Sunday, July 29, 2012

Great White Shark

Great white sharks are found mainly in sea macropredator being and ocean climate, but Great White Shark may also occasionally enter tropical waters. This is especially the epipelagic residents, which means that it can usually be found in the top layer of the sea, usually between the sea surface and thermocline at a depth of about 200 meters. The Great White Shark is known but sometimes traveling as far as 250 meters. It can be found in surfline or in waters far from the beach. The Great White Shark found from coastal islands where the water is deep and shallow beach located near one another, and reef fish can be found off the coast.

Great White Shark is actually not just white. Above, their color varies from almost black to gray while the ventral surface white or whitish. Pelvic fins can be seen with olive and gray. In strong sun light, can display a lateral surface of the colored almost shimmering bronze. The area surrounding the gill opening, and a base of fins often blotched. The same thing also happened with the small, black spots or irregular dark on posterior side of the fifth gill opening. Great White Sharks have each individual coloring and pattern, but there are also similarities district. For example, Great White Sharks off Cape Province in South Africa more generally shows shades of olive, while the Great White Shark off California in the United States has a gray coloration is very dark. Great White Sharks in the Mediterranean Sea are usually olive-brown or gray.

There is always a lot of speculation about the maximum size of the White Shark. Unconfirmed sources claimed that the Great White Shark she looks more than 7 meters outside Kangarro Island in Australia in 1987. In the same year, the female shark from Malta reported 713 centimeters. In October 1998, however, examined photos of this shark and shark turned out to be more than 530 centimeters. Many members believe that the Great White Shark maximum length is somewhere around 6 meters. The smallest adult Great White Sharks are found in the wild is about 120 centimeters. We still do not know for certain length at maturity for the Great White Shark, and it is possible that different people mature at different distances. But we know that Great White sharks are often adult females when they are between 450 and 500 centimeters, and that male Great White Shark often adults when they are around 350 centimeters. A study conducted at the Great White Shark 21 shows that they are mature when they were around 10-12 years, but this is only a single study in quite a few individuals and should not be used to make general assumptions.

The Great White Shark has a conical nozzle, the shape is quite blunt. Teeth large, triangular-shaped and rough sawn timber placed in patterns like. Their latin name, Carcharodon carcharias, actually means "jagged-toothed One '. The Great White Shark is equipped with five gill slits. Characteristics of first dorsal fin is almost an equilateral triangle, with the margin slightly concave back. At a very young individuals, the first dorsal fin rounded at the apex, and grew pointier first two years. Second dorsal fin is always very small in the Great White Shark. Caudal fin is crescent shaped, and the Great White Shark is bigger than 2.0 meters usually have a pointed tip acute. In the newborn sharks, the lower surface of the tail is generally more compact and rounded. This area but will be expanding very soon after birth and will look like the surface of the tail of the Great White Shark adult.

Great White Shark Carcharodon genus belonging to the famous and near relatives are four other mackerel shark family Lamnidae. Many historians agree that when Aristotle and other Greek writers write about "the monster Lamia scary" they are referring to animals that now we call the Great White Shark. Lamia Lamie name and is still used in the Mediterranean a few, like the Greeks and the language of southern France. During the 16th century naturalist Guillaume Rondelet suggest that perhaps the prophet Jonah in the Bible is not swallowed by a whale, but with the Great White Shark. Just like today, the Great White Shark feared and admired good and is surrounded by many rumors. Historically, the Great White Shark has been known by several different names. Always only be one of the recognized species of the white shark, but has been called Squalus carcharias, blood drinking carcharias, carcharias verus, Carcharodon rondeletii, Squalus carcharias and Carcharodon smithii. Today, the formal Latin name Carcharodon carcharias, which means a jagged-toothed.

Detailed knowledge of the Great White Shark breeding habits are rare, but at least increased rapidly over the last few years. Previously, most of the ideas and advice on Great White Shark reproduction is based on comparison with other related species of shark known to the scientific community. There is one report from 1937 about the arrest of pregnant sharks three years earlier, but was not sure whether this is the Great White Shark or some other species. It was not until 1980 that a more detailed study of pregnant white sharks occur. Verified reports talking about 5 to 10 embryos, but there are also unconfirmed reports that about 14 embryos. Female sharks do not develop the placenta, and embryos are not protected by the use of eggs without fertilization (oophagy). Embryos also swallow his own tooth warehouse; possible to re-use of calcium and other minerals, but is yet to be confirmed. Time of pregnancy is unknown, but estimated at around 12 months. Births may occur in temperate waters off the shelf from spring to late summer. A Great White Shark of a newborn is between 120 and 150 centimeters.

The kopulasi actually have not seen, but the curious behavior of the surface by the Great White Shark may be part of the mating ritual has been observed. Mating rituals for other species of sharks, often including biting and holding the tooth, and bite marks were found on the pectoral, pelvic, and dorsum of female White Shark that shows that this may be part of their mating ritual as well. Great White Shark large adults of both sexes and their offspring have been seen together in certain regions around the world, which probably means that this district nursing policy for the Great White Shark. Examples of these areas are the waters around Japan, South and East Australia, New Zeeland, Eastern Cape Province in South Africa, Southern California and Baha in the U.S. and South-Central Mediterranean Sea (especially between Tunisia and Western Sicily). Quite Great White Shark older, but still less than one year old, was arrested outside Algeria, North Aegean and Mediterranean France.

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