Whales Statues

Whales Statues

Whales Statues

Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. They are an informal grouping within the infraorder Cetacea, which usually excludes dolphins and porpoises. Whales, dolphins and porpoises belong to the order Cetartiodactyla, which consists of even-toed ungulates. Their closest non-cetacean living relatives are the hippopotamuses, from which they and other cetaceans diverged about 54 million years ago. The 2 parvorders of whales, baleen whales (Mysticeti) and toothed whales (Odontoceti), are thought to have had their last common ancestor around 34 million years ago. Whales consist of 8 extant families: Balaenopteridae (the rorquals), Balaenidae (right whales), Cetotheriidae (the pygmy right whale), Eschrichtiidae (the grey whale), Monodontidae (belugas and narwhals), Physeteridae (the sperm whale), Kogiidae (the dwarf and pygmy sperm whale), and Ziphiidae (the beaked whales). Whales are fully aquatic, open-ocean creatures, they can feed, mate, give birth, suckle and raise their young at sea.

Whales range in size from the 2.6 metres (8.5 ft) and 135 kilograms (298 lb) dwarf sperm whale to the 29.9 metres (98 ft) and 190 metric tons (210 short tons) Blue Whale, which is the largest known creature that has ever lived. The sperm whale is the largest toothed predator on earth. Several whale species exhibit sexual dimorphism, in that the females are larger than males. Baleen whales have no teeth, instead they have plates of baleen, fringe-like structures that enable them to expel the huge mouthfuls of water they take in, while retaining the krill and plankton they feed on. Because their heads are enormous, making up as much as 40% of their total body mass, and they have throat pleats that enable then to expand their mouths, they are able to take huge quantities of water into their mouth at a time. Baleen whales also have a well developed sense of smell. Toothed whales, in contrast, have conical teeth adapted to catching fish or squid. They also have such keen hearing, whether above or below the surface of the water, that some can survive even if they are blind. Some species, such as Sperm Whales, are particularly well adapted for diving to great depths to catch squid and other favoured prey.

Whales evolved from land-living mammals, and must regularly surface to breathe air, although they can remain under water for long periods of time. Some species, such as the sperm whale can stay underwater for up to 90 minutes. They have blowholes (modified nostrils) located on top of their heads, through which air is taken in and expelled. They are warm-blooded, and have a layer of fat, or blubber, under the skin. With streamlined fusiform bodies and 2 limbs that are modified into flippers, whales can travel at speeds of up to 20 knots / 37 km/h, though they are not as flexible or agile as seals. Whales produce a great variety of vocalizations, notably the extended songs of the humpback whale. Although whales are widespread, most species prefer the colder waters of the northern and southern hemispheres, and migrate to the equator to give birth. Species such as Humpbacks and Blue Whales are capable of travelling thousands of miles without feeding. Males typically mate with multiple females every year, but females only mate every 2 to 3 years. Calves are typically born in the spring and summer, females bear all the responsibility for raising them. Mothers in some species fast and nurse their young for 1 to 2 years.

Once relentlessly hunted for their products, whales are now protected by international law. The North Atlantic right whales nearly became extinct in the 20th century, with a population low of 450, and the North Pacific Grey Whale population is ranked critically endangered by the IUCN. Besides the threat from whalers, they also face threats from bycatch and marine pollution. The meat, blubber and baleen of whales have traditionally been used by indigenous peoples of the Arctic. Whales have been depicted in various cultures worldwide, notably by the Inuit and the coastal peoples of Vietnam and Ghana, who sometimes hold whale funerals. Whales occasionally feature in literature and film. A famous example is The Great White Whale in Herman Melville’s novel Moby Dick. Small whales, such as Belugas, are sometimes kept in captivity and trained to perform tricks, but breeding success has been poor and the animals often die within a few months of capture. Whale watching has become a form of tourism around the world. The word “whale” comes from the Old English hwæl, from Proto-Germanic hwalaz, from Proto Indo European (s)kwal-o-, meaning “large sea fish“.

The Proto-Germanic hwalaz is also the source of Old Saxon hwal, Old Norse hvalr, hvalfiskr, Swedish val, Middle Dutch wal, walvisc, Dutch walvis, Old High German wal. The obsolete “whalefish” has a similar derivation, indicating a time when whales were thought to be fish. Other archaic English forms include wal, wale, whal, whalle, whaille, wheal. The term “whale” is sometimes used interchangeably with dolphins and porpoises, acting as a synonym for Cetacea. 6 species of dolphins have the word “whale” in their name, collectively known as blackfish, the killer whale, the melon-headed whale, the pygmy killer whale, the false killer whale, and the 2 species of pilot whales, all of which are classified under the family Delphinidae (Oceanic Dolphins). Each species has a different reason for it, for example, the killer whale was named Ballena Asesina by Spanish sailors. The term “Great Whales” covers those currently regulated by the International Whaling Commission, the Odontoceti family Physeteridae (sperm whales), and the Mysticeti families Balaenidae (right and bowhead whales), Eschrichtiidae (grey whales), and some of the Balaenopteridae.


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Whales Statues


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