All animals under go a process of constant change in their physical appearance and in their behaviour. These changes take place over millions of years and the species that survive, do so because throughout their evolution they have perfected certain strategies that have enabled them to develop more successfully in the environment they inhabit. One such case of this successful development is the great hammerhead shark.
The great hammerhead shark, also known as Sphyrna mokarran, is a pelagic shark and is found world wide in tropical warm water regions. Great hammerheads are the largest species of hammerhead shark. The great hammerhead can be distinguished from other hammerheads by the shape of its “hammer” (called the “cephalofoil”), which is wide an almost straight front margin, and by its tall, sickle-shaped first dorsal fin. (Wikipedia, 2014)
The function of the hammer is widely unknown but many theories have been put forward as to its purpose. The most popular are that it helps the great hammerhead to scan larger areas of the ocean floor for food, and it maximises the area of sensory organs known as the ampullae of Lorenzini that can detect chemical, physical and thermal changes in the water, as well as electric fields. (MarineBio.org, 2014)
The body of the great hammerhead is the biggest of the nine species of hammerhead sharks and is coloured grey-brown to olive green on top and off-white below. They have heavily serrated triangular teeth. The length of the great hammerhead can range from four to six meters and weigh between 230 to 450 kg.
The great hammerheads have spectacular vision with their eyes positioned at either end of its widely shaped head. The positioning of the eyes give the hammerhead a panoramic vision and a be...
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...er. like most pelagic sharks, the hammerhead need to keep moving not just to stay away from the bottom but also to help it breath. if a hammerhead stops swimming it will drown. the hammerheads flat head acts as a wing to keep it from the bottom.
The great hammerheads are not known to be territorial but they are instinctively going to do what they can to protect their needs.
One of the major threats to great hammerheads is due to the fishing industry. The hammerhead is prized for its fin for shark fin soup, as well as for its liver oil for vitamins, its skin for leather, and its meat for fishmeal. Catastrophic losses have occurred in the eastern Atlantic where directed fishing is unregulated.
Conclusion:
The great hammerhead is endangered due to human interaction and not due to the fault of their strategies. Their strategies didn't incorporate human interaction.
head of a hammer. Their eyes and nostrils are at the ends of the hammer. There
In warmer waters Bull Shark mating occurs year-round while mating females usually receive mating scars on their dorsum, “the back or outer surface of an organ…” (“dorsum”). They typically carry from one to thirteen pups at one time for ten to eleven months. When the female Bull Sharks gives birth it gives birth to free swimming, live young in their nursery grounds that are again, in areas with low salinity and shallow waters (Curtis). The Pups that survive will be around 56 to 81 centimeters long at birth, and grow approximately to be around 340 centimeters when fully matured (Simpfender & Burgess). Female Bull Sharks are typically larger than males when fully grown and mature; the lifespan for both males and females is around 16 years (Curtis). Females on average are around 180 to 230 centimeters long and 285 pounds, and males on average are around 157 to 226 centimeters and 209 pounds, but the biggest known Bull Shark was reported to be 11.5 feet and 500 pounds (Simpfender and Burgess; Curtis). “Bull sharks are pale to dark grey [on their dorsal, and fade] to white on their [ventral, but on] younger individuals the fins have black
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.
Mojetta wrote about prehistoric sharks, and the history of these creatures. According to Angelo Mojetta, author of Sharks, Cladoselache genus, one of the first prehistoric sharks, was buried in sediment that kept it preserved. Unlike other sharks, Cladoselache genus had a circle of tiny plates around it’s eyes for protection against it’s victim’s attempts to fight back. These sharks lived over 400 million years ago. Sharks of the past could mostly be identified by their teeth, because shark’s bodies are made of cartilage. Another shark that was focused on was called, Stethacanthus. This shark had a very unique look. Stethacanthus had a brush like decoration on the top of it’s head, and an extra fin like part that had the same bristle like decorations on it. These characteristics were thought to be used as suction cups, to hitch rides from larger fish. One of the most famous sharks that looks like an over...
There are nearly 400 different types of sharks that have been identified to this day, yet there are still new sharks being recognized every day. Atelomycterus marmoratus, also known as the coral catshark, is a member of the scyliorhinidae family, which is the largest shark family. The coral catshark belongs to the animalia kingdom, chondrichthyes class, elasmobranchii subclass, and the A. marmoratus species. Another common name for the coral catshark is the marbled catshark, which came from the original name, Scyllium Marmoratum. (Marmoratum being Latin for marbled) The life of the coral catshark is exposed and defined by looking in to the physical description, habitat and adaptations, feeding behavior, life history, and conservation status and threats.
Loggerheads are foragers; their strong jaws are beneficial to the ocean seabed. When foraging, loggerheads naturally support and aid to the underwater community (Wilson et al. 2010). While they are foraging, they tend to break up many shells. Loggerheads increase the rate at which those shells disintegrate in the benthic ecosystem. While Loggerheads excavate for their prey, they can change the seabed, which can allow nutrients to move around.
Well if you happen to have no idea or clue as into what I’m talking about, which I seriously doubt that’s would be the case. Ever saw the movie Jaws and all of the subsequent directed by Steven Spielberg, then you definitely have a great picture of what the Great Whites are and what they are capable of doing to a human and other sea animal, this also label them one of the most dangerous wild life. The Great White also goes by these other names White Pointer or White Death is from a large species of lamniform shark. If you ever trying to locate on...
...arks-world).This means that the bull shark can process freshwater and saltwater by adjusting the amount of sodium and urea it needs.This is important because this feature makes this species very special and separable from other sharks.On the other hand,hammerheads have regular shark anatomy,except for their head and mouth.’’The hammerhead`s mouth is smaller than most other large sharks and can`t open as wide’’(“Hammerhead Shark” 2).This means that everything except for the shark`s head and mouth is regular.
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.
With smiles on our faces we cast our wisely selected lures into the ocean, but we then encountered our first problem of saltwater fishing. Our lures wouldn’t sink. As soon as they hit the water, the ocean current would just buoy them to the surface and, soon after, down current into the line of a nearby fisherman. Improvising our rigs, we dug the heaviest weights out of our tackle boxes and clamped them onto our lures. Sure enough, we got our lures underwater and under control.
The bull shark is one of the terrible sharks. They weigh about 110 pound and 11.5 feet. It usually lives in America and it has 350 teeth. It has 7 rows of teeth and 7 teeth in each row. It is also called the zambezi fish and lives in shallow water. They will usually eat small fish and it can eat
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.
Most people think that sharks are large, fast-swimmers, and savage predators. This is true of some species and groups should be interested of the appealing aspects of biology found within it: all sharks have an excellent sense of smell; some can detect electrical discharges; some sharks give birth to one of the
Many people know it as the man eating shark, and some think of it to be fierce and deadly. Well all of these things are true, but people do not know the reason for all of these things and why it is so deadly. The great white is looked at as the most feared predator of man, but opinions are changing and there are some countries that are not allowing the capturing, or killing of great white sharks.