Kamis, 23 Mei 2013

Sperm Whale


The Biggest Animals Kingdom and in The World | Sperm Whale | The sperm whale is the largest toothed whale with adult males of up to 20.5 meters (67 feet) in length and weighing up to 57,000 kg (56 ton long, 63 short tons). In contrast, the second largest toothed whale peak Baird measured 12.8 meters (42 feet) and weigh up to 15 short tons (14,000 kg). The Nantucket Whaling Museum is about 5.5 meters (18 feet) in length of the mandible. The museum claims the individual was 80 feet (24 m) long, the whale that sank the Essex (one of the incidents behind Moby-Dick) claimed that about 85 feet (26 m). Today, people are usually not more than 18.3 meters (60 feet) long and 51 000 kg (50 long tons; 56 short tons) in weight says another view that the exploitation by overwhaling almost no effect on the size of the bull sperm whales, and the size may actually have increased in modern times, on the basis of the density-dependent effects And "one of the sexually dimorfisch of all cetaceans. At birth both sexes are almost the same size, but adult males are usually 30% to 50% longer and three times larger than females Single body of the sperm whale is unlikely to be confused with other species

The sperm whale flukes are triangular and very thick. The whale light its wing begins high above the water as the immersion nutrition. In contrast to the smooth skin of most large whales back skin folds and usually compared to a passing whale watching enthusiasts. The sperm whale has a lower encephalization quotient many other whale and dolphin species, lower than monkeys and much lower than in humans.  Sperm whale is the largest brain of all mammals, both in absolute and relative terms. The olfactory system is reduced, suggesting that the sperm whale has a poor sense of smell and taste. The pyramidal tract is underdeveloped, reducing the limbs The sperm whale is one of the most cosmopolitan species. Preferably ice-free waters over 1000 meters (3300 feet) deep, although both sexes by the temperate and tropical oceans and seas, only adult males populate higher latitudes.

Tickets low for both the Black Sea and the Red Sea can be used to explain their absence., the lower layers are also Black Sea anoxic and contains high concentrations of sulfur compounds such as hydrogen sulfide. Coastal areas with significant sperm whale populations include the Azores and the Caribbean island of Dominica. Sexually mature females give birth once every 4-20 years (pregnancy rate at the time of whaling). Like other whales, whale milk has a higher fat content than terrestrial mammals approximately 36%, compared with 4% in cow's milk. Has an energy content of about 3840 kcal / kg (16,070 kJ / kg), compared with only 640 kcal / kg (2700 kJ / kg) in cow's milk. Suckling calves of women who are not their mother. Males reach sexual maturity at the age of 18. After reaching sexual maturity, males move to higher latitudes where the water is colder and feeding is more productive. Women remain at lower latitudes. A 2008 study published in the journal Current Biology, shows evidence that whales can sleep with both sides of the brain. It seems that some whales around 7 percent of the time, most of the time between 06:00 and midnight clock fall into a deep sleep. 

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