" Our analysis shows that about one in 15 sharks killed by fishermen every year , " says study leader Boris Worm , a biology professor at Dalhousie University Canada , said in a statement . " With the increasing demand for shark fins , shark species are now more vulnerable to extinction than ever before .
Based on the available data on mortality and estimates of shark catches illegal , the researchers estimate that 100 million sharks are killed in 2000 and 97 million by 2010 . But because scientists do not have sufficient data on shark catches , they said the actual number of deaths yearly sharks may be between 63 million and 273 million .
Many sharks caught for meat , fish oils and cartilage . In fact often times taken directly from shark fins which are still alive . And in general the shark fin fin soup will be made very tasty . Because sharks have growth and reproduction rates slow , maybe it will give a big loss in the future .
Conservationists say that the depletion of shark populations is alarming , where sharks are apex predators and peranya very important in maintaining the balance of the ecosystem .
" We have seen that if an ecosystem does not have enough predators then this will cause an imbalance in the ecosystem that flows up to the level of marine plants , " said Mike Heithaus , a biologist from Florida International University .(see also: pakan burung kacer)
According to the University of Florida International Shark Attack File , the Sharks have a problem that may be reducing their chances of survival . In a study published last year , a lot of social media reported several incidents of shark attacks on humans . In 2012 , there were 80 shark attacks reported worldwide , but only seven of them are deadly .