Alternatively, researchers said crabs might simply not be used to attacking lefties, just as baseball pitchers face fewer left-handed batters."It’s the same thing here in nature," Dietl said. "These snails that are left-handed, they have an advantage. It doesn’t become an advantage if lefties are just as common as righties."
另外一种解释就是,或许螃蟹只是不习惯于攻击那些“左撇子”蜗牛,这就像棒球投手不习惯面对较少的左撇子击球手一样。迪特尔还说:“这些‘左撇子’蜗牛具有生存优势。但如果左撇子和右撇子一样常见的话,那么它也不会演变成这种优势的。”