Evidence on Prehistoric Sharks One of the previous papers in English class required the class to pick a paper to explore, this question will be concentrated on further in the synthesis essay. What evidence do scientist have to prove that prehistoric sharks existed? The reason behind picking this question wasn’t just to find proof that these monsters swam the seas, but to learn more about them from different resources. One of the resources that were used was a chapter in Angelo Mojetta’s book Sharks, called “ The Birth Of A Legend”. The other resource that was used for information was an article in Discovery Channels website called “ Prehistoric Sharks”. Sharks and Discovery Channel are the two resources that led to many other questions about their different, and similar views on prehistoric sharks existence. Mojetta wrote about prehistoric sharks, and the history of these creatures. According to Angelo Mojetta, author of Sharks, Cladoselache genus, one of the first prehistoric sharks, was buried in sediment that kept it preserved. Unlike other sharks, Cladoselache genus had a circle of tiny plates around it’s eyes for protection against it’s victim’s attempts to fight back. These sharks lived over 400 million years ago. Sharks of the past could mostly be identified by their teeth, because shark’s bodies are made of cartilage. Another shark that was focused on was called, Stethacanthus. This shark had a very unique look. Stethacanthus had a brush like decoration on the top of it’s head, and an extra fin like part that had the same bristle like decorations on it. These characteristics were thought to be used as suction cups, to hitch rides from larger fish. One of the most famous sharks that looks like an over... ... middle of paper ... ...lodon and Dunkleosteus, it left you wanting more. Mojetta and Discovery Channel makes people want to know more about the prehistoric sharks that swam the dark seas. Mojetta and Discovery Channel had a lot of strong data on prehistoric sharks. The information that was presented in their text gives people knowledge of prehistoric sharks characteristics, time frame they lived in and the remains of these creatures. These bits of information might raise more questions for people about evolution. There have been many different species of prehistoric sharks discovered throughout the years. Work Cited Works Cited Mojetta, Angelo. White Star Guides Underwater World. Vercelli, Italy: White Star, 1997. Print. “ Prehistoric Sharks: Discovery Channel.”dsc.discovery.com. N.p., n.d. Web. 4 Aug 2010
Every year, there are about 100 million Sharks killed, ultimately for its commercial success. Their fins are used as the main ingredient for a dish so-called Shark soup. However, many are unaware of the actual importance of Sharks' existence on Earth. They do a number of things to control and balance aquatic life down below, which in return affects how we live on the surface. Sharks have existed in our world for over 400 million years, if they were to suddenly disappear for industrial purposes, much problems will be encountered throughout the world. We must preserve the lives of Sharks, for many reasons most importantly that shark hunting is morally wrong, it may provide economic failure in a given time, and it may serve a critical unbalance of a healthy environmental state.
The film Sharkwater is a documentary directed and produced by Rob Stewart. Rob is an underwater photographer and a biologist that has a fascination with sharks, and their behavioral aspects. His way of studying these creatures he is able to learn about life and how to survive on this earth. This film showed the characteristics of reflexive documentary, this is because of the attention drawn into the sharks, their behaviors, and how we are affecting them. A statement that really stuck the documentary is people are taught their whole entire lives that sharks are dangerous but when you finally see it underwater your whole life can change in a flash. Rob made a very valid point as well, which is believed to be his thesis statement.
In my research, the Oceans of Kansas organization for Paleontology has given me more than enough to focus on when depicting out how to correlate our modern logic about how Kansas is mostly a wasteland to when it used to be an ocean with striving life within. The sharks that have been recently discovered are increasing not only in size, but by type. Mike Everhart, lead Paleontologist of this organization, in April 2002 discovered an extremely large shark called the Cretoxyrhina Mantelli "Ginsu Shark". “A large lamniform shark found worldwide from Turonian into Campanian time during the Late Cretaceous. Much the same size as a modern Great White (but not closely related), the Ginsu shark reached lengths of more than 6 meters before becoming extinct about 82 million years ago.
The Great Shark debate – to cull or not to cull, has been at the forefront of the minds of conservationists, as well as the general population for many decades now. The opinions of everyone are divided, according to their personal experiences, and views on what is right and wrong for the environment.
Sharks have several ways to dispatch their prey with surprise attacks, agility, and camouflaged sneak attacks. The shark’s dentition also tells the story of their diet as well as their method of attack. The Great White Shark, (Carcharodon carcharias), is the largest extant predatory shark on Earth and has large serrated teeth that tear through the flesh of its prey. Their teeth are 2.5-3 inches in height and have prominent serrations which allow them to tear large chunks out of prey including large fish, seals, sea lions, other sharks, carrion, dolphins, elephant seals, stingrays, and fish [8], [13]. These sharks hunt by swimming below the intended prey item and with a sudden burst of speed; they will attack with a large single bite and then swim off to allow the prey to bleed to death. These sharks are famous for breaching the water to grab seals and sea lions around the coast of South Africa in an area called Seal Island [7]. When the seals swim farther off from the island where the water is much deeper, the shark’s rate of a successful attack increase compared to the lowered success rate in shallower waters where the seals can easily outmaneuver them [7]. The bite force of the Great White measures around 4,000 pounds and is able to bite prey in half [10]. Great Whites
Have you ever wondered what the scariest shark is? I know i have. Well the scariest looking shark i know is the basking shark. The basking shark has a huge mouth and will eat you if you mess with it. These animals don't have a regular nutrient cycle they just eat what they really can. There natural biome is .The habitat
When most people hear the word "shark", the image of a vicious killing machine pops into their head. They picture something out of the movie Jaws, where a massive Great White shark terrorizes an entire beach and eats dozens of people. However, this fictional story is nothing more than Hollywood entertainment. In the real world, the tables are turned. Humans are the ones who kill sharks, and not just by the dozens. It has been estimated that over 100 million sharks are killed every year by humans (http://www.iflscience.com). Some estimates claim that the actual number of sharks killed every year could be as high as 273 million (http://www.iflscience.com). In this research paper, I will inform you of the many ways that sharks are being killed,
In 2015 only 59 shark attacks have occurred around the world compared to the millions of sharks killed by humans every year. Due to these accidental shark attacks people tend to think that sharks, especially Great Whites are evil creatures with malice intentions when attacks do occur; but, on the contrary that is wrong. Sharks are not the only beautiful and unique creatures in the ocean, they also play a vital role in our ecosystem; however, due to human interference they might not be around much longer, through awareness sharks can be protected from endangerment.
The origin of modern day whales, a mystery that has puzzled paleontologists for years, may have just been solved with the discovery of an ankle bone. This discovery might sound simple and unimportant, but the bones of these ancient animals hold many unanswered questions and provide solid proof of origin and behavior. The relationship between whales and other animals has proven to be difficult because whales are warm-blooded, like humans, yet they live in the sea. The fact that they are warm-blooded suggests that they are related to some type of land animal. However, the questions of exactly which animal, and how whales evolved from land to water, have remained unanswered until now.
Specific Purpose: To persuade the audience to go online and sign a petition to help stop shark killings and to support the entire Racing Extinction cause in order to save species around the world from going extinct.
To go for an actual skeleton tour and see these specimens so intact and will preserved is surreal. This tour showed me how little I now, I did not even now that dolphins have advance bone structure, and how bone structures make them look and function differently in life. So this turn to be fun learning experience and have changed my perception of since learning, comparing skeletons is fun and for a while I forgot I was working on an assignment. The set-up of the skeletons were great, an excellent overall learning environment, very informative and interesting at the same time.
Most people think that sharks are large, fast-swimmers, and savage predators. This is true of some species and groups should be interested of the appealing aspects of biology found within it: all sharks have an excellent sense of smell; some can detect electrical discharges; some sharks give birth to one of the
Thesis: Sharks should be conserved because they are an important part of the ocean, attacks are often incidental, and human behavior influences the behavior of sharks.
Riley, M. J., A. Harman., and R. G. Rees. 2009. Evidence of continued hunting of whale sharks Rhincodon typus in the Maldives. Environ. Biol. Fish. 86:371-374. (DOI:10.1007/s10641-009-9541-0).
One particularly interesting sea creature is the whale shark, formally known as Rhincondon typus it was first discovered in 1828 by Andrew Smith (Rowat 2012). This large fish is found globally in warm tropical oceans and prefers to stay within 200 meters of the ocean’s surface in waters ranging from 4.2 to 28.7 degrees Celsius (Stevens 2006). This creature can be found all across the globe in any warm tropical seas. Aggregations of whale sharks have been seen off the coast of Australia at times, although it is primarily a creature of solitude. Whale sharks are filter feeders that consume plankton as well as small fish and are harmless to humans. The whale shark is a species with a fascinating ecology, life history, behavior, anatomy