About this simulation
- The length of the red bar shows the vitality. It gradually decreases with time. When the vitality is zero, it naturally dies.
- The green bars show stamina (nutritional status). If it is short, it is in a hungry state. When the nutritional status is zero, it starves to death.
- Rabbit breeding conditions: If the stamina of the rabbit is at least 50% and the viability reaches 20%, 40%, 50%, 60% and 80%, then another rabbit will be produced.
- Wolf Breeding Condition: Regardless of the stamina of the wolf, if the vitality reaches 40% and 60%, another wolf will be produced.
- When rabbits and wolves become hungry, their ability to find food improves.
Relationship between preys and predators
In the early 20th century, the Yellowstone National Park in the United States had swept wild wolves to protect deer. As the wolves disappeared, the number of deer, elk, and reindeer increased rapidly.
However, after a certain period of time, as they ate all of the grass, the number of deer also began to decline rapidly. The embarrassed national parks imported 30 wolves from Canada and rescued the ecosystem balance by spinning them into a national park.
The point here is that the presence of wolves helps protect the deer. Wolves mainly eat weak and slow deer, so they make the deer population healthy.
In healthy ecosystems, the prey does not disappear completely, nor does the predator all die by starvation. Preys and predators make equilibrium by repeating increment and decrement.