Cockroaches are collective food critics
June 8, 2010 1 Comment
Collective communication guides cockroach dining decisions
Ever drive by a restaurant with an empty parking lot and avoid it yourself because, well, no one else was eating there? If so, you’re not much different from cockroaches. They also appear more attracted to food resources if other cockroaches dine there, as well.
Yes, cockroaches creep me out, too
They’re the only animal about which I’m phobic, but who could resist a story like this? A new study published in Behavioral Ecology and Social Biology has found that cockroaches communicate with each other about preferable food sources, much as people do. Rather than doing it through visuals of empty parking lots or restaurants or via a critic’s recommendations, however, they probably use pheromones. So, there may be a cockroach pheromone or suite of the chemicals that says, “Hey, this pile of garbage is the best in town!”
The researchers who determined this used a couple of piles of food. The roaches collectively would spend more time and in greater numbers at one pile of food over another. Even more interesting–at least to cockroach researchers–the bugs would linger longer at the dining source if other roaches were there, too. Peer pressure, it appears, is not only a human phenomenon.
It’s not limited only to cockroaches in the insect world, either. There are many other examples of insect chemical communication guiding collective behavior. The most famous is probably the honeybee waggle dance, which the animals use to indicate which way to go to find the best food resources.
Why should we care?
Why would researchers go to the trouble of monitoring cockroach choices over piles of food? One reason is that if we identified the pheromone that communicates “good food pile” to cockroaches, we could use that to lure them into our little pest-control traps. Ever diabolical that way, we humans are. There are some things not even cockroaches can do.