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Why must alarm pheromones disappear quickly from the environment?

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Animals communicate by sending and receiving signals. For example, a mother dingo (Canis lupus dingo) can communicate certain types of information to her pups by using tactile signals conveyed through grooming. — Animal communication Animals communicate by sending and receiving signals. For example, a mother dingo (*Canis lupus dingo*) can communicate certain types of information to her pups by using tactile signals conveyed through grooming.

Alarm pheromones must disappear quickly from the environment to ensure their effectiveness as a warning signal. Because these chemicals are used to alert other individuals to immediate danger, they require high volatility to disperse rapidly.1

If an alarm pheromone were to persist in the environment, it would be counterproductive for two primary reasons:
* Constant Alarm: The individuals receiving the signal would remain in a continual state of alarm, which is energetically costly and disruptive to normal activities.1
* Habituation: Over time, the animals would likely habituate to the lingering odor, causing them to ignore the signal and thereby reducing its value as a reliable indicator of danger.1

By rapidly decaying, the pheromone ensures that the warning is tied strictly to the immediate presence of a threat, allowing the animals to return to their normal behaviors once the danger has passed.1