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Informative papers on sharks
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Sharks Sharks are one of the most feared carnivores in the sea. There are 365 species of of sharks in the sea as we know today. All sharks are carnivores. Most of them eat live fish, including other sharks. A shark's most common natural enemy is an another shark. Most sharks eat their prey whole, or they tear off large chunks of the bodies. Some sharks crush their prey. Others take out small pieces off flesh from large fish. Sharks also feed on dead or dying animals. Sharks have the reputation of attacking human beings. But less than 100 shark attacks a year are reported throughout the world. Sharks are most common in warm seas and oceans. Whale sharks, are the largest shark known to man. Sharks are classified in the order Selachii, which belongs to a larger class of fish called Elasmobranchi. The earliest shark-like vertebrate fossils are from the Devonian Period of the Paleozoic Era. Some kinds of sharks live in the depths of the ocean. The smallest streamlined, black and white shark of the genus Squaliolus can grow to be up to 6 inches long and the female can grow to be up to 8 inches. They can grow up to 40 feet long. They are also known to weigh over 15 tons. The smallest sharks known at a full stage of growth may measure about 6 inches long and weigh about 1 ounce. Sharks live in many places throughout the ocean. Some sharks are known to be found near the surface of the water because the temperature of the water is warmer. Yet, some sharks are known to dwell on the bottom of the ocean. These sharks are sometimes referred to as bottom dwellers. A few species of sharks enter rivers and lakes where they can move to the seas and oceans easily. Sharks have a boneless skeleton made of a substance called car... ... middle of paper ... .... 4. Sharks eat far less than most people imagine. Cold-blooded animals have a much lower metabolism than warm-blooded animals. A shark eats about 1% to 10% of its total body weight each week. Studies on sharks in the wild show similar food intake. 5. Only 32 shark species have ever been known to attack people. Like other wild animals, most sharks would rather avoid you. Sharks that have attacked, probably mistook people for food or may have attacked to protect their territory. Bibliography: Refrences All About Sharks 3-15 Http://www.aj.com/main/metaanswer.asp?metaEngine=directhit&origin Encyclopedia Americana- School's Version 3-30 SHARKS!- 2-18 A Web Site with many new facts and information. Http://www.sharks.com/info McMillian's Animal Kingdom 3-26 P.145-149 Discover Channel Online www.discoveryonline.com/sharkcam
Low oxygen consumption rates were reported in this study, most likely due to the low standard metabolic rates of the nurse sharks. Nurse sharks also had a lower routine metabolic rate compared to other species, which was attributed to their slower swimming speeds. Metabolic rate increased with temperature. The cost of transport was lower than is found in other species. This was attributed to the nurse sharks inactivity and less streamlined body.
head of a hammer. Their eyes and nostrils are at the ends of the hammer. There
’’They are gray-brown to olive-green on top with off-white undersides,and they have heavily serrated,triangular teeth’’(National Geographic ‘’Hammerhead Sharks’’ 1).These are the usual colors of sharks. When you visualize a shark,the shark you would see would most likely resemble a bull shark. ’’They they almost resemble tiger sharks,and the problem is that tiger sharks are even more dangerous than bull sharks. To be honest,if you have to be extremely afraid of one species of shark,then it would probably be the bull shark. ’’Among the most likely sharks to attack humans,bull sharks favor shallow coastal waters-the same places humans prefer to swim’’(National Geographic ‘’Bull Shark’’ 1).This means that the bull shark would be the most feared by humans because they swim in the same places that humans swim.
But occasionally the younger sharks are preyed on by bigger sharks that do not necessarily have to be Bull sharks they can be become prey to any larger species of shark and occasionally a crocodile. However there are parasites like Pandarus sinuatus, and Periscopus dentatus that use the surface of the shark’s skin and use it to survive (Curtis). Though that does not in anyway decrease or increase the economic uses for the bull shark, its effects on the environment, or level of danger to humans. In certain places around the world the amount of bull sharks is decreasing slightly, because sharks can be harvested to make fish food, for their meat, for oils, and their fins for shark fin soup, or in asia their skin can be used to make “good leather” (“Bullshark”; Curtis). Even though their numbers are thought to be decreasing according to the International Shark Attack Files, otherwise known as the ISAF, has reported that there have been at least 70 reported unprovoked attacks on humans of which 17 were fatal, but that is only the known number of the reported attacks by bull sharks there most likely have been many more attacks that went unreported (“Bullshark”; Curtis). They are known for being one of “the most dangerous sharks in the world” because they along side the tiger shark,and great white they are the most common sharks to attack a human
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. Bull sharks can grow to be about 350 cm long and weigh around 230 kilograms. Bull sharks also tend to have smaller eyes compared to many other sharks which indicates that the bull sharks have limited vision. The bull sharks have triangular teeth like the great white shark (one of the bull sharks cousins). The bulls teeth are heavily serrated and are about 1.5 inches long which makes it easy to tear apart the flesh of their prey.
This image is what a majority of people believe to be the shark. They believe it to be the bloodthirsty sea monster that appears in countless works of literature and films, but science says otherwise. The classic picture painted by the minds of sailors returning from years at sea come from imagination and sharks’ violent methods of hunting and mating. Sharks fear humans as much as humans fear sharks, and most sharks, particularly the “man-eating” great whites, only bite humans because they mistake surfers for seals. In earlier times, the ocean was a source of mystery and adventur...
It is not hard to think of the Great White Shark as one of the most feared animals
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.
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.
To begin with, the influence of consuming shark fin is from unverifiable beliefs while this is academically proven that sharks have neurotoxins. There are many beliefs that become proven later in the later generation, but shark fin eating is yet not one of these. Conversely, instead of finding more nutrition values in sharks, a research found that shark, which some species could have 50 years or more average lifetimes, containing a large amount of poison from eating toxin-laden fish within their bodies along their lives. To illustrate, pregnant women are especially warned not to consume shark meat as mercury could cause dangerous neurological impacts on fetuses(Xu, 2013). The other types of toxin shown in a recent study by Deborah C. Mash, a researcher at the University of Miami, that 79% of shark fins high level of BMAA or Beta-methylamino-L-alanine, a harmful neurotoxin which could lead into higher risk of Alzheimer’s and other diseas...
They are creatures that have no clue what we are and are afraid of us. Every year, thousands of more people are killed by other people than by sharks; thousand more people are killed in car accidents than by sharks, and more people are killed by lightning strikes than by sharks. Each year humans kill tens of thousands of sharks, yet, there are fewer than 100 shark attacks upon humans. For example, The Great White shark also known as the man-eater, has the greatest reputation for attacking humans. Recent studies of Great Whites show that they mainly feed on sea-mammals. Seen from below the surface a person swimming with a shark looks much like a seal, with arms and legs sticking out. The shark usually surprises its victim, being a person or seal, by one massive bite, and then retreats in order to allow the victim to die before digesting the food. For this reason, many humans survived the attack of a Great White shark if they are saved before being eaten. Not only getting out of the water and be safe, but the result of loss, blood or
Portrayed by Hollywood as giant man eaters, sharks are actually amazing creatures. Sharks are not known to go out of their way to bite humans. It is the fault of movies like JAWS and Deep Blue Sea that make this terrifying notion of being eaten every time we step in the ocean. The realistic fact is that White sharks are very inquisitive creatures. They are not the vicious man killers that they are portrayed to be, but rather misunderstood majestic animals.
Cartilage makes the shark more flexible so they can move their tail faster to make them faster. Sharks also have different shapes so each type of shark is faster than the other. Sharks use their incredible speed to catch up to there food to eat it.
The morphology of whale sharks is mostly similar to aquatic fish species, but many specific traits help differentiate them from the rest. Whale sharks are the largest fish in the world and can reach a size of around 20 meters (Martins, C., and C. Knickle). This is often compared to the size of a school bus. The shark has a very large transverse mouth. They have 5 very large gill slits and have a larger first dorsal fin compared to the second one (Whale Shark). They have a distinctive spotted “checkerboard” pattern with stripes (Martins, C., and C. Knickle). It is not exactly known why they have this specific body marking. It is believed that the body markings act as a camouflage. The strange thing about whale sharks is that they have 300 rows of teeth that play no role in feeding (Martins, C., and C. Knickle).
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