Defence against predators

Strength of the arms is the gorilla's main defence against predators.
The skin of the phantasmal poison frog contains the toxin epibatidine

For most animals, defence against predators is vital. Being eaten is not the only threat to life: parasites and diseases may also be fatal. But many animals are carnivores, and others, especially small animals, are often eaten.

Since life is about reproduction, anything that keeps a creature alive long enough for it to reproduce will be selected for. The next generation comes from the fertilised eggs of the previous generation.

Not surprisingly, then, animals have developed a wide range of defences against predation.[1][2] Some of these defences apply also to plants: herbivory on plants can be very damaging, and reduce a plant's fertility. Many plants have some defence against herbivores.

  1. Edmunds M. 1974. Defence in animals: a survey of anti-predator defences. Longmans, London. ISBN 0-582-44132-3
  2. Ruxton G.D. Sherratt T.N. and Speed M.P. 2004. Avoiding attack: the evolutionary ecology of crypsis, warning signals & mimicry. Oxford University Press. ISBN 0-19-852860-4

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