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harbison
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Location: Tampa Florida
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« on: September 13, 2020, 09:34:37 PM »

SHARK WORLD

The history of sharks is fascinating. Long before dinosaurs walked on earth, sharks were roaming the oceans. Sharks, dating back 450 million years, have lived through every major mass extinction. Sharks are one of the most evolutionarily successful species to ever live. How dangerous are sharks to humans? Movies such as JAWS depict sharks as being extremely dangerous:Sights such as this can indeed be terrifying:Terrifying with the equipment to back it up. Great Whites can have up to 3,000 teeth at one time with five rows. Great White Sharks can have more than 20,000 teeth in it's life time. Computer models indicate that a 21 foot Great White bite can generate 4,000 psi. Confirmed Great White attacks on humans is around 300.In all there has been 51 documented shark attacks in 2020, eight resulted in death. In reality sharks have much more to fear from humans than humans do of them. Humans hunt sharks for their meat, internal organs, skin, and fins in order to make products such as shark fin soup, lubricants, and leather. Because of their tremendous fight shark fishing is extremely popular. Let's take a look:Barotrauma: Barotrauma is an injury caused by a change in pressure. A deep water fish when brought to the surface will often experience barotrauma resulting in an overinflated or ruptured swim bladder as well as other pressure-related injuries. Venting can release the pressure. However, most would prefer not to vent sharks; those teeth are awfully big, and extremely sharp. The good news is that sharks do not have a swim bladder; no venting needed!A shark's liver can produce some of the same functions as a bladder. A sharks liver contains high levels of oily lipids. This gives the shark more of less neutral buoyancy, meaning the shark has roughly the same density as seawater. Having neutral buoyancy relative to the seawater makes it easier for the shark to swim. In addition, sharks use their pectoral fins to control their swimming level. When swimming the shark's tail generates forward movement, and the fins generate lift by moving water more rapidly over the top of the fins than underneath, generating lift. Additionally, sharks can dive by pitching their pectoral fins forward. How important are sharks:   (per OCEANA)As apex predators sharks play an important role in the ecosystem by maintaining the species below them in the food chain and serving as an indicator for oceans health. They help remove the weak and sick as well as keeping the balance with competitors helping to ensure species diversity. Because of their tremendous fight shark fishing is extremely popular.From the deck of the Florida Fisherman ll:The history of sharks is fascinating.Catch the shark fighting video:

https://www.youtube.com/watch?v=DAj9scORO5c

v=DAj9scORO5cCredits:WikipediaGette ImagesforthewinBud GrayOceana
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