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Describing the classifications of sharks and how they influence humans

Marissa McIntyre

on 19 November 2012

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Transcript of Sharks

A Presentation by Marissa McIntyre Sharks The 8 Orders 2 dorsal fins, anal fin, 5 gill slits, eyes without nictitating membranes, mouth extending behind the eyes, no fin spines Lamniformes 1 dorsal fin, 6/7 gill slits, no nictitating membrane, anal fin Hexanchiformes long snout, mouth underneath, no anal fin Pristiophoriformes anal fin, 5 gill slits, 2 dorsal fins, mouth in front of eyes, no fin spines, short snout Orectolobiformes anal fin, 5 gill slits, 2 dorsal fins, dorsal fin spines Heterodontiformes short snout, mouth underneath, no anal fin, spiracle behind eyes, no lower nictitating eyelid Squaliformes Squantiniformes flattened body, winglike pectoral fins alongside head but not attached, 5 gill slits, spineless dorsal fins on tail, no anal fin Cacharhiniformes nictitating membrane over eyes, 2 dorsal fins, anal fin, 5 gill slits Rough Shark Angel Shark Whale Shark Zebra Shark Blind Shark Brownbanded Bamboo Shark Horn Shark Saw Shark Frilled Shark Broadnose Sevengill Shark Blue Shark Bonnethead Galapagos Shark Coral Cat Shark Bull Shark Sand Tiger Shark Bigeye Thresher Megamouth Great White Shark Port Jackson Shark The Legislature In the US, we have strict regulations on shark fishing. They include: The Numbers Laws to implement catching limits, making sure the marine population doesn't become over-fished Limits on scale, catch, or transport of certain fish. Also protect habitats. Prohibits the fishing of some shark species, such as: Basking Sharks, Bigeye Sand Tigers, Carbbean Reef Sharks, Dusky Sharks, Sand Tigers, Sevengill Sharks, Whale Sharks, etc. Global regulations Some of the laws in other countries: http://www.hsi.org/assets/pdfs/shark_finning_regs_2012.pdf Frilled Shark The Human Effects In the Marshall Islands, sharks are completely protected, all fishing of sharks is banned and fines are high. The Marshall Islands are known as the biggest shark sanctuary in the world (768,547 square miles). Marshall Islands Illinois, Washington, Hawaii, California, and Oregon are all states that have banned the trade, sale, and distribution of shark fins (human) Shark finning banned in more than 60 countries worldwide. However many of these countries have loopholes in the law. In relation to human deaths, shark deaths outnumber them immensely. Shark-related fatalities to humans are incredibly low considering we have drove down the shark population by as much as 80%. The apex predators of the ocean are on the brink of extinction. Sharks bring income to many coastal towns as they are a huge tourist attraction. Because of this, they are protected. Cage diving is a popular recreational activity, locals make money from it and the sharks are typically unharmed. It also gives people a chance to see the great predators up close and develop a better understanding and appreciation for them. Positives Negatives Shark fishing is a fun and thrilling sport, it's intense and high-action once you get one on the line. This also brings in great revenue for the coastal towns. (Many fishers advocate catch and release.) Sharks are becoming increasingly endangered. Sharks are the apex predators of the ocean, we are their only threat. Shark tagging is an exremely important part of how humans influence, and are influenced, by sharks. By tagging the sharks, scientists are then able to better understand their habits, migrating patterns, and general area where they thrive. This makes it easier to implement laws to protect them. Here, Mary Lee, a Great White caught near Cape Cod by Ocearch, is being tagged. She is only the second Great White to be tagged in this region of the North Atlantic. The first being Genie, a Great White caught by the Ocearch team 5 days prior. The information these two sharks provide can show where they've been, you can see this information here: http://sharks-ocearch.verite.com/ Many people have developed the attitude that sharks are vicious and will seek you out to attack and devour you. Those that have dealt with sharks know this proves false. Yes, they are predators. Yes, they do eat meat. And yes, they sometimes have trouble figuring out what is fish and what is human. The human is usually not their intended target, it's a case of mistaken identity. This chart shows the number of sharks being caught in thousands of tons globally throughout the past 60 years. The amount has tripled since the 1950s. The number of shark attacks represented in this graph have almost a direct correlation with the increasing population of humans. The number of humans injured by sharks in 2007 is shown by this small sliver of the pie chart. The number of humans injured in bicycle accidents is shown by the rest of the pie chart. The truth is, we're hurting them more than they're hurting us. This is a photograph of a group of sharks after being finned. The National Oceanic and Atmospheric Administration defines shark finning as the practice of cutting off a shark's fins and returning the remainder of the shark to the water. This is a shark fin after removal Shark in the process of being finned.
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