Free Essay

Sharks

In: Science

Submitted By senecasolt
Words 2299
Pages 10
Endangered Sharks
Rapidly declining shark populations has already been noticed and will continue to decline unless further steps are taken to ensure their protection as endangered species. 50 out of 307 shark species, listed by the International Union for Conservation of Nature (IUCN), are either vulnerable, endangered or critically endangered. However, of those 50, only three, the White, Whale, and Basking sharks are protected internationally under CITES. CITES is the Convention on International Trade in Endangered Species. Sharks as a whole, represent the highest percentage of threatened marine species listed on the IUCN Red List of threatened species. Some well-known species that are endangered are Hammerheads, Tiger Sharks, Whale Sharks, Great White Sharks, Shortfin Mako Shark, and many tropical reef sharks. The decrease of shark populations has already had devastating effects on local coastal communities.
Two of the world’s largest fish are on the endangered list. The Whale Shark is listed as vulnerable for extinction. They migrate seasonally and are targeted by commercial fisheries. Whale sharks feed on krill and plankton so they do not harm humans, the most harm one could face would be to get struck by its massive caudal, tail, fin. Whale Sharks are beneficial to many tropical reef areas. In addition, the Basking Shark is also listed as vulnerable. These are the second largest living fish left. They are found in all the worlds’ temperate oceans and are a harmless, slow moving, filter feeder just like the Whale Shark. Basking Sharks have a very unique mouth cavity and is a sight to see. They are commercially fished for food, fins, animal feed, and their liver oil. Even peaceful, non-threatening shark species are at risk of extinction because of human greed.
Reasons for Declining Populations
Sharks have been around since the time of dinosaurs and survived that mass extinction, yet it has come to the overexploitation by humans, that is bringing their populations down. Sharks are already prone to being vulnerable since they are late-maturing animals and give birth to only a few young, but humans have been more than harmful to their populations. The main threat is overfishing and over-consumption of their meat, fins, and cartilage. Even if it’s not posted, most seafood is mislabeled due to being harvested unsustainably or fraud, so it may not be posted that you’re eating shark, but it could be. Typically, the only part of a shark that is harvested is their fins. The sharks’ fins are harvested for Asian cultures for traditions such as shark fin soup. “Finning” refers to catching sharks and slicing off their fins while the shark is still alive, and then tossing the rest of their body back into the ocean. With no fins, the shark cannot swim to breathe or eat and dies slowly. Sadly, this harvesting of their fins is devastating, “killing an estimated 100 million or more sharks globally per year” (“Why Are Sharks Endangered”). Shark fin soup if the most expensive seafood product by weight, and is creating huge incentive for fishermen to hunt sharks, solely for their fins (“SeaStewards.org”). According to “Stop Shark Finning,” three sharks are being killed every second so people can use their fins to make shark fin soup. The shark fin itself is tasteless and just provides a broth for this Asian delicacy. The over-consumption of sharks fins is having a huge impact on them.
Bycatch also poses a great threat to shark populations. Bycatch is the unintentional capture of non-targeted species. Certain types of fishing are more harmful to shark populations than others, such as long-lining. Long-lining is where long fishing lines of monofilament are baited every 30 meters or so and catch whatever bites. These have been described as a “curtain of death” because they catch way more than just the targeted species of fish. Another cause of the decline of shark populations are effects from climate change, pollution, and destruction of natural areas causing habitat degradation when sharks depend on healthy ecosystems to thrive. Even if we are not intentionally harvesting sharks, humans are still responsible for accidentally catching them and degrading their habitats.
As a side problem of overharvesting sharks, they are becoming significantly smaller because they are not being given time to mature to their full size. These populations will be hard to rebuild, even if we stop the problem now, because the sharks take a long time to mature reproducitvly and typically only raise one or two pups a year.
Misconceptions
Many misconceptions about sharks have led to the decrease in their populations as well. For instance, it was thought that shark cartilage cured cancer. After further research, it has been found that this is false. Many believed that sharks could not get cancer because they have a low incidence of cancer rates, nonetheless sharks still do develop cancer and tumors. The misconception that shark cartilage extracts were a cure for cancer only caused a severe decline in shark populations and a diversion for patients from other cancer treatments. (“SeaStewards.org”)
Apex Predators
Since sharks are the “top-dogs” of the oceans, they play a key role in maintaining marine ecosystems balance. Their populations serve as an indicator of ocean health, so if sharks populations are poor then it is safe to assume many other marine species populations are not doing well either. The loss of the apex predator of our seas will have devastating consequences for the marine ecosystems. I understand that many people fear sharks because of their reputation, but they are a species that are necessary in our oceans to maintain a greater balance in the ecosystem. These sharks have a bad reputation due to movies and news but people still fail to see the big picture, we enter their domain when we go into the oceans. When we’re on land, we are the top predators, but when we enter their waters, it’s free reign. No one has ever been attacked by a shark when they were on land so if they are that opposed to sharks, then the solution is simple, don’t go into the oceans. It is not fair to label a creature as a monster or anything else cruel because we intrude on their territory.

Consequences of Shark Extinction
With sharks being the top apex predator of the sea, there will be a ripple effect if they become extinct. We have already seen in certain areas where large shark species populations have dropped that shellfish populations have declined also, causing the water quality to become reduced because shellfish filter water. As for the small shark species, their populations will increase rapidly and consume smaller marine life at an unsustainable rate. Each animal has a specific niche it fills and if sharks are out of the picture then what will other marine life species adapt to fulfill. Sharks have an influence over other organisms causing them to alter their behavior or niches to avoid being eaten. The oceans rely on a stable shark population to maintain balance.
Another consequence of shark species extinction would be a higher death rate of other marine life. For the most part, sharks feed on weak or wounded animals. This takes the sick creatures out of healthy populations. Without the sharks, then the other species populations would decline also because the illnesses would spread throughout the healthy population. Additionally, the sharks maintain a balance by eating middle-level predators, so they prevent smaller marine life species from becoming prey to an abundance of middle-level predators. This could in turn create problems for fishermen and people that rely on fish as a food source because middle-level predators will thrive and consume anything in their path. A big problem that is definitely not in the forefront of this is that sharks help the creation of oxygen in a sense. By them maintaining a balance in the food chain, they ensure that phytoplankton in the oceans are not depleted. Without sharks, phytoplankton populations would crash by being consumed by other marine life, and they will not be able to participate in photosynthesis and create needed oxygen anymore. All marine life is intertwined and effected by the shark population.
Global Actions
Oceana is a leading organization in protecting the world’s oceans. Currently, they are working internationally to protect declining shark populations and restoring others. They have been working in the United States to promote legislation that bans shark finning. The U.S. passed the Shark Conservation Act in December 2010, banning shark finning in our waters and solidifying the United States’ role as a leader in shark conservation. Oceana is mainly trying to raise awareness to the importance of sharks in our saltwater ecosystems. In January 2009, the Spanish government committed to ban the catching of certain species of sharks and regulating the catch of others. This is very beneficial because Spain is one of the largest shark catching and exporting countries on the planet. Chile also faces the forefront of shark conservation by passing a ban on shark finning like the United States. As of May 2012, 23 Mediterranean countries banned the shark finning, prohibit trawling in certain areas, and require countries to collect and report data on catches of some threatened species. Nearby in Europe, they approved a ban on shark finning, which is a great achievement because Europe is the world’s largest exporter of shark fins to Asian countries. With the aid of Oceana, the worlds sharks will benefit from future legislation and actions.
United States Actions
The United States has had major roles in aiding shark survival. In December 2007, the Vermont Country Store stopped selling a skin enhancer that contained shark squalene. This squalene is naturally occuring by sharks in their livers to help regulate their buoyancy, but has been recently harvested by humans for selfish reasons. Many products, including lip-gloss or anti-aging cream contain squalene from sharks. There are alternative sources to extract squalene so fortunately some products have stopped using it and switched to other sources. As of September 2011, California Senate banned the sale, trade, possession, and distribution of shark fins. By them doing so, it completed the West Coast ban, along with Washington, Oregon, Hawaii, Guam, and the Commonwealth of Northern Mariana Islands, on trading shark fins. In July 2012, Illinois became the first inland state to ban the trade of shark fins. Additionally, in September 2012, the West Coast population of Great White Sharks has been considered to be listed on the Endangered Species Act. Though it is still being analyzed, this is a step in the right direction for preserving these magnificent creatures. It appears that shark preservation has become more prevalent and supported in the last few years.
Ways You Can Help
Sharks play an important role economically, not ust environmentally. Sure, the fishing companies make money from harvesting their fins for shark fin soup, but other companies can earn much more money than that from sharks, without even harming them. Encouraging tourism is the solution. People will pay to go diving with sharks. South Africa is known for cage diving with Great White Sharks. In addition, people like to travel and dive in colorful reefs and if the sharks are gone then the colorful reefs will diminish. Sharks are worth more alive than they are dead. We need to establish global protection for these animals. Many coastal regions can help preserve shark species. One example is to boycott any restaurant that serves shark meat or shark fin. In addition, to refuse to buy a product made of shark squalene can save the sharks futures. If less people are requesting and buying shark products, then fewer sharks will be harmed.
Anyone can help save the shark populations in many ways. One can donate or volunteer with many conservation or activist groups helping to preserve sharks. Additionally, one can sign petitions to help put bills and legislation in act to congress. People can also participate in things such as Swim For the Sharks event. Personally, the best way to get more people invested in preserving sharks existence is educating them on all their benefits in the ecosystem and showing that they are not dangerous eating machines, but a prime example of evolution at its best. Educating people to not fear them or hunt them could be a key role in saving their future.
Works Cited
"Doesn’t Shark Cartilage Cure Cancer? | SeaStewards.org." SeaStewards.org. N.p., n.d. Web. 6 Dec. 2012. <http://seastewards.org/shark-finning/doesn%e2%80%99t-shark-cartilage-cure-cancer/>.
Richard, Michael Graham. "10 Amazing but Endangered Shark Species: How Many Do You Know? : TreeHugger." TreeHugger. MNN Holdings, 15 Aug. 2012. Web. 7 Dec. 2012. <http://www.treehugger.com/ocean-conservation/10-amazing-endangered-shark-species-how-many-do-you-know.html>.
Schiffman, David. ""Sharks Create Oxygen": A Sciencific Perspective." Southern Fried Science. Wordpress & Atahualpa, 10 Feb. 2012. Web. 7 Dec. 2012. <www.southernfriedscience.com/?p=12692>.
"Shark Week : Ask A Conservation Expert: Discovery Channel." Discovery Channel : Science, History, Space, Tech, Sharks, News!. N.p., n.d. Web. 7 Dec. 2012. <http://dsc.discovery.com/convergence/sharkweek/expert/expert.html>.
"Sharks: Overview." Oceana. N.p., n.d. Web. 7 Dec. 2012. <http://oceana.org/en/our-work/protect-marine-wildlife/sharks/overview>.
"Sharks: Victories." Oceana. N.p., n.d. Web. 7 Dec. 2012. <http://oceana.org/en/our-work/protect-marine-wildlife/sharks/victories>.
"What is shark finning?." STOP SHARK FINNING. N.p., n.d. Web. 7 Dec. 2012. <http://www.stopsharkfinning.net/shark-finning.htm>.
"Why Are Sharks Endangered." seeSHARKS. N.p., n.d. Web. 6 Dec. 2012. <http://www.seethewild.org/15/shark-threats.html>.…...

Similar Documents

Premium Essay

Shark Corporation

...Discussion Board 3 Jenni Buckner Liberty University Acct 612: Tax Research & Jurisprudence Professor Janet Forney November 22, 2012 One of my clients, Shark Corporation is trying to make as much money on a transaction. They are selling a building that has some substantial hidden damage. The Shark Corporation wants me to tell the client there is no damage to the building. This raises some ethical dilemmas when practicing as a professional, especially as a CPA. A CPA has many tasks including “continuing responsibility to improve the art of accounting, maintain the public’s confidence, and carry out the profession’s special responsibilities for self-governance” (Colsen, 2004, p. 80). If I have already told the other side that the building is fine and find out after there is damage, I would contact the party and relay the message to them. As a CPA, we must understand that as a professional “we must consider the interests of governmental bodies, credit grantors, stockholders, partners and proprietors, public investors, and the public-at-large” (Dixon, 1975, p. 21). Professional CPAs need to uphold their reputations in order to ensure future success. This scenario brings many ethical issues about as a professional. The first is the ethical dilemma with withholding the information. The next is not being completely honest with the second party. As a CPA, it is critical for us to understand that we need to keep the client happy but we should not break any......

Words: 538 - Pages: 3

Free Essay

Shark Finning

...Shark Finning in Hong Kong: What are the social and economic factors of shark finning in Hong Kong and how will it have an affect on the remaining population of sharks? Victoria Abstract The rapid economic growth in Hong Kong over the past few decades has had an immense effect on the amount of shark finning taking place. With GDP steadily increasing the recent change in the spending patters has only contributed to an overuse of this resource. The pricing patters of this product show that as long as fishing remains economically viable sharks will continue to be at risk of extinction. There has been a lack of motivation to raise awareness on this topic and as long as fishing remains economically viable it will just continue to occur. To reduce the amount of shark finning in Hong Kong we need to enact more ant-finning regulations. Keywords: finning, Hong Kong, disposable income What are the social and economic factors of shark finning in Hong Kong and how will it have an affect on the remaining population of sharks? Shark fins are a valuable product and a delicacy to people in Hong Kong and many other surrounding populations that are heavily Chinese, but this overfishing has led to a major depletion of the shark species. Although several countries have made the effort to ban shark fishing, if it continues to happen at the current rate there will be a risk of extinction. Hong Kong has only increased their amount of shark fishing because of the recent growth and......

Words: 1462 - Pages: 6

Premium Essay

Shark Finning

...What is Shark Finning? Why is it such a vicious practice and why do people do it? Shark Finning is an atrocious practice of cutting off the shark’s fins and tossing the shark, still alive, back to the water; this practice is illegal but it is practiced anyways and it’s quite serious as some shark are in the edge of extinction. Once the fins have been cut off, the shark is thrown back to the water and it slowly dies. The shark may either drown, bleed to death or be eaten by other creatures. The shark can’t move or defend itself because it has no fins so it just sinks to the button of the sea; helpless. Shark finning is one of the most monstrous things you can do to an innocent animal. It’s like cutting a person’s hands and legs and leaving them alone. The person is vulnerable and defenceless. It’s such an evil practice to perform because the creature suffers and dies in pain. Some people wonder why the fishers toss the finless shark to the water as it’s really heartless to leave an animal to die like that. The fishers try to avoid paying for the fish because they are charged for every kilogram they bring in the boat. Shark meat is rarely eaten and therefore it’s very cheap. Fisher men care for the fins as they are expensive and light. The fishers would have had a loss if they brought the whole shark with them and that is why the toss the finless shark back to the sea. The shark eventually dies in a really cruel way and the fisher earns quite a lot of money for......

Words: 1375 - Pages: 6

Free Essay

Shark Tank

...Conan Chan 9/16/12 1. Who are the sharks? * Barbara Corcoran. She specializes in real estate. Her strengths and skills including having good people skills, enjoying her business, being creative, and taking risks on her investments and decision. * Daymond John. He specializes in fashion. He has a creative vision and understands the importance of fresh perspective. His public confidence is also top notch. * Robert Herjavec. He specializes in technology. He values pure hard work and intuition. He is also a best selling uthoer and has unlimited dreams due to his "rgs to riches" background. * Kevin O'Leary AKA Mr. Wonderful. He specializes in education software. He is a self-proclaimed eco-preneur who makes money, but environmentally friendly investments. He loves to take control and has a take-no-prisoners, cost cutting style. * Mark Cuban. He specializes in Media and Sports. HE has exceptional leadership. He works twice s hard as any other person. He is able to make sacrifices. He has strong dedication, honesty and commitment. 2. Pick 3 of the sharks. For each of the three you choose, report on one deal in which they invested. 1. Barbara Corcoran. The entrepreneurs are Erika Welsh and Keeley Tillotson and their product is Wild Squirrel Nut Butter. They have sold thousands of jars on website for a 14k gross and 7k profit. The original deal offered was 50k for 10% stake. The final deal was 50k for 40%. After Shark Tank, the women moved their business......

Words: 665 - Pages: 3

Free Essay

Sharks

...Bloodthirsty, ruthless, killer: shark. For years people have feared and slaughtered sharks because of the bad rap they have received from Hollywood, but these beliefs are not justified. Sharks are not vicious and are actually quite gentle. Of the more than 388 species of sharks only two (the Great White and the Tiger) have been known to attack man and then only because of mistaken identity. Wetsuits and surfboards used by surfers are mistaken by sharks as the thick, rubbery, skin of seals, which are their main diet. Once the shark bites the surfer, it almost immediately lets go because it does not taste like its favorite meal. Not all big sharks have huge jaws full of teeth, as many people believe. Whale sharks, the largest fish in the world, are the most affable creatures you will encounter in our world's oceans. These sharks (that can weigh over three thousand pounds and grow up to five stories in length) have no teeth at all. Instead they have a mouth full of baleen that they use to filter plankton and tiny fish out the hundreds of gallons of sea water that passes through their monstrous mouths at one time. These peaceful giants have been known to let divers ride on their backs and don't show any aggression when approached. People should treat sharks with respect, as they should all earth's creatures. The only way for future generations to learn to appreciate these magnificent creatures (instead of fear them) is through education. This can be accomplished through...

Words: 292 - Pages: 2

Free Essay

Basking Sharks

...Basking Shark In the midst of all the masters of the sea, comes an enormous atrocious sea creature. It is known for being the second largest species of sharks in the world and also a fascinating monstrosity. Cetorhinus Maximus, also known as Basking sharks are fierce yet bizarre lethargic sharks. They are known for their gigantic mouths and unique appearance, which sets them apart, and additionally are quite impressive. According to “The Shark side of Life” it states that, “These sharks can grow to lengths of over 35 feet (10 meters), thus making them the second largest fish in the ocean ("The Shark side of the World ").” Due to their colossal appearance, this particular shark has few enemies. Basking sharks are very independent and known to depart from their mothers once born. They are ovoviviparous which is a form of reproduction where the eggs are internally fertilized as well as hatched within the female bearer which she gives birthed to fully young sharks. In addition to their eccentric process of reproduction, Basking sharks are oophagous, which means that the mother produces infertile eggs to nurture the fertile eggs, as a source of food. According to Sharks Trust, it states “Gestation periods of 1–3.5 years have been proposed though this figure has recently been revised to around 14 months. Estimates of the size at birth range from 1–1.7m, making Basking Shark pups larger at birth than the majority of other sharks are when fully grown ("Shark Trust ").” This......

Words: 1495 - Pages: 6

Premium Essay

Sharks

...Running head: Sharks Sharks T Tolerico Marine Biology Doctor Cameron Guenther Sharks What do you think of when you hear the word “Shark”? Do you think of the lion of the ocean or perhaps God’s perfect predator/scavenger? Perhaps you think of the movie “JAWS”? Most people will think of the movie “JAWS” and think killer, attacker, and predator. However, are sharks really preying on humans? I view sharks as God’s perfect predator and scavenger. Sharks, like lions, weed out the sick and slow fish to keep the population strong. They also scavenge on the bottom of the ocean any carcasses that settle there. The attacks on humans are more likely the shark “tasting” to see if the movement is a fish. When the shark realizes that the human is not its prey, they move away. Sharks can be found all over the world’s seas, from the equator to polar regions. We are currently aware of about 480 species and there are still species to discover. Some species, known as benthic, dwell mainly on the ocean floor. An example of a benthic is the nurse shark or ray shark. They scour the ocean floor for food. Other species are known as pelagic, meaning they spend much of their time navigating the open seas. Most of the species that we are familiar with are pelagic. Some species even inhabit rivers and lakes. The Bull shark can migrate into rivers and lakes. One important feature of sharks is that they are made up of cartilage not bone. There has been research done on shark......

Words: 2370 - Pages: 10

Free Essay

Sharks

...Shark Killing and the Ecosystem Introduction Sharks are fascinating creatures that come in all sizes and live in water all over the world. Arguably, these creatures play a very imperative responsibility in the ocean that a fish cannot. Apparently, sharks are the top food providers in the ocean almost in every part of the world. In this case, they assist in keeping the inhabitants of other fish species healthy and in suitable proportion for their ecosystem. However, shark population faces the threat of extinction in almost all parts of the world due to overfishing. Fishers us a technique called Bycatch, a process in which marine mammals or species of fish are unintentionally, caught while fishing for a specific target. Irrespective of the initiatives and laws put in place for overfishing, fishers have continued to hunt sharks for the fin soup, which is in high demand than their meat. On the other hand shark cartilage and shark liver oil are sold as cures for the hosts of aliments. Due to this disparity between meat and fins, it has led to a horrific practice of shark fining. As a result, there is need to create awareness on the importance of sharks in all parts of the world in order to save ocean ecosystem from extinction. Catching Techniques Many fishing techniques and gear are no selective and result in catching and discarding millions of marine life that is not always the target species. Most of the fishing methods like the long line typically are used to catch tuna.......

Words: 2124 - Pages: 9

Premium Essay

Shark Finning

...Shark Finning Shark finning is the practice of slicing off the shark's fins while the shark is still alive and throwing the rest of its body back into the ocean where it can take days to die what must be an agonising death. Some sharks starve to death, others are slowly eaten by other fish, and some drown, because sharks need to keep moving to force water through their gills for oxygen. Shark fins are used as the principal ingredient of shark fin soup, an Asian "delicacy". Demand for shark fin soup has rocketed in recent years due to the increased prosperity of China and other countries in the Far East. Shark fin soup, which can easily cost $100 a bowl, is often served at wedding celebrations so that the hosts can impress their guests with their affluence. Because there is such a high demand for shark fins, traders can make a lot of money from shark fin, but it is the restaurant owners who really "make a killing" in this foul trade. Fishermen are only interested in the fins because shark meat is of low economical value and takes up too much space in the hold. It also contains urea, which turns to ammonia once the shark has died and contaminates other fish. Shark fin itself is tasteless; it just provides a gelatinous bulk for the soup which is flavoured with chicken or other stock. Many people, especially the consumers, are unaware of the suffering that finning causes. To put it bluntly, shark populations have been decimated. Globally, tens of millions of sharks are......

Words: 780 - Pages: 4

Free Essay

Sharks

...Sharks One of the most feared predators of the ocean are the sharks, with more than 465 known species of sharks living in our ocean today. They are very popular animals with movies such as Jaws and Deep Blue Sea, these animals are also dedicated a whole week on animal planet they are often categorized as monstrous savages who just attack any and everything. In fact that isn’t a true reputation of them. These animals are survivors and have been around for a long time. These fascinating creatures have caught the eye and imagination of so many people as well as me. There are many things I want to cover over today just to give a better understanding and idea of sharks. Sharks are very smart creatures so its no surprise to learn they have plenty of ways in effective forms of communication. Eventhough sharks are generally loners, so they aren’t in groups. This makes it harder for scientist to observe how they actually communicate with each other than with other animals that live in the water. They have an amazing sense of hearing which is believed most likely to be how they communicate majority of the time. They can hear sounds at very low frequencies so a great part of it won’t even be picked up during the test observations. Sharks also use their hearing to allow them to pick up vibrations and electrical currents from other sharks in the water with them. Most of the communication among sharks involves aggression. They will fight each other not for territory but for food. For...

Words: 2560 - Pages: 11

Free Essay

Shark Finning

...SHARK FINNING 1 Shark fining; little is known about this controversial issue. We see sharks in movies, Horror flicks where everyone dies from shark attacks, and News broadcasts of shark attacks and fatalities. With all this propaganda, who cares if they fin them for food, right? Fining: the practice of removing the fins of a shark and dumping its carcass back into the ocean is a wasteful and unsportsmanlike practice that could lead to over fishing of shark resources. That is one of the points that are the sense of the Congress taken from the 106th congress 1st session. Is this any better than what early frontiersmen did? Skinning the buffalo and just leaving the skinned carcass to rot and be wasted? Hundreds of millions of sharks are killed each year only for their fins. Not using the rest of the shark carcass to its fullest potential is unsportsmanlike and wasteful. Shark fin soup, shark fin stew, these are delicacies. They are not a necessity to live and yet the demand is high. They are eaten primarily for the taste of the dish. Must we wait till they become and endangered species before we do something about it? The green sea turtles were killed for their shells and flesh nearly to extinction before we even started to try to stop the killing. Foods like this are not necessarily bad, but we must do it in moderation. Don’t have another green sea turtle event. If there is something good, do you use it up till it’s all gone? Once it’s gone no one will be able to......

Words: 407 - Pages: 2

Free Essay

Sharks

...Are sharks perfectly adapted predators? This essay will discuss how sharks are thought to be one of the most perfectly adapted predators in the ocean food chain due to their physiology and interactions with their environment. However we must not disregard the fact that there are many species of sharks which may possess different features meaning that only certain species may be considered ‘perfectly adapted’. It is thought that sharks have been around for around 400 million years, in which they quickly evolved to the environment they live in. The sharks we see today are believed to be the result of evolution that took place 100 million years ago, making them largely unchanged over this time period. The most recently evolved sharks are the sphyrnids (hammerhead sharks) and the carcharhinids (requiem sharks). Although the reason behind why these sharks have survived could be due to early adaptation to their ecological role, we must consider those species of sharks that are now extinct and understand why certain species adapted quicker than others. Sharks main defining feature is their cartilaginous skeleton, placing them in the class Chondrichthyes, which is thought to make up only 1% of living fishes. By having cartilage as opposed to a bony skeleton they are lighter and more flexible in the water, as well as the cartilage strengthening the body frame of the shark. This class of fish are commonly known for their paired fins, paired nostrils and jaws and can then be......

Words: 1460 - Pages: 6

Premium Essay

Shark Finning

...Who is involved in shark finning, and where? Finning occurs worldwide and is most common in high seas fisheries, hundreds of miles out to sea. Oceanic fishing fleets target valuable fish such as tuna, using thousands of baited hooks on miles of long-line, and freezing their catch onboard. Unfortunately, long-liners often catch several times as many sharks than they do tuna. Until relatively recently, this shark 'bycatch' was considered a nuisance, and sharks were cut loose and allowed to swim away. However, as shark fins have become increasingly valuable, fewer sharks are being released. Bycatch is often not officially landed at ports, therefore data on the extent of the trade are limited. Traditionally Hong Kong was the centre for shark fin imports, however the economic rise of China has seen an increase in imports through mainland routes making accurate tracking of trade in shark fins more difficult. (We can mention Taiwan too) In small inshore fisheries in tropical countries, sun-drying of fins requires minimal technology and artisanal fishermen are encouraged by shark fin-traders to target local populations of sharks. As a result, even coastal shark populations in the remotest parts of the world are now vulnerable to over-exploitation, and rapid depletion of local shark populations often results from such trading activity. * Finning occurs worldwide and is most common in high seas fisheries * Bycatch is often not officially landed at ports *......

Words: 265 - Pages: 2

Premium Essay

Shark

...shark tank assignment #1 by Cristian Pacheco 1. Select an episode of “Shark Tank” and watch the episode. You may watch an episode that has aired for this year, or you may watch an upcoming episode. Answer: The episode I watched is the number 305 Air Date: Friday, March 09, 2012 . 2. You are to select one of the segments, which is funded by the Sharks to research. Answer: In the second segment of the show, four entrepreneurs the Nardo’s brothers Dj Nardo, Kyle Nardo, Danny Nardo and Kj Nardo bring up their company “Nardo’s Natural” to the Shark Tank looking for help because the demand they had for the product was more then what they could produced they needed it $75.000.00 and they were offering 25% of their company in exchange, until Barbara Corcoran made an offer of $75.000.00 for 50% of the company, the brothers accepted the offer so Barbara become part of the company. 3. You are to visit the company web site and look for answers to any of the following questions: a. Does the company mention on their site the show “Shark Tank”. b. What type of sales or distribution does the company have? c. Will the funding from Shark Tank help the company grow? Answer: (A) In the web-side for this company www.nardosnatural.com the show is mention as a opportunity of a business to star or grow, they have offers related to the TV show but the don’t mention how much money they......

Words: 508 - Pages: 3

Premium Essay

Sharks

...in so many shapes and kinds as the shark. The earliest evidences of sharks are isolated spines, teeth and scales that appeared about 430 million years ago in the Silurian Period, known as the "Age of Fishes". Sharks have a sleek, streamlined design which helps them swim without using up a lot of energy.They certainly need to conserve their energy because they never really sleep and most of them never stop swimming. Some sharks are fierce predators, and would be happy to eat you if they encountered you. Almost any shark six feet or longer is a potential danger, but three species have been identified repeatedly in attacks: the Great White Shark, the Tiger Shark and the Bull Shark . All three live world wide, reach large sizes and eat large prey such as marine mammals or sea turtles. But most sharks never grow longer than five feet and never even see anyone with legs and arms anyway. People kill thousands more sharks every year than sharks kill people. Sharks take about as long to mature as we do. Some of them become adults in their teens. A mother shark carries her babies inside her body while they develop, sometimes for more than a year. Even so, some sharks are born inside an egg which they have to crack open. They spend early portions of their lives in nursery grounds. Some of the advantages sharks have over people is that they keep growing new teeth, they don't have breakable bones, and they are not prone to get cancer. Sometimes sharks are referred to as swimming......

Words: 869 - Pages: 4

Magnet link | Capture One Pro 6 Windows | Adjektive (Möbel, Menschen A1.1)