Sperm whale population graph

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Sperm whales are the largest of the toothed whales and have one of the widest global distributions of any marine mammal species. They are found in all deep oceans, from the equator to the edge of the pack ice in the Arctic and Antarctic. They are named after the waxy substance, spermaceti, found in their heads.

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From an initial focus on sperm whales Physeter macrocephalus and right whales Eubalaena spp. Extensive records of American whaling in the form of daily entries in whaling voyage logbooks contain a great deal of information about where and when the whalemen found whales. We plotted daily locations where the several species of whales were observed, both those caught and those sighted but not caught, on world maps to illustrate the spatial and temporal distribution of both American whaling activity and the whales.

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It is the only living member of the genus Physeter and one of three extant species in the sperm whale familyalong with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic mammal with a worldwide range, and will migrate seasonally for feeding and breeding. The females cooperate to protect and nurse their young. Females give birth every four to 20 years, and care for the calves for more than a decade.

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All rights reserved. Sperm whales' heads are filled with a mysterious substance called spermaceti. Scientists have yet to understand its function, but believe it may help the animal regulate its buoyancy.

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Their sheer size amazes us: the blue whale can reach lengths of more than feet and weigh up to tons—as much as 33 elephants. Despite living in the water, whales breathe air. And like humans, they are warm-blooded mammals who nurse their young.

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Gray whales are medium sized whales, reaching up to 45 feet 14 m in length, with the females usually being larger than the males. They are gray with white patches, which mostly consist of areas where barnacles and lice have attached themselves to the whales. In fact, they carry over pounds of barnacles and whale lice.

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Gustavo Toledo; Alfredo Langguth. E-mail: gustavoact yahoo. The data come from the log books of the whaling ships and from the spreadsheets containing biological information filled out by employees of the SUDEPE at the flensing plan of the whaling station. A total of sperm whales were killed in this period.

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The inspiration for the white whale of Moby Dick, sperm whales have the largest heads, biggest brains, and make the loudest sound of any animal on Earth. Region: Arctic. Destinations: Lofoten, Greenland, Svalbard, Iceland.

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Other than the occasional threats these whales face by humans they are also at risk of being harmed or killed by chemical pollution, noise pollution sonar and other man-made sounds fishing nets and collisions with ships. The sperm whale is one the deepest diving marine mammal known to mankind and the spermaceti oil may be the reason this whale is able to dive to such depths when it is searching for food. Another common explanation used by researchers is that the spermaceti oil acts like an acoustic tuning fork by allowing the sperm whale to maximize the use of its echolocation by changing the fluid density in its head.

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