Traded products that come from great white sharks include fins, jaws, teeth and meat, cartilage, and skin for leather. This “shark tourism” allows visitors to see great white sharks up close from the safety of a steel cage suspended in the water (Long, 2009). In areas that contain great white sharks, boaters and dive operators can earn a living from “shark tourism”. Great white sharks are never abundant because they are at the top of their food chain. A fully intact jaw of a great white shark can be sold for thousands of dollars. Great white sharks have developed a reputation in the media as being aggressive and ferocious and as a result they have become a highly prized sport fish. Humans hunt great white sharks primarily for sport and for body parts. Negative Impacts: injures humans (bites or stings) It is also possible that great white sharks intend to attack humans where their normal prey may be scarce (Long, 2009). Other authorities contend that these attacks may be the result of the shark mistaking humans for its natural prey, such as seals and sea lions. Many researchers maintain that attacks on humans stem from the shark’s curiosity. Fatality rates as high as 60 percent have been recorded from attacks in the waters off Australia. A review of great white shark attacks off the western United States showed that about 7 percent of attacks were fatal, but data from other localities, such as South Africa, show fatality rates of more than 20 percent. However, if the bite is critical, damaging large organs or appendages, death can result for the victim. If the bite is minimal, the individual may have a chance to seek safety. Great white sharks tend to attack swiftly with a single bite and then retreat. Great white sharks can be dangerous to humans partaking in aquatic activities in the ocean such as swimming, diving, surfing, kayaking and canoeing. Perception Channels: visual tactile chemical electric Great white sharks are also unusual among sharks in that they sometime rais their heads out of the water, apparently to observe activity above the surface.Ĭommunication Channels: visual tactile chemical electric Recent research has demonstrated that great whites are socially complex, featuring such behaviors as parallel swimming, jaw gaping, pectoral fin depression, and even splash-fights. Among similar-sized individuals, the social hierarchy is maintained through a subtle form of body language. Fish in hiding can also be detected this way.Īt feeding aggregations, such as at whale carcasses, this generally solitary species often establishes temporary social hierarchies which are based largely on size. Prey can be detected by the electrical field generated by a beating heart or gill action. They also have the ability to detect electrical charges as small as 0.005 microvolts. They can detect a drop of blood in 100 liters of water. Their primary sense is the ability to smell. Sharks have several highly developed senses.
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