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”.
Hypothesis: I will learn more about great white sharks Taxonomy The Great White Shark or Animalia Chordata Vertebrata Chrondrichthyes Elasmobranchii Lamniformes Lamnidae Carchardon C. carcharias is a marine predator. Carolus Linnaeus gave the shark it's first scientific name, Squalus carcharias in 1758. Later it was given its current name Carchardon C. carcharias by Sir Andrew Smith.
When the word Shark comes to mind most people think of a monster that feeds on humans and is an enemy of all living beings. Contrary to popular belief less than 10 percent of sharks are known to attack humans unprovoked. Sharks are classified under the class of Chondrichthyes, which is fish that have characteristics of a skeleton made of cartilage, jaws, paired fins, and paired nostrils. The superorders are divided into two groups, which are Batoidea that have rays and their relatives and Selachii, which are sharks. Scientists have found isolated spines, teeth, and scales that appeared 350 to 400 million years ago in the Devonian Period known as "Age of Fishes". Most modern sharks have evolved 100 million years ago when dinosaurs lived on earth. (Matthews, 1989) Sharks have been known to inhabit tropical and temperate seas as well as some cold and polar seas. Migration of sharks is poorly understood due to not all species migrating. And in the species that do migrate the distance may be short or long and is based on availability of the food and environmental cycles. One American biologist Eugenie Clark is the world leader in shark study, she was the first person to learn how sharks behaved in captivity and how well sharks had the ability to understand.
The Great White Shark Beginning with the simplest one-celled organism, an extraordinary animal rose in the murky waters entitled to a non-comparable killing-eating machine. This organism has become nature’s most genuine and most successful creature that it has remained unchanged for over 250 million years. Nature finally invented the perfect king of the sea. This animal has given the sea it’s “living” adjective; in turn, it was entitled—the “great white shark.” The Great White Shark derived from a series of evolutionary advancements that took several billion years.
Cold Blooded Killers Sharks: Man-eating, stealthy, carnivorous creatures that roam the ocean. What could possibly come in the way of such beasts? Certainly puny humans could not interfere with these brutes. Or could we? It is estimated that over one hundred million sharks are killed each year (Why Are Sharks Endangered).
The Greenland Shark Sharks live in almost every part of the oceans, from coastal environments to deep-sea habitats. They also live in the warm waters of the tropics to the cold frigid waters of the polar region. The Greenland shark, also known as “somniousus Microcephalus,” lives in the dark, cold waters of the North Atlantic (I 65). The Greenland shark belongs to the order Squaliforms, more usually known as dogfish sharks. There are 70 species in this order, which includes the spied sharks, spiny dogfish, Sleeper sharks and lantern fish (I 50).
See P. E. Pope, A Dictionary of Sharks (1973); T. H. Lineaweaker and R. H. Backus, The Natural History of Sharks (1970, repr. 1986); J. A. Musick and B. McMillan, The Shark Chronicles (2002). The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.
In recent years the ocean’s top predator is dancing on the brink of mass extinction mainly due to overfishing, finning practices, and weak or nonexistent regulation policies. While sharks kill only a few people per year, humans kill around 100 million sharks per year. In 2014 the International Union for Conservation of Nature released a report stating that more than 30 percent of the 64 species of sharks and rays are threatened and 24% are near-threatened with extinction. The iconic and feared great white is included in that 30
Malia Lee Marine Biology Mr. Girod April 28, 2014 The Bull Shark The Carcharhinus leucas commonly called the "bull shark" is a very unique shark. The bull shark can live in both salt water and fresh water but is commonly found along the Mississippi River and around Nicaragua. The bull sharks has a very blunt rounded nose giving it a bullish type of appearance thus giving it the name bull shark. The sharks are a dark black to a light grey with a white underbelly.
In Chinese tradition, Shark fin soup is called as “a celebration soup”, which people eat it to celebrate in various occasions. Moreover, people also believed that shark fin consisted of diverse nutrition values which provide them virility, wealth, and power(Wolchover, 2011). These beliefs lead to the beginning of poaching for sharks, the top of food chain in the sea world. Surprisingly, although people are aware of the decreasing number of sharks since the old days, around hundred million of sharks are still hunted each year(Heltus, 2013), to be served on luxury tables surrounded by those believers in things that they do not even prove whether the belief is reliable. Therefore, in the generation that people are mostly educated, sharks should no longer have to be continuously killed for their fins.