Predator-prey cycles from resonant amplification of demographic stochasticity.
Phys Rev Lett
; 94(21): 218102, 2005 Jun 03.
Article
em En
| MEDLINE
| ID: mdl-16090353
ABSTRACT
We present the simplest individual level model of predator-prey dynamics and show, via direct calculation, that it exhibits cycling behavior. The deterministic analogue of our model, recovered when the number of individuals is infinitely large, is the Volterra system (with density-dependent prey reproduction) which is well known to fail to predict cycles. This difference in behavior can be traced to a resonant amplification of demographic fluctuations which disappears only when the number of individuals is strictly infinite. Our results indicate that additional biological mechanisms, such as predator satiation, may not be necessary to explain observed predator-prey cycles in real (finite) populations.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Comportamento Predatório
/
Dinâmica Populacional
/
Ecossistema
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Reino Unido