Tagging animals is a great way for biologists to learn more about the natural world. It can tell them how far certain animals travel, where they go and why, and how they get to their destination. Over time, researchers can make out patterns in these animal movements. When patterns suddenly change, it alerts experts that something might be wrong and they can try to find out what is wrong and tackle the problem before it worsens.

Watch video clip (1): http://www.youtube.com/watch?v=0eye27apFp4

Watch video clip (2): http://www.animalplanet.com/tv-shows/wild-kingdom/videos/tagging-a-whale-shark.htm

Countries can use this information to set aside protected areas where animals can be free from human interference. There are critics who believe that tagging may interfere with the animal’s way of functioning. Heavy electronic tags can slow an animal down or may cause permanent damage. Do you agree with the critics?