挪威人喜食新鲜沙丁鱼。渔民们每次从海上归来,为使鱼不在途中死去而卖好价钱,就在鱼舱里放几条鲶鱼。鲶鱼入舱后因环境陌生而四处乱窜,挑起摩擦和争端,而大量沙丁鱼发现这个个头大的“异己分子”就会紧张起来,加速游动,避免了窒息而死,从而保证了一条条沙丁鱼活蹦乱跳地抵达港口。人们称此现象为“鲶鱼效应”。科学家用老鼠接受刺激的有趣 Norwegians eat fresh sardines. Every time fishermen return from the sea and sell their fish for a fee, they leave a few catfish in the fish tank. Catfish enter the space because of unfamiliar environment and flew around to stir up friction and disputes, and a large number of sardines found that the big “alien ” will be nervous, accelerate swimming, to avoid suffocation and death, thus ensuring the A sardines alive to reach the port. People call this phenomenon “catfish effect”. Scientists use mice to stimulate the interesting