pages 1605 17 year 1995 month December pmid 8601498 pmc 1206891 ref See Also Balancing selection Directional selectionDisruptiveselection Stabilizing selection Assortative mating References Reflist MolecularEvolution genetics stub Category Selection Category Genetics it Selezione ambientale ... more details
also Balancing selectionDisruptiveselection Negative selection natural selection Stabilizing selection .... al. title Positive Natural Selection in the Human Lineage journal Science volume 312 date 2006 doi ... G, Novembre J et. al. title Signals of recent positive selection in a worldwide sample of human populations journal Genome Research date May 2009 MolecularEvolution DEFAULTSORT Directional Selection Category Selection bg et Suunav valik es Selecci n direccional fa ... more details
sequences and miRNA s. ref cite doi 10.1101 gr.6146507 ref See also Balancing selection Directional selectionDisruptiveselection Negative selection natural selection Assortative mating Hypergamy ...Image Selectiontypes n0 images.png thumb 225px A chart showing three types of selection Stabilizing or ambidirectional selection , not the same thing as negative or purifying selection ref cite book last Lemey first Philippe coauthors Marco Salemi, Anne Mieke Vandamme title The Phylogenetic Handbook publisher Cambridge University Press year 2009 isbn 978 0 521 73071 ref ref http www.nature.com scitable topicpage Negative Selection 1136 ref , is a type of natural selection in which genetic diversity decreases as the population stabilizes on a particular Trait biological trait value. This is probably the most common mechanism of action for natural selection. Stabilizing selection commonly uses negative selection a.k.a. purifying selection to select against extreme values of the character. Stabilizing Selection is the opposite of disruptiveselection , instead of favoring individuals with extreme phenotypes, it favors the intermediate variants. It reduces phenotypic variation and maintains the status quo. Natural selection tends to remove the more severe phenotypes, resulting in the reproductive success of the norm or average phenotypes. ref Cite document last1 Campbell first1 Neil A. last2 Reece first2 Jane B. title Biology publisher Benjamin Cummings pages 450 451 date year 2002 isbn ... higher. Stabilizing selection operates most of the time in most populations. This type of selection ... and ferns, has remained largely unchanged for millions of years. Stabilizing selection can ... doi 10.1038 351652a0 ref In human populations, 5 of the genome DNA is under purified selection for common ... Press year 2009 isbn 978 0 521 73071 http www.nature.com scitable topicpage Negative Selection 1136 ... 10.1038 351652a0 cite doi 10.1101 gr.6406307 cite doi 10.1101 gr.6146507 Category Selection Category ... more details
of natural selection In directional selection the allele frequency for a trait continuously shifts in one direction. In stabilizing selection the frequency of the alleles of lower fitness decreases until they vanish. Balancing selection is similar but not identical to disruptiveselection where individuals ... 1975. Ecological genetics . 4th ed. Chapman & Hall, London. ref See also Directional selectionDisruptive ...Balancing selection refers to a number of natural selection selective processes by which multiple allele ... www.sparknotes.com biology evolution naturalselection section1.html ref Evidence for balancing selection ... are not exclusive within any given population by which balancing selection works to maintain polymorphism. The two major and most studied are heterozygote advantage and frequency dependent selection . Mechanisms of balancing selection Heterozygote advantage Image sicklecells.jpg framed Sickle shaped red blood cells. This non lethal condition in heterozygotes is maintained by balancing selection ... advantage In heterozygote advantage , or heterotic balancing selection , an individual who is heterozygous ... selection between fierce selection against homozygous sickle cell sufferers, and selection ... Britannica. Chicago. ref Frequency dependent selection main Frequency dependent selection Frequency dependent selection occurs when the fitness of a phenotype is dependent on its frequency relative to other phenotypes in a given population. In positive frequency dependent selection the fitness of a phenotype increases as it becomes more common. In negative frequency dependent selection ... advantage. MIT Press 1965. ref Selection acts at different levels The fitness of a genotype may depend ... pair on tree trunk.jpg thumb 200px right Two active Grove snails A second kind of selection also .... Thirdly, apostatic selection is likely, with the birds preferentially taking the most common morph .... ref ref Cain A.J. and Currey J.D. 1968. Climate and selection of banding morphs in Cepaea from the climate ... more details
Use American English date July 2011 Other uses Natural Selection disambiguation Evolutionary biology Natural selection is the gradual, non random , process by which trait biology biological traits become ... success are also important, an issue that Charles Darwin developed in his ideas on sexual selection , for example. Natural selection acts on the phenotype , or the observable characteristics of an organism ... emergence of new species . In other words, natural selection is an important process though ... selection , in which humans favour specific traits, in natural selection the environment acts as a sieve through which only certain variations can pass. Natural selection is one of the cornerstones ... of Species , ref name origin Darwin C 1859 On the Origin of Species by Means of Natural Selection ... 2 On the origin of species by means of natural selection, or the preservation of favoured races in the struggle for life . ref in which natural selection was described as analogous to artificial selection ... are systematically favored for reproduction. The concept of natural selection was originally developed ... . Natural selection remains the primary explanation for adaptive evolution . General principles File ... of natural selection on peppered moth evolution . ref name Peppered Moth cite web url http ... of natural selection predates the understanding of genetics, the mechanism of heredity for all known life forms. In modern terms, selection acts on an organism s phenotype, or observable characteristics ... distinction . This is the link between natural selection and genetics, as described in the modern ... evolutionary mechanisms such as genetic drift and gene flow , natural selection appears to be the most ... natural selection has slightly different definitions in different contexts. It is most often defined .... However, natural selection is blind in the sense that changes in phenotype physical and behavioral ... the evolutionary consequence of blind selection and to its mechanisms. ref name fisher Fisher RA 1930 ... more details
Positive selection may refer to Positive selection as an Thymocyte Events during maturation event during thymocyte maturation Directional selection , a particular mode or mechanism of natural selection. disambig immunology T cells that express TCR can bind weakly to self antigenson MHC are selected in positive selection ... more details
Unnatural Selection may refer to tocright Literature Saurians Unnatural Selection comics Saurians Unnatural Selection comics , a 2002 American comic book published by CrossGen Unnatural Selection Buffy novel Unnatural Selection Buffy novel , a 1999 original novel based on the television series Buffy the Vampire Slayer Unnatural Selection 2006 , Gideon Oliver novel by Aaron Elkins Unnatural Selection comics , a collection of comic strips from the Far Side, drawn by Gary Larson. Television Unnatural Selection The Outer Limits Unnatural Selection The Outer Limits , a 1996 episode of The Outer Limits television show Unnatural Selection Stargate SG 1 Unnatural Selection Stargate SG 1 , a 2002 episode of the science fiction television series Stargate SG 1 Unnatural Selection Star Trek The Next Generation Unnatural Selection Star Trek The Next Generation , a 1989 episode in the second season of Star Trek The Next Generation Other Unnatural Selection album Unnatural Selection album , a 1999 album by Flotsam And Jetsam Unnatural Selection video game , a 1993 video game by Maxis Unnatural Selection , a song on Muse s 2009 album The Resistance album The Resistance Unnatural Selection , an entry in the direct to video series P.R.O.B.E. , a spin off of the BBC science fiction series Doctor Who featuring companion character Liz Shaw . See also Artificial selection Natural selection disambiguation ... more details
Wiktionary selectionSelection is the consistent differential survival and reproduction among genotypes. Selection may also refer to In computer science Selection user interface Selection genetic algorithm Selection relational algebra Selection based search , a search engine system in which the user invokes a search query using only the mouse Selection algorithm , an algorithm that finds the k th smallest number in a list Other uses Selected album Selected album , the compilation album by Recoil Selection Australian history , an area of crown land acquired under legislation Selection album Selection album , by 54 40 Selective school Selection in schools , the admission of students on the basis of selective critera Selection effect , a distortion of data arising from the way that the data are collected Selektion , selection of prisoners for execution at a Nazi concentration camp disambig de Selektion es Selecci n fr S lection gl Selecci n ja no Seleksjon sk Selekcia ... more details
Negative selection may refer to In biology Negative selection natural selection , in natural selection it refers to the selective removal of rare alleles that are deleterious Negative selection artificial selection , in artificial selection it refers to where negative, rather than positive, traits of a species are selected for In politics Negative selection politics , is a process that occurs in rigid hierarchies, most notably dictatorships In immunology Negative selection immunology T cells that recognize self MHC molecules and peptides with high affinity are deleted from the repertoire of cells. Central tolerance is produced. Avoids auto immunity. Occurs after positive selection. disambig it Selezione negativa ... more details
Best Selection may refer to Best Selection Japan album Best Selection Japan album , 1994 Best Selection Jimsaku album Best Selection Jimsaku album Best Selection 2010 , a greatest hits album by Korean boy band TVXQ disambiguation Short pages monitor This long comment was added to the page to prevent it from being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Long comment. Please do not remove the monitor template without removing the comment as well. ... more details
The Ultra Selection may refer to The Ultra Selection Mantronix album The Ultra Selection Mantronix album , 2005 The Ultra Selection Spandau Ballet album The Ultra Selection Spandau Ballet album , 2005 disambiguation Short pages monitor This long comment was added to the page to prevent it from being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Long comment. Please do not remove the monitor template without removing the comment as well. ... more details
In computing and user interface engineering , a column selection is a text selection feature found in text editor s which allows the user to select characters in a grid like fashion. This is usually initiated by pressing the alt key instead of the shift key to select text when drag and drop ping. The feature is known by different names in different applications block selection LibreOffice Writer ref http help.libreoffice.org Writer Selection Mode Writer Selection Mode LibreOffice Help ref column selection EditPlus ref http editplus.info wiki FAQ FAQ EditPlus Wiki ref , Vim text editor vi , Emacs non linear text selection TextEdit ref http hints.macworld.com article.php?story 20050509093516708 10.4 Use non linear text selection in TextEdit ref rectangular selection jEdit ref http www.jedit.org users guide selection.html Selecting Text jEdit ref References reflist computing stub Category User interface techniques ... more details
Truncation selection is a Selection genetic algorithm selection method used in genetic algorithm s to select potential candidate solutions for recombination. In truncation selection the candidate solutions are ordered by fitness, and some proportion, p, e.g. p 1 2, 1 3, etc. , of the fittest individuals are selected and reproduced 1 p times. Truncation selection is less sophisticated than many other selection methods, and is not often used in practice. It is used in Muhlenbein s Breeder Genetic Algorithm . ref cite journal journal Evolutionary Computation year 1993 title Predictive Models for the Breeder Genetic Algorithm author H Muhlenbein, D Schlierkamp Voosen url http citeseer.comp.nus.edu.sg rd 0,730860,1,0.25,Download http qSqqSqwww.ais.fraunhofer.deqSq 257EmuehlenqSqpublicationsqSqgmd as ga 93 01.ps ref References reflist compu AI stub comp sci stub bioinformatics stub Category Genetic algorithms ... more details
Tournament selection is a method of selecting an individual from a population of individuals in a genetic algorithm . Tournament selection involves running several tournaments among a few individuals chosen at random from the population. The winner of each tournament the one with the best fitness is selected for Crossover genetic algorithm crossover . Selection pressure is easily adjusted by changing the tournament size. If the tournament size is larger, weak individuals have a smaller chance to be selected. Tournament selection pseudo code choose k the tournament size individuals from the population at random choose the best individual from pool tournament with probability p choose the second best individual with probability p 1 p choose the third best individual with probability p 1 p 2 and so on... Deterministic tournament selection selects the best individual when p 1 in any tournament. A 1 way tournament k 1 selection is equivalent to random selection. The chosen individual can be removed from the population that the selection is made from if desired, otherwise individuals can be selected more than once for the next generation. Tournament selection has several benefits it is efficient to code, works on parallel architectures and allows the selection pressure to be easily adjusted. See Also Fitness proportionate selection Reward based selection References External links http citeseerx.ist.psu.edu viewdoc download jsessionid 621DB995CF9017353A57518149E3CAA4?doi 10.1.1.30.6625&rep rep1&type pdf Genetic Algorithms, Tournament Selection, and the Effects of Noise by Brad L. Miller and David E. Goldberg Portable Document Format PDF link . http citeseerx.ist.psu.edu viewdoc download?doi 10.1.1.19.1850&rep rep1&type pdf Tournament Selection in XCS by Martin V. Butz, Kumara Sastry and David E. Goldberg Portable Document Format PDF link . Category Genetic algorithms ... more details
Tandem selection is a method of artificial selection in which useful traits are selected for sequentially. For instance, one could select for both increased milk Crop yield yield and increased milk fat content in cow s via tandem selection by first selecting those with the best of one trait, say those that produce highest milk yield, and then when that trait is at a satisfactory level, by starting to select for those cows that produce milk with the greatest milk fat content instead. However, for cows to produce milk with greater fat content, yield may have to go down due to, perhaps, limits of the cows metabolism . So, while you are selecting for cows which have increased milk fat content, the yield of milk they are producing may also go down, thus reversing the selection process previously performed to increase it. Therefore, tandem selection has a major disadvantage to other major types of artificial selection for multiple traits, such as culling and index selection , as there is a tendency for the last trait to be lost as the next is being selected. Category Breeding Genetics stub ... more details
unreferenced date August 2010 Selection ratio refers to the ratio of the number job positions to the number of job applicants and is used in the context of selection and recruitment . It is typically assumed to be a number between 0 and 1 where a number closer to zero implies that there are many applicants for any one position. The selection ratio provides information about the value of assessment tools, such as interviews, work samples, and psychometric tests. When the selection ratio is close to one, most applicants will need to be hired in order to fill the available positions. As such knowing that one applicant is likely to perform better than another is of limited value. In contrast when the selection ratio is closer to zero, assessment tools have greater value in indicating which subset of job applicants are likely to perform best. Estimates of the selection ratio can form part of estimates of utility for a given selection and recruitment system. Employment Category Recruitment Category Employment Category Human resource management ja ... more details
Multiple issues unreferenced December 2009 original research September 2007 Ecological selection or environmental selection or survival selection or individual selection or asexual selection refers to natural selection minus sexual selection , i.e. strictly ecological processes that operate on a species ... February 2007 The variant names describe varying circumstances where sexual selection is wholly ... selection can be said to be taking place in any circumstance where inheritance of specific ... is hermaphroditic or asexually reproducing, an ecological selection is taking place. In sexual reproduction ... suppression of sexual selection factors prevents the normal sexual competition rituals and selection from taking place, but which also prevent artificial selection from operating, e.g. arranged marriages ... force. Ecological selection vs sexual selection In cases where ecological and sexual selection factors ... be important to distinguish them as sub processes within natural selection. For instance, Ceratogaulus ... no longer run or evade predators thus ecological selection seems to have ultimately trumped sexual. It is also important to distinguish ecological selection in cases of extreme ecological abundance, e.g. the human built environment , cities or zoos, where sexual selection must generally predominate ..., however it becomes a sexual selection factor. Similar phenomena can be said to exist in humans ... selection from sexual is useful especially in such extreme cases Above examples demonstrate exceptions rather than a typical selection in the wild. In general, ecological selection is assumed to be the dominant process in natural selection , except in highly cognitive species that do not, or do not always ... of its sexual fitness under normal sexual selection processes for that species. For example, if only ... to lack of males, sexual selection has been suppressed by an ecological selection the disaster . Such situations ... such catastrophic events where ecological selection predominates can lead to a population with specific ... more details
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