Group selection

Group selection is a proposed mechanism of evolution in which natural selection acts at the level of the group, instead of at the more conventional level of the individual. Early authors such as V. Wynne-Edwards and Konrad Lorenz argued that the behavior of animals could affect their survival and reproduction as groups, . Bufret Lignende Oversett denne siden Group selection , in biology, a type of natural selection that acts collectively on all members of a given group. Group selection may also be defined as selection in which traits evolve according to the fitness (survival and reproductive success) of groups or, mathematically, as selection in which overall group fitness is higher or.

Although group selection remains a controversial topic in evolutionary biology, experimental studies, in both laboratory and fiel have shown that groups have the necessary properties of replication, variation, and heredity. Indee given the known processes of group formation, these essential properties must be common. Group selection has become a scientific dust bunny, a hairy blob in which anything having to do with groups clings to anything having to do with selection. Selection among groups rather than individuals is not a straightforward idea, especially not ontologically. Nonetheless, the notion of group selection is often used in evolutionary discourse, especially for explaining the evolution of altruism or sociality (the tendency to form social groups).

Whenever the topic of “ group selection ” was brought up, a ferocious argument always seemed to ensue. Thus came the idea of group selection as a process in which an individual acted for the good of the group, regardless of whether it should benefit the individual or be detrimental to the individual.

Want to start a brawl at an evolution conference? Just bring up the concept of group selection : the idea that one mixed bag of individuals can be “selected” as a group over other heterogeneous groups from the same species. Biologists who would not hesitate to form a group themselves to combat . Group selection , which was once widely rejected as a significant evolutionary force, is now accepted by all who seriously study the subject.

There is still widespread confusion about group selection , however, not only among students and the general public, but among professional evolutionists who do not . Group selection describes natural selection operating between groups of organisms, rather than between individuals. This would produce adaptations that benefit the group, rather than the individual. A survey of evolutionary anthropologists on the subject of group selection provides evidence that the tide of opinion has turned on that once heretical subject. Examples include the sterile . Animals maximize their inclusive fitness. Such statements can be read in many of the chapters of this book, as well as in many recent interesting papers in behavioural ecology and animal . This article harshly and violently criticizes the established and 40-year-old kin selection and inclusive fitness theory, and argues that group selection theory should be used instead.

Yet, the anti- group selection team typically considers that “inclusive fitness is as general as the genetical theory of natural . WYNNE-EDWARDS has argued persuasively for the importance of behaviour in regulating the density of animal populations, and has suggested that since such behaviour favours the survival of the group and not of the individual it must have evolved by a process of group selection. It is the purpose of this . Some of this is worth drawing out.

The old story of group .