Using magnets to repel crocodiles 用磁鐵驅趕鱷魚


Florida wildlife managers have launched an experiment to see if they can keep crocodiles from returning to residential neighborhoods by temporarily taping magnets to their heads to disrupt their "homing" ability.


Researchers at Mexico’s Crocodile Museum in Chiapas reported in a biology newsletter they had some success with the method, using it to permanently relocate 20 of the reptiles since 2004.


"We said, ’Hey, we might as well give this a try," Lindsey Hord, the Florida Fish and Wildlife Conservation Commission’s crocodile response coordinator, said on Tuesday.


Crocodiles are notoriously territorial and when biologists move them from urban areas to new homes in the wild, they often go right back to the place where they were captured, traveling up to 10 miles a week to get there.


Scientists believe they rely in part on the Earth’s magnetic fields to navigate, and that taping magnets to both sides of their heads disorients them.



homing:名詞,返回原生地的能力。此字來自當動詞用的home,意為回家、(飛彈等的)導航。homing ability,指洄游魚類、候鳥返回原生地的能力。

relocate:動詞,重新安置。We have to relocate the refugees to a safer location.(我們得將難民安置到更安全的地方。)

disorient:動詞,使……失去方向。The trick disorients many.(這招能讓很多人失去方向感。)

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