beluga

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Related to Delphinapterus: Monodontidae, Beluga Whale

beluga

(bəlo͞o`gə) or

white whale,

small, toothed northern whalewhale,
aquatic mammal of the order Cetacea, found in all oceans of the world. Members of this order vary greatly in size and include the largest animals that have ever lived. Cetaceans never leave the water, even to give birth.
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, Delphinapterus leucas. The beluga may reach a length of 19 ft (5.8 m) and a weight of 4,400 lb (2,000 kg). It has a small, round head, with a short, broad, beaklike snout, and a flexible neck; its flippers are short, broad, and rounded, and it lacks a dorsal fin. It produces a variety of noises and is sometimes called a sea canary. The young are born with dark fur but become almost pure white in maturity. Belugas winter in the Arctic Ocean, feeding upon crustaceans, fish, and squid; they are often found in groups of several hundred individuals. They mate in spring, and in summer they enter northern rivers. The young are born after a gestation period of 14 months, one calf every second year. The beluga is hunted by the Eskimo for food and by commercial whalers for its hide, which is known as porpoise hide. Beluga is also the common name of the largest of the sturgeonssturgeon,
primitive fish of the northern regions of Europe, Asia, and North America. Unlike evolutionarily advanced fishes, it has a fine-grained hide, with very reduced scalation, a mostly cartilaginous skeleton, upturned tail fins, and a mouth set well back on the underside of
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. Beluga whales are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Mammalia, order Cetacea, family Monodontidae.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Beluga

 

(Huso huso), a valuable commercial fish of the sturgeon family.

The beluga is up to 9 m long. It weighs up to 1 ton or up to 1.5 tons in exceptional cases. The beluga is distinguished from other sturgeons by its huge crescent-shaped mouth and fused branchial membranes. Beluga live in the Caspian, Black, Azov, and Adriatic seas, from which they enter the rivers. They reach sexual maturity at 12–18 years, when they are about 2 m long. They enter the rivers for reproduction, producing from 0.5 to 5 million eggs. When beluga are in the Volga two races are distinguished: the spring beluga (which enter the river in April and spawn in May of the same year) and the winter beluga (which enter the river in the fall and spawn in the spring of the following year). The beluga fry slip out to sea, where they feed on mollusks and crustaceans. The adults feed on various fish (roach, herring, gobies, anchovies, Black Sea haddock, and others).

The roe of the beluga is larger than that of other sturgeons and is used mainly in the manufacture of soft caviar. The number of beluga has been sharply reduced by the destruction of the conditions for their reproduction by construction of a series of hydroelectrical projects, as well as by the pollution of rivers with industrial waste.

REFERENCES

Berg, L. S. Ryby presnykh vod SSSR i sopredel’nykh stran, 4th ed., part 1. Moscow-Leningrad, 1948.
Promyslovye ryby SSSR: Opisanie ryb. Moscow, 1949. [Text and atlas.]
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

beluga

1. a large white sturgeon, Acipenser (or Huso) huso, of the Black and Caspian Seas: a source of caviar and isinglass
2. another name for white whale
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Two cetacean species, bowhead whales (Balaena mysticetus) and beluga whales (Delphinapterus leucas), occur regularly in the Beaufort Sea from midspring through early fall, migrating to the region to feed in areas that overlap with offshore oil and gas development.
Abundance of belugas, Delphinapterus leucas, in Cook Inlet, Alaska, 1994-2000.
Ungulates (artiodactyls and perissodactyls) were identified as producers, whereas neither dolphins nor white whales (Delphinapterus) emitted methane (Table 1).
For example, National Marine Fisheries Service scientists are presently using both nuclear and mitochondrial DNA to examine population structure in white whales (Delphinapterus leucas), harbor seals (Phoca vitulina), spinner dolphins, and other species.
Maktaaq, the skin of beluga (Delphinapterus leucas, Linnaeus, 1758), bowhead (Balaena mysticetus, Linnaeus, 1758), and narwhal, is a nutritious, highly valued food, and consumption of maktaaq provides a link between present-day hunting, historical activities of Inuit, and the cultural values connecting them (Freeman et al., 1998).
Beluga, Delphinapterus leucas, ethogram: A tool for Cook Inlet beluga conservation?
"Chemical Characterization of the Oligosaccharides in Beluga (Delphinapterus leucas) and Minke Whale (Balaenoptera acutorostrata) Milk."
Identification of the novel cyclo-aliphatic brominated flame retardant 1,2-dibromo-4-(1,2-dibromoethyl)cyclohexane in Canadian Arctic beluga (Delphinapterus leucas).
Gray whale barnacles Cryptolepas rhachianecti infest white whales, Delphinapterus leucas, housed in San Diego Bay.
We have cloned full-length carboxylase homologs from the beluga whale (Delphinapterus leucas), the toadfish (Opsanus tau), and cone snail (Conus textile) in order to compare these structures to the known bovine, human, rat, and mouse cDNA sequences.