Summary : ' A Shark 's Lifetime

Sharks do not have skeletons, but just cartilage. Also their jaws can move independently without any of their other body parts. It allows them to have a stronger hold on their prey. Sharks have oil in their liver that allow them to eat less often. So when they eat us up, they must be really hungry. Their fins help them feel vibrations of other creatures so that they can get into position to pounce on their prey.

Sharks are aquatic creatures and very important to the living with lots of information humans may not understand. To start off, femeles give birth to 7-9 sharks per litter that are 3-4 feet at birth. Next humans believe all sharks are monsters but out of 400 species only 4 sharks have been claimed to attack on humans. Lastly sharks attack for 2 main reasons one reason is for defense and predation. They attack in defense when humans are in or around their territory they attack in predation mistaking people for seals. In conclusion sharks are creatures that humans are still learning about and try to understand them better.

Every Jaws fan knows the shark gets it in the end. What they do not know is that too many sharks have gotten it; and that has caused a rapid decline in the shark population over the past thirty years. Since the 1970's, sharks of the Atlantic and Gulf of Mexico shores have declined eighty-five percent. Sharks are vital animal to our world's ecosystem, and if the decline is not controlled; we could be facing devastating problems in years to come. Information has been obtained from two books: The Shark Almanac by Thomas B. Allen and Sharks, An Introduction for the Amateur Naturalist by Sanford A. Moss. Sources also include a number of online references, among them BBC News, ENS News, The New York Times, and two online scientific

Sharks are the top predators. But frankly, they are starting to vanish out of oceans every day. The sharks biggest enemy are humans. Us humans will kill sharks for food. Sometimes people will even take shark teeth and turn them into jewelry. Humans also will cut off the shark’s skin, and turn it into leather. If you find that disturbing, did you know that some individuals will cut out the shark’s liver and make it into a type of medicine?

Sharks are one of the oceans top predators. They vary in size from the extremely small dwarf shark, to the colossal whale shark. Sharks can be found all across the world’s oceans, from the tropic waters of Hawaii to the sub zero temperatures in the Artic oceans. Of the hundreds of sharks a select few species have actually been recorded in the Artic. Of these few, only three of them spend the majority of their time in these harsh, freezing waters. These sharks are the Greenland, Pacific Sleeper, and Salmon sharks.

Many people call sharks beasts, terrible things, killers, but they are not. For instance sharks need to eat to just like humans. Sharks can eat all day. When sharks eat too much they throw it up and eat more. Sharks fend for themselves when they are hungry they might find other sharks and eat them. Sharks eat squid, shrimp, sardines, tuna. Besides sharks can never stop moving so they don't’ stay in one spot. Lastly sharks might look mean but they are

jaw structure. The teeth are actually modified, enlarged placoid scales. The teeth aren’t anchored in the jaw; they are just embedded on the gums. Unfortunately, when the great white shark eats on its prey, it sometimes loses or breaks the tooth by the flesh. Luckily, sharks have developed a special feature that enables it to replace its missing tooth. They have developed rows of teeth, each tooth moving up to replace the missing one. A whole broken row of teeth can be replenished, just like a conveyor belt. Each tooth, though, has a different shape, changing according to its necessity. The great white has triangular, serrated-edged teeth anywhere from one to two inches long. With this feature, the shark is able to tear through the flesh for its meal. The jaw of the shark is made up of strong bone tissue. It must be very powerful because the shark is designed for feeding.

A “Rogue Shark” is a shark that has ‘chosen to attack people, possibly because they have a sensitivity for human complexion’ (Anon., 2011). Their enormous figures, 85% strength mass and unbelievable weight make them brilliant predators, Through the years of 1916-1933 Australian specialist, Victor M. Cooperson acknowledged the concept of the Rogue Shark which nations when a shark has established a taste for human flesh they will stay in an area or perambulation certain coastlines for human kill. so should Rogue Sharks be killed or conserved if they are driven to attack by the taste of human complexion?

However, most of these are not fatal, and new research finds that great whites, who are naturally curious, are "sample biting" then releasing their victims rather than preying on humans. “It's not a terribly comforting distinction, but it does indicate that humans are not actually on the great white's menu(E.O Wilson)”.Great whites are the largest fish and weighing up to 5,000 pounds have been recorded.Highly adapted predators, their mouths are lined with up to 300 serrated, sharp teeth arranged in several rows, and they have an exceptional sense of smell to detect prey. They even have organs that can sense the tiny electromagnetic fields produced by animals. They usually eat sea lions, seals, small toothed whales, and even sea turtles, and carrion.The original hypothesis for the great white's origins is that it shares a common gene with its ancestor with a prehistoric shark. The only predator that can kill a shark is a whale and sometimes whales aren't fast enough to catch the sharks most times.Most sharks live in depths of waters on 12 degrees to 24 degrees fahrenheit. Great white sharks have a great sense of touch through what’s called the lateral line.It is a line that extends along the middle of the shark’s body from its tail to its head. Found in all fish, it is made of cells that can

A shark has multiple rows of teeth. The mouth of sharks is in the front of the head. In some species, sharks teeth are replaced as much as once a week. Some sharks have teeth used to crush and grind. These are some what like what humans have. They also have sharp teeth. These can be compared to incisors that humans have. These types of teeth are very important to sharks because they are carnivores and depend on their teeth in order to eat their prey. A sharks body in covered by scales which cover their bodies. These scales make the skin of a shark very rough and strong.

The Great White Shark eats large fish, seal, porpoise, dolphin and whale.They hunt for their prey by an ambush technique to surprise their prey in order to get their prey.

National issue : Prejudice & racism - chosen based on a form questioning 16 people in which 53.3% of people believed racism was the biggest problem facing Australia. The form questioned 31.4% woman and 68.6% male.

Today I will be informing you all about the most feared and fiercest predator in the sea. In this speech I will be discussing the evolution, physiology, ecological niche and propose a postulate for the future health and survival of the Great White Shark. The Great White is scientifically known as the Carcharodon carcharias and is considered a carnivorous killing machine. This fish has been around for hundreds of millions of years and its evolution has enabled it to develop extraordinary abilities to find and catch prey as well as reproducing to prosper as a species. However, its success is only guaranteed in an environment with no predators. Man has impacted dangerously upon sharks due to the significant slaughter of their numbers. Sharks are not able to respond to this threat. As large and powerful predators, great white sharks play a key role in the ecosystem and was granted a protected status in South Africa, California and Australia. Great white sharks live in all coastal temperate waters around the world and have been found in waters as deep as 300 meters. It had been thought that the Great White Shark have descended from the 50-foot Megalodon also known as the Megatooth Shark due to similarities in tooth structure and saw like edges on their teeth.

Sharks, unlike your average fish, play a different role in the marine ecosystem. While being at the top of the food chain at most times; sharks help to keep other populations of fish with the appropriate size, and by doing that, they also keep other fish and organisms healthy. Over the years, sharks developed an inter-dependency with their ecosystem. They many times eat the fish that are already more debilitated. By doing that, the amount of healthy fish population subdues the debilitated, which means that mainly the healthiest fish will reproduce, originating a generation of healthier and stronger fish. Another impactful role is controlling the spreading of diseases and impeding outbreaks, which also makes a healthier

Sharks have been on Earth for over 400 million years with a wide variety of variations ranging from the powerful Great White Shark to the small Horn Shark of the Northwest Pacific. Throughout shark evolution, they have kept a similar body plan as well as similar hunting strategies while avoiding becoming food for the larger Placoderms of the Devonian to the large marine reptiles that dominated the Mesozoic Period. As the Mesozoic Period came to an end, sharks rose to dominance as the apex marine predator with the largest being Carcharocles megalodon.