Cyclic prey evolution with cannibalistic predators.
J Theor Biol
; 479: 1-13, 2019 10 21.
Article
en En
| MEDLINE
| ID: mdl-31265847
ABSTRACT
We investigate the evolution of timidity in a prey species whose predator has cannibalistic tendencies. The ecological model is derived from individual-level processes, in which the prey seeks refuge after detecting a predator, and the predator cannibalises on the conspecific juveniles. Bifurcation analysis of the model reveals ecological bistability between equilibrium and periodic attractors. Using the framework of adaptive dynamics, we classify ten qualitatively different evolutionary scenarios induced by the ecological bistability. These scenarios include ecological attractor switching through catastrophic bifurcations, which can reverse the direction of evolution. We show that such reversals often result in evolutionary cycling of the level of timidity. In the absence of cannibalism, the model never exhibits ecological bistability nor evolutionary cycling. We conclude that cannibalistic predator behaviour can completely change both the ecological dynamics and the evolution of prey.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Timidez
/
Canibalismo
/
Evolución Biológica
/
Modelos Biológicos
Límite:
Animals
Idioma:
En
Revista:
J Theor Biol
Año:
2019
Tipo del documento:
Article