08/July/2010 Sharks have been in existence for more than 300 million years. Their evolution occurred over 150 million years earlier than that of the dinosaurs. Most of the existing fossil data of early sharks was collected from fossilized teeth together with several skin impressions. primitive sharks (Cladodonts) ‚ had teeth which were double-pointed‚ up to 2metres in length‚ ate fish as well as crustaceans‚ and existed approximately 360 million years ago. The earliest shark-like beings shown
Premium English language Health care Marketing
Tiger Sharks Rosalani and Romina Mr. Wiscott Modern Hawaiian History May 17‚ 2002 The tiger shark‚ Galeocerdo cuvier‚ is a large (up to 18ft) predator found in tropical and subtropical waters world wide. Tiger sharks are one of the three main shark species known to attack humans‚ and are responsible for most shark attacks in Hawaii. Less than one shark attack occurs per year on average in Hawaii (compared to an annual average of 40 thousand drowning) and mosts attacks are non-fatal
Premium Shark attack Shark
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
Premium Shark Overfishing Fish
that considered a problem in which sharks face regarding humanity killing off their population. After a thorough analysis‚ the simplistic approach of the advertisement makes it highly effective in informing its viewers that humans have an impact on the ecosystem around them without ever explicitly saying it. Taking a first glimpse at the chosen advertisement‚ it is clear that there are two panels‚ one with a shark fin in the ocean‚ and one without the shark fin. It seems that nothing necessarily
Premium Endangered species Shark Natural environment
essay on shark finning Issues surrounding shark finning can never be over analysed. At first glance shark finning may seem unenchanting‚ however its study is a necessity for any one wishing to intellectually advance beyond their childhood. While it has been acknowledged that it has an important part to play in the development of man‚ spasmodically it returns to create a new passion amongst those who study its history. It is an unfortunate consequence of our civilizations history that shark finning
Premium Politics Economics Odysseus
Book Report I chose “The Shark And The Goldfish” by Jon Gordon for my book report. This book is about positive ways to thrive during waves of change and follows a goldfish named Gordy who washes out into the ocean. Gordy has always been taken care of and fed daily‚ but doesn’t know how to act or get food when he is in the ocean. He meets a nice shark named Sammy who teaches him how to find food and take care of himself. The story is a lesson for how you never know what life is going to throw
Premium Fish 2007 singles Shark
Should we eat sharks’ fins? Shark’s fin soup is a delicacy which is enjoyed by many people around the world‚ especially the Chinese as they believe that it symbolizes wealth‚ honour and respect. However‚ the practice of cutting off sharks’ fins alive and then throwing them back into the sea had caused increasing awareness and ire of animal rights and environment advocates. Statistics have estimated that one hundred million sharks are killed every year‚ not considering the fact that these numbers
Premium Nervous system Central nervous system Environmentalism
Dog Fish Shark Dogfish sharks are the second largest sharks‚ there body shape is rounded. Dogfish sharks have a variety of different parts. Smell‚ taste‚ hearing‚ sight‚ touch‚ and electroreception are six sensory systems that sharks use. All of there senses allow them to explore the environment and survive. There senses help them locate prey‚ avoid danger‚ and also find mates. Sharks nostrils or nares are under the edge of there snout. There nares are separate from there mouth and throat‚ they
Premium Fish anatomy Shark Liver
The Sea The Tiger shark‚ also known as the “wastebasket of the sea”(National Geographic)‚ is the fourth largest predatory shark in the ocean‚ measuring between twenty and twenty five feet long and can weigh more than 2000 pounds. They have dark‚ vertical stripes on their bodies which is the reason they are named tiger sharks. According to National Geographic‚ these stripes fade lighter as the shark grows older‚ and eventually disappears with age. The head of the tiger shark is somewhat wedge-shaped
Premium Shark Great white shark Attack
great white shark veraciously attacks him. This is what comes to mind when most people think of sharks‚ but they are not really just man-eating monsters of the sea. Sharks are a fascinating group of fishes that strike fear into the minds of humans‚ but they are nothing to be afraid of. There are over 475 different species of sharks‚ but only a few of these are considered to be dangerous to people. These include Great White Sharks‚ Tiger Sharks‚ and Bull Sharks. Most species of sharks do not even
Premium Shark Ocean Great white shark