Sunday, July 29, 2012
Great White Shark
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.
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.