Incursions of exotic (non-native) species in the wild create the risk of new pest populations establishing and significantly impacting our environment, economy and/or society. Preventing new pests from entering the wild and establishing is far more cost effective than attempting to eradicate them after they have become established. No widely established pest animal has been successfully eradicated on a mainland. So, detection and prevention of entering or spread of new species is the key to avoiding new pest problems.
Incursions of new species can result from escapes from captivity, deliberate releases, smuggling and stowaways. With the large amount of global and local travel and trade, the risk of incursion events is increasing. There are many examples of animals that have accidentally or deliberately been released into the environment in small numbers and established as pests (rabbits are a prime example). Propagule pressure (the number of release
events and number of individuals released) is a critical aspect influencing where and when animals will establish a free-living population — the more individuals of a species released, the greater the chance that species will establish.
|Author||Invasive Animals CRC|
|Publisher||Invasive Animals CRC|
|Region||Australia - national|