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(inaudible) especially iranian officials never officially charged him with anything and his family says he s diabetic and his health is suffering and he s expected to return to the united states soon. julie: well, you hear gps and think it s a way to navigate roads without getting lost and i love the gps. now the gps devices are being attached to sharks, but not to actually help them navigate the waters. researchers in florida are tagging sharks with gps devices to protect them. . reporter: this is who you to man handle a bull shark. and the doctor does it without getting bit. the university of miami marine scientist has tagged about 20 bull, tiger and hammer heads, satellite tracking gear to their dorsal fins and ....
Sweatshirts. we used to get where we are going and researchers at the university of miami are using g.p.s. devices to track sharks. the technology is used to help a declining shark population caused by overfishing. and now, from our south florida newsroom. tracking sharks? reporter: interesting. the program began there this year by satellite. before g.p.s. technology, unless you saw that fin in the ocean you had in idea where the shark was or what it was doing. this is how you man handle an 8 bull shark. and they do it without getting bit. the university of miami marine scientist has tagged 20 bulls, tigers and hammer heads with g.p.s. and researchers follow ....
It wasn t done before and phil keating went to check it out, live in our miami bureau, what is happening. reporter: the research is greatly understanding our understanding of sharks and their behavior, the thing about it, before gps technology, if you didn t see the dorsal fin in the water you had no idea what the shark was up to. this is how you man handle an 8 foot bull shark! and the doctor does it without getting bit. the university of miami marine scientists tagged 20 bulls and tigers and hammer heads, and, researchers follow their migration and feeding patterns on the internet to better understand the big fish and protect them and scientists say many species declined, 70 to 90% since the 1950s, much due to the shark fin trade, 100 million killed every year. in the ocean they help keep ....
Eight-foot bull shark. this doctor does it without getting bit. the university of miami marine scientists has tagged about 20 bulls, tigers and hammer heads with gear bolted through their dorsal fins. they follow their migration and eating patterns on the internet to better understand them. the species has dekhraeupbd 70 to 90% since the 1950ss that is a hundred million sharks killed every year. they eat the diseased fish, they control the behavior of the animals, and they are at the top of the food chain. reporter: this seven-year-old is a second grade shark activist. she raised $2,000 selling shark cookies and lemonade in ....
Listen to this. scientists are studying whether sharks are able to avoid danger. here with that is cnn s john zarelia. a 6-foot sharp. we have a nice lemon, guys. reporter: the researchers work quickly, taking blood and tissue samples, measurements. university of miami researcher, neil hammershrag is studying the habits of sharks in florida waters. the oil spill has given his company a new more urgent dimension. there is the possibility the animals might be able to anticipate the oil or sense the oil and move away from it. it s really unknown right now. reporter: this lemon shark will provide valuable data. but when it comes to what hammerslag is looking for, it s, well, a lemon. he s after the great sharks, tigers, hammer heads, bulls. they travel greater distances. if his team lands one, it will be tagged with a satellite ....