Fleeing from the attacks, tropical fish call on the assistance of other predators
Caught between the "Predator" and "Alien", is sometimes enough to duck - and they will understand each other. This approach uses a clever and chromis fish-inhabiting coral oases Pacific.
In case of injury, many fish - from salmon to sea cucumbers - emit certain chemicals. However, the appointment of these compounds is still controversial. Some scientists believe that they can serve as a warning signal for the tribesmen, the other - to help disinfect wounds. Recently, however, ichthyologists Una Lonshtedt (Oona Lonnstedt) and Mark McCormick (Mark McCormick) put forward a completely new and unexpected explanation. According to scientists, this signal can attract other predators - so that the unfortunate victim has a chance to escape deftly while they are confused by the unexpected meeting with each other.
The authors were able to show that the predatory Pseudochromis fuscus really attracted to the smell of fish, chromis injured even more than the smell of large and healthy individuals. This behavior has been demonstrated in the laboratory and in the wild - in the latter case to the action quickly arrived and other predators, which are meeting each other almost always ended with a scuffle.
Intrigued by this, the researchers repeated the experiment with different predators in the tank, watching the scene. And indeed, if a wounded chromis time to multiple predators, they began to fight with each other, but the victim managed to escape much more than if she met with any of them alone. The chances of saving at the same time was estimated at as much as 40% - against several percent at a meeting with the persecutor "eye to eye".
Caught between the "Predator" and "Alien", is sometimes enough to duck - and they will understand each other. This approach uses a clever and chromis fish-inhabiting coral oases Pacific.
In case of injury, many fish - from salmon to sea cucumbers - emit certain chemicals. However, the appointment of these compounds is still controversial. Some scientists believe that they can serve as a warning signal for the tribesmen, the other - to help disinfect wounds. Recently, however, ichthyologists Una Lonshtedt (Oona Lonnstedt) and Mark McCormick (Mark McCormick) put forward a completely new and unexpected explanation. According to scientists, this signal can attract other predators - so that the unfortunate victim has a chance to escape deftly while they are confused by the unexpected meeting with each other.
The authors were able to show that the predatory Pseudochromis fuscus really attracted to the smell of fish, chromis injured even more than the smell of large and healthy individuals. This behavior has been demonstrated in the laboratory and in the wild - in the latter case to the action quickly arrived and other predators, which are meeting each other almost always ended with a scuffle.
Intrigued by this, the researchers repeated the experiment with different predators in the tank, watching the scene. And indeed, if a wounded chromis time to multiple predators, they began to fight with each other, but the victim managed to escape much more than if she met with any of them alone. The chances of saving at the same time was estimated at as much as 40% - against several percent at a meeting with the persecutor "eye to eye".
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