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Marine Science


             creases helping the hammerhead to feed. It is also believed that the hammerhead may be able to use the Earth's magnetic field as a source for navigation. Some hammerheads migrate a lot and may rely on this built in compass sense to guide them in the open ocean. Another use for the hammer is to enhance maneuverability. The hammer's similarity to a hydrofoil seems to explain its usefulness for maneuverability and improved lift. However, this theory has not been tested. Sharks generally have a small brain in comparison to their body weight. Among sharks hammerheads have a relatively large brain-body weight ratio. Sharks differ form most other fish in several ways. Sharks have a boneless skeleton made of cartilage that is a tough elastic substance. Most sharks have a rounded body shaped like a torpedo. This shape helps them swim efficiently. Hammerheads are especially good swimmers because of the hydrodynamic function of their head. All sharks are carnivorous. Most eat live fish, including other sharks. Most sharks eat their prey whole, or tear off large chunks of flesh at a time. They also eat dying animals. Hammerheads have definite food preferences. Their elongated head may help them locate the prey they prefer. The Great Hammerhead likes to eat stingrays. This was observed when the stomach contents of a hammerhead were examined and stingray spines were found. Stingrays are usually difficult to detect because they are partially buried in the sediment. Yet, the hammerhead is capable of finding them because they can swim close to the bottom swinging their heads in a wide arc like a metal detector. Sharks reproduce internally. Unlike most fish sharks eggs are fertilized internally. The male shark has two organs called claspers which release sperm into the female where it fertilizes the egg. In many sharks the eggs hatch inside the female, and the pups are born alive. Other species of sharks lay their eggs outside.


Essays Related to Marine Science

1. History of the Marine Corps

... whether it may be through land, air, or water. In an article by the U.S Navy, Tactics is described as "the are art and science of winning engagements and battles. It includes the use of firepower and maneuver, the integration of different arms and the immediate exploitation of success to defeat the ... It takes no longer and no less than 3 months for a civilian to turn into a tactical and disciplined killing machine. Discipline is a key part of being a Marine. You cannot go to war or into a battle without a plan. You cannot just shoot anyone you see in your path. Tactics is more knowledge...

  • Word Count: 1159
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2. Interpreting science in a new way

... universe hasn't changed, but our understanding of reality has changed. For example, the earth isn't flat. Another topic he mentioned was the changing of textbooks in science. Mr. Nelson had a textbook from 1965 and it did not contain information on how earthquakes happened, the formation of volcanoes, mountains and plate tectonics. Dr ... from the mid 1600's to present. The first was a biology paradigm shift in the mid 1600's, which was the microscope. He also mentioned that science was dependent on human perception. The second was in the 1950's where Watson and Crick presented the DNA mo...

  • Word Count: 447
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3. Science Skills Study - Paper Airplanes

This study was performed to practice the different science skills, scientific methods and paper airplanes. We know about aerodynamics and the four forces that plays a part in flight which are Thrust, Lift, Drag, and Weight. Weight force comes from ... may have to do more research. My group did well together because we all understood aqua dynamics, aerodynamics, and the four force of flight prior to our past lessons in Marine Biology with Homer and Teressa. We worked together as one and we each had responsibilities during this lab investigation. Whats most important is coming to an agreement ...

  • Word Count: 762
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4. The Antarctic Continent

... major agreements: 1. The Convention on Conservation of Antarctic Fauna and Flora 1964 .(CCAFF) 2. The Convention on Conversation of Antarctic seals 1972(1978). (CCAS) 3. The Convention on the Conservation of Antarctic Marine Living Resources. 1780(1982). (CCAMLR) 4. The Convention on the Regulation of C Mineral Resource Activities 1888(Not in effect). (CRAMRA) 5. Council of Managers of National Antarctic Program. 1988. (COMNAP) ... under UN supervison & the benefits be reaped by all the cuntries. With the discovery of any important resources or the possibility of exploiting Antarctica fo...

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5. the ozone layer

... around the world met in Montreal to sign a treaty that limits the use of CFCs and halons. Soon after the minds of science gathered in Montreal, the Montreal Protocol was signed so that in developed countries the production and consumption of CFCs would be diminished by ... of lobbying. The Antartica Protocol bans mining for a minimum of 50 years and designates the whole continent and its marine ecosystem as a "natural reserve devoted to peace and science" (Greenpeace). There are many ways individuals can slow the rate of ozone depletion, through careful product purchasing of ... fragil...

  • Word Count: 2237
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6. "Sex, Drugs, Disasters and the Extinction of Dinosaurs" by S

... dinosaurs that fossils simply cannot provide. Also, as Gould points out, this theory does not take into account the extinction of several species of marine life in the same time period. He then proceeds to point out that the theory of the dinosaurs overdosing on angiosperms was mainly speculation ... to mention all of them. As with the testicular theory, the overdose theory does not take into account the extinction of several species of marine life around the same period. Finally, Gould presents the Alvarez theory of an asteroid striking Earth with such force as to create a gigantic clo...

  • Word Count: 609
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7. Reef Destruction And Conservation Efforts

... existence will be cut in half. Coral reefs are one of the most diverse and biologically productive ecosystems on earth. They are unique among marine communities. In addition to being spectacular displays of nature's creativity, coral reefs are reservoirs of biological diversity and are truly the "tropical rain ... animals, not plants and have very specific requirements for light, temperature, water clarity, salinity and oxygen. Housed in this magnificent underworld are the marine fishes, invertebrates, sea turtles and crustaceans. Both the corals and fishes are important to one another. ...

  • Word Count: 2520
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8. CFC's

... took place in September of 1987, negotiators from around the world met in Montreal to sign a treaty that limits the use of CFCs and halons. Soon after the minds of science gathered in Montreal, the Montreal Protocol was signed so that in developed countries the production and consumption of CFCs would be diminished by the year 2000. The Clean Air Act ... Protocol was finally ratified after six years of lobbying. The Antartica Protocol bans mining for a minimum of 50 years and designates the whole continent and its marine ecosystem as a "natural reserve devoted to peace and science" (Gre...

  • Word Count: 2176
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9. Eel Grass Restoration

... being completed on the massive decline of SAV in the Chesapeake Bay. One such study is being performed by the Virginia Institute of Marine Science in which aerial photographs are taken of the bay region to calculate the total coverage of the SAV. Only 11 percent of the ... adopted nutrient reduction targets, will accelerate the recovery of bay grasses to a level near pre-decline levels of the 1950's. These new science-based goals will help Chesapeake Bay partners reduce nutrient and sediment pollution entering the Bay as well as improve the quality of tributaries ... grade the water qu...

  • Word Count: 1948
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