NEW RESEARCH INTO COCKROACH BEHAVIOUR
Source: Science Daily
Sorex believe in behaviour led control. We have no doubt that exploiting a pests natural behaviour has to be the best route to effective control.
Recent research has shown that even the seemingly unpredictable aspects of cockroach behaviour have a structure and those seeking to kill cockroaches may be among those to benefit.
When cockroaches flee their predators, they choose, seemingly at random, amongst one of a handful of preferred escape routes, according to a report published on Nov. 13, in Current Biology, a Cell Press publication.
"By using one of a number of possible trajectories, we think that cockroaches may behave with sufficient unpredictability to avoid the possibility that predators will learn their escape strategy," said Paolo Domenici of CNR-IAMC in Italy. "As we say in our report, the predator is made to guess."
Cockroaches have been studied for many years as a model for understanding animal escape responses, he said. While much is known about the neural circuitry underlying their behavior, it still seemed to Domenici's team that open questions remained regarding their strategy.
While the insects don't run away in random directions, they nonetheless didn't seem to flee in an easily predictable manner either. In the new study, the researchers searched for some pattern by repeatedly testing cockroaches as they escaped from threats.
What they found is that cockroaches select one of a number of preferred trajectories. Their choice is not completely random because the angle at which the bugs are stimulated to run seems to limit the options.
However, when they are startled from certain directions—head on, for example—cockroaches flee along four primary escape routes at fixed angles from the threat.
The researchers aren't yet sure exactly how the cockroaches manage this at the neural level, but they suspect they aren't the only animals that do so. The findings also raise questions about the evolutionary forces that drive such unpredictable anti-predator behavior.
More broadly, the results show that "unpredictable" behavioral patterns in nature can actually be quite structured, Domenici said. Animals that may seem to be carrying out a single behavior pattern with wide variation could instead be choosing between multiple strategies.
As for those of us who might occasionally want to kill a roach or two ourselves, Domenici says the insects most often choose an escape path directed at a 90 to 180 degree angle from the attack.
For more information on how to utilise an understanding of cockroach behaviour to maximise control
click here to download the Think Roach Guide.
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