Cooperation dilemma in finite populations under fluctuating environments.
Phys Rev Lett
; 111(23): 238101, 2013 Dec 06.
Article
em En
| MEDLINE
| ID: mdl-24476306
ABSTRACT
We present a novel approach allowing the study of rare events like fixation under fluctuating environments, modeled as extrinsic noise, in evolutionary processes characterized by the dominance of one species. Our treatment consists of mapping the system onto an auxiliary model, exhibiting metastable species coexistence, that can be analyzed semiclassically. This approach enables us to study the interplay between extrinsic and demographic noise on the statistics of interest. We illustrate our theory by considering the paradigmatic prisoner's dilemma game, whose evolution is described by the probability that cooperators fixate the population and replace all defectors. We analytically and numerically demonstrate that extrinsic noise may drastically enhance the cooperation fixation probability and even change its functional dependence on the population size. These results, which generalize earlier works in population genetics, indicate that extrinsic noise may help sustain and promote a much higher level of cooperation than static settings.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Dinâmica Populacional
/
Modelos Estatísticos
/
Comportamento Cooperativo
/
Meio Ambiente
/
Teoria dos Jogos
Tipo de estudo:
Health_economic_evaluation
/
Risk_factors_studies
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Israel