The trapping sites were innovatively positioned to represent a large grid and mice were electronically tagged so researchers could keep precise track of where the animals were being recaptured.

• 捕捉老鼠的地点被定在有类似网格分割的地方，老鼠被电子标记从而使得研究人员可以精确的看到老鼠是在哪里被再次捉到的。