Scientists in Britain have managed to teach bees to pull strings (线) to get to food and then pass on what they have learned to others in their colony (群体) — showing a high level of intelligence despite their tiny brains.
Researchers at Queen Mary University of London said the experiments, often used to test the intelligence of apes (猿) and birds, showed for the first time that some insects are up to the task, and can also pass skills on through several generations.
The findings add to the evidence suggesting the ability for "culture spread"— the ability to learn and pass on knowledge and skills — may not beexclusiveto humans.
In the research, published in the journal PLOS Biology on Tuesday, the scientists were able to train 23 out of a group of 40 bees to pull strings with their legs and feet.
The strings were attached to discs — or artificial "flowers"— containing food at their center but placed under a transparent (透明的) screen. The bees, spotting the food beneath the screen, learned to pull the "flowers" out by pulling the string with their legs and feet to be able to get to it.
From another group of bees given the chance to solve the task without any training, only two of 110 were successful.
Another group of bees was then allowed to observe the trained bees pulling the strings, and 60 percent of them successfully learned the skill. Finally, trained bees were put in colonies, and the scientists found the technique spread successfully to a majority of the colony's worker bees.
Lars Chittka, a Queen Mary University professor who guided the project, said the team is interested in figuring out the brain processes behind the bees' learning and teaching skills.
