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On a simple level the population sizes of predators and prey will oscillate up and down slightly out of sync with each other.

Imagine Rabbits and foxes.

1. Foxes will eat many rabbits and rabbit numbers will decrease

2. Foxes begin to run out of food and so will start to die of hunger and so the numbers of the foxes will decrease.

3. As numbers of foxes decrease, less foxes are eating the rabbits, the rabbits can breed and increase their numbers.

4. Foxes have more food again and start eating the rabbits, they increase in number as the rabbit population falls again and so the cycle continues.

If you Google predator-prey population diagram, you will see the populations between predators and preys oscillate most of the time.

The predator eats the prey. However, the predator doesn't necessary have an easy life of it. There are always more prey animals than predators, and some of them have developed aggressive defenses to avoid being eaten. Some creatures, while technically prey, are effectively immune to predation except as infants or old and sick. These include elephants, musk oxen and skunks.

It's a sort of biological arms race. As prey become faster, more dangerous and more alert, predators have to become faster and sneakier.

One of Aesop's fable illustrates a predator-prey relationship. A dog fails to catch a rabbit and a man mocks him for being so much bigger and still losing. The dog replies (animals can talk in fables): "Remember, I was running for my dinner, but the rabbit was running for its life."

It describes the relationship between the two, such as the tendency for prey to be much more wary around a predator, even if they are not hungry; or for a predator that is not hungry to chase prey that runs. A Dominant/submissive relationship.

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8y ago

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