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1.1.10 The impact of human activity on coastal landscape systems
Great white sharks research paper
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Great white shark, white shark, white pointer, or
white death
The Great white shark is part of the Lamnidae family of sharks. They are warm-blooded fish that feed on things such as halibut, seals, sea lions, salmon, and tuna. They are the largest macropredatory fish. They can swim 25 mph with bursts of speed up to 35 mph. They reach maturity around 15 years old and their life span is estimated at 70 years. Sharks do not have bone which makes it difficult for scientists to determine their age.
Species- Carcharodon carcharias
Genus- Carcharodon
The latin name means “jagged-tooth one”. The sharks teeth have jagged edges. The top and bottom jaws move. They have 5 rows of teeth and can have up to 3,000 teeth. They never run out of teeth because once one falls out another one comes in.
Coastal surfaces in all the major oceans
Almost all off shore waters
Water can be as shallow as 3 feet
Temperature is between 54-75 degrees Fahrenheit
Humans are the only threat that these sharks have. There are accidental deaths of sharks by fishermen. Humans will also try to catch sharks and sell their fins for soup. Some people hunt sharks to display their jaws as trophies. Some sharks also get caught in nets that are placed in the water to prevent the sharks from getting too close to where people are swimming.
The oceans have become polluted with toxins, garbage, and metals. Sometimes, sharks will eat the garbage and it will build up in their bodies and harm them. In some areas the Great white shark population has decreased to 70%.
They live in the coastlines of South Africa, Australia, New Zealand, California, Alaska, Hawaii, most of South Aerica, Mediterranean Sea, West Africa to Scandinavia, Japan, eastern coastline of Chi...
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...during global warming where the water levels are decreasing due to heat. The Great white shark has the ability to adjust its body temperature in cold waters only. They are unable to adjust their body temperature to make it colder if the water is too warm. The shark will need to migrate to an area where the water has better temperature. The rise in sea temperature will result in a decrease in oxygen in the water.
With water levels decreasing this will cause the sharks food source to die or migrate to areas as well. This will cause the sharks to migrate they will need to migrate to areas with more food. They will need to travel further and further to find what they need especially since the sharks have a big appetite.
The sharks may need to depend even more on their senses they have. They will have to rely more on their sharp sense of smell to detect food supply
Sharks have also been subjected to medical research, games and competitions, jewellery, souvenirs and cosmetics. We need to take into consideration that sharks play a vital role in the natural world that we live in. it is imperative that we look after these majestic creatures and ensure they remain protected. We need to be aware of the dangers of sharks, swim in protected areas where there are shark nets, and do not swim after dark in the sea (especially not alone) as the sea is the sharks home. Humans should also be wearing wet suits as protection in the ocean. The sea is where they live, they swim freely and they eat – they do not particularly target humans but rather prey on food that is available to them in their habitat.
So why do we need sharks? Well, Sharks help keep the ocean healthy and clean for over 450 million years. They also help remove half of the worlds green house gases and produces oxygen more than all of the rainforest's combined! Sharks are just as important as all the trees in the world because they have one thing in common, provide us with oxygen. Without the sharks help we wouldn't be able to get rid as much of the greenhouse gases as we want to, which means global warming would have a lower rate of happening faster. Most importantly they provide us with food. How? They would usually eat the old, sick or slower fish in the population of the ocean to the right size so the prey species don't cause harm to ecosystem by becoming to populated. They are also at the top of the food web. If all the sharks went extinct the entire food web would collapse causing many other species of fish to disappear. So instead of killing the sharks, we could lure them away to somewhere else. As they have a huge impact to the environment.
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.
As they are at the top of the food chain, sharks play a very important role in the oceans in a way that an average fish does not. Sharks keep populations of other fish healthy and in proper proportion for their ecosystem. By preying on the old, sick or slower fish in a population, they prevent the spread of disease and prevent outbreaks that could be devastating. According to Ransom Myers from Shark savers, “sharks may be gone within the next decades if we continue to kill them, resulting in the loss of important foods that we depend on for survival, causing a marine ecosystem imbalance.” At the same time, I accept that shark nets could be useful, especially in shark infested areas that have been renowned as spots where many attacks have occurred, but I still believe, as you would, that scientists should spend more resources on working out why it is becoming more common for sharks to be entering shallower waters, looking for food – namely seals, who just happen to look like
The bull shark may be responsible for many shark attacks in the world but I believe that we have no right to kill them. Sharks are very important to animals food cycles and if the food cycles get messed up it can greatly effect the world. In fact, the bull shark is more vulnerable to human impact due to their ability to live in fresh and salt water but many sharks that are killed are for either shark fin soup or their liver oil. The sharks liver oil has many uses now but it started as a machine lubricant. Another way that sharks die is by recreational fishing. The sharks can get caught up in the fishermen's nets and eventually suffocate and die. As an environmental community, I feel like we need to inform people about shark habits and how to keep sharks safe. The water is their home and we are
Torres states they environment they live in,biology,height,and weight. There are marine ofcourse, in deep water in 34s-47s,deep range 25-950m,usually 100 -600m. They feed on shellfish,worms,small fish and crustacean it’s what they feed them self with. Their length could be up to 96.0 cm it’s a common length,55.0cm tall it’s also a common height. Ghost sharks are usually in New Zealand and Australia . The author conclusion Ghost sharks are a very stable sharks that live in the deep sea,go for easier pray and it’s common pray.
Information (sub-point): Shark finning also has also drastically negatively affected the entire shark population. According to SharkSavers.org, “Shark populations face the threat of extinction in every part of the world primarily due to overfishing driven by the high demand for shark fins” (SharkSavers, 2013). It is also found that the global shark population has decreased by a drastic 90% over the last 50 years, and if change does not occur quickly, the entire shark population could potentially disappear
Sharks appear to be very vicious creatures that will eat or kill anything in its path. People think that all sharks are harmful and deadly to humans. However, research shows that this statement is not true. Sharks can be trained and tamed. They are just like big, aquatic dogs. Only about 2 dozen types of sharks are potentially harmful to humans. Shark attacks are also much more uncommon than one may think. Despite their fearsome appearances, sharks are not as vicious as they look.
Sharks kill an average of about 12 humans per year. Humans kill an average of about 11,417 sharks per hour. Unfortunately, that number may not stop growing unless action is taken. Shark slaughter is becoming an ever expanding issue that could have devastating effects if it is not stopped. As a result of a tremendous increase of demand in shark fins in recent years, sharks are being finned and thrown back into the water where they are left to suffer an excruciating death which can take days to occur. Not only is the act cruel, but it also disrupts the natural ecosystem and may cause irreparable damage. Due to all of these effects, shark slaughter needs to be stopped, sooner than later.
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.
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
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