Odontoceti

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Odontoceti

[ō‚dänt·ə′sē‚tī]
(vertebrate zoology)
The toothed whales, a suborder of cetacean mammals distinguished by a single blowhole.

Odontoceti

 

(toothed whales), a suborder of aquatic mammals of the order Cetacea. The body of a toothed whale is 1.2–20 m long. In distinction to Mysticeti, it has from two to 240 teeth. There is one nasal opening at the top of the head. The lower jaws are shorter than the skull and are joined in front. Toothed whales orient themselves mainly by means of echolocation. The formation of the echolocation apparatus, with its system of air sacs, has caused skull asymmetry in toothed whales. They have highly developed hearing, and a sound signal and voice organ linked with the nasal passage. Toothed whales live in all seas and oceans. The suborder Odontoceti comprises four families: Physeteridae (two species: sperm whale and pygmy sperm whale), Platanistidae (four species), Ziphiidae (17 species), and Delphinidae (50 species). The waters of the USSR contain 23 species (belonging to 20 genera). Toothed whales reach sexual maturity between two and six years of age. Their food consists offish, cephalopod mollusks, and crustaceans. The most important for man are the sperm whale, bottle-nosed dolphin, common dolphin, harbor porpoise, white whale (beluga), killer whale, and blackfish. They are sought for industrial oil, spermaceti, and meat. The number of many species has sharply decreased, and some Odontoceti species have been placed under protection.

REFERENCES

Tomilin, A. G. Kitoobramye. Moscow, 1957. (Zveri SSSR i prilezhashchikh stran, vol. 9.)
Tomilin, A. G. Kitoobraznye fanny morel SSSR. Moscow, 1962.
Zhizn’ ihivotnykh, vol. 6. Moscow, 1971.

A. G. TOMLIN

References in periodicals archive ?
During the survey, 23 cetacean species (17 odontocetes and 6 mysticetes) were seen, and abundance was estimated for 19 of them (15 odontocetes and 4 mysticetes).
Many cetaceans, especially odontocetes, are highly sociable within their respective species and form pods.
Inter-specific behavioral interactions between large whales and small odontocetes are rarely described and little understood.
Stabilization mechanism in swimming odontocete cetaceans by phased movements.
Findings from this research may also be used to predict the effects of climate-induced ecosystem changes on other Arctic odontocetes, such as narwhals (Monodon monoceros) and sea-ice associated marine mammals.
Radio-telemetric studies of two species of small odontocete cetaceans.
Pelagic odontocetes The distribution of pelagic odontocete strandings is likely influenced by the narrow shelf and proximity of the Gulf Stream to the coast (Cione et al.
Barnes (1998) reported that locality IGM 92 has yielded the remains of mysticete and odontocete whales, and locality IGM 93 has yielded mysticete whales and a possible odobenine walrus.
Intraspecific scarring in odontocete cetaceans: An indicator of male 'quality' in aggressive social interactions?
1959) and two odontocete species: Pacific white-sided dolphins, Lagenorhynchus obliquidens, and Dall's porpoise, Phocoenoides dalli (Fig.