|| 要旨トップ | ESJ54 一般講演一覧 |||日本生態学会全国大会 ESJ54 講演要旨|
There are some empirical evidences that multiple clones of prey population play a major role of prey-predator cycles and the 1/2 period lag (1)
We have shown that a simple prey-predator model with prey evolution can explain prey-predator cycles (2), although we did not discussed the 1/2 period lag.
Prey evolution often destabilizes prey-predator systems. This is intuitively understandable because the prey availability (the number of prey that is not vigilant for the predator) oscilates 1/4 prior to the prredator. The larger rate of prey evolution, the prey-predator system destabilizes and has a stable limit cycle or chaos.
1) Yoshida T et al. (2003) Nature 424: 303-306.
2) Abrams PA, Matsuda H(1997) Evolution 51(6):1740-1748.