Common Dolphin


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Common Dolphin

 

(Delphinus delphis), a mammal of the Delphinidae family belonging to the Odontoceti suborder. Body length, up to 2.5 m. The upper part of the body and head are blackish, and the belly and sides are white (hence the name in Russian of belobochka, white-side). The dorsal and pectoral fins are sickle-shaped. The nose is narrow, long, and beak-shaped. The teeth are small and numerous (up to 240). The common dolphin is widely distributed in seas of the equatorial and temperate zones; it lives in the open sea. It feeds on anchovies, sprats, herring, capelin, and other small fish living in the upper layers of the seas. It congregates in schools which number up to several thousand individuals. In the Black Sea the common dolphin mates in July and August, and the gestation period lasts from ten to 11 months. Usually the female bears one young, whose body length is about 90 cm.

The common dolphin is a commercial fish; its fat and skin are used. The numbers of common dolphin have fallen sharply; only Turkey hunts it commercially. The USSR and Bulgaria have forbidden the commercial catching of dolphins for a ten-year period beginning in 1966.

REFERENCES

Kleinenberg, S. E. Mlekopitaiushchie Chernogo i Azovskogo morei. Moscow, 1956.
Tomilin, A. G. Kitoobraznye. Vol. 9 of the series Zveri SSSR i prilezhashchikh stran. Moscow, 1957.
Tomilin, A. G. Kitoobraznye fauny morei SSSR. Moscow, 1962.
References in periodicals archive ?
Abundance of the long-beaked common dolphin (Delphinus capensis) in California and western Baja California waters estimated from a 2009 ship-based line-transect survey.
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Three different models were used for common dolphins: both species of common dolphin in a single combined category, short-beaked common dolphin, and long-beaked common dolphin.
In July a common dolphin was found on Ventry strand in Kerry.
Species 1984-85 1985-86 1987-88 1992-93 Minke whale 12 4 (3) 1 (1) Blue whale 1 (1) Common dolphin 1 6 (5) 16 (13) Risso's dolphin 5 12 (11) Northern right 1 (1) whale dolphin Pacific white- 1 (1) sided dolphin Humpback whale 1 (1) Killer whale 4 Dall's porpoise Harbor porpoise 1 (1) Bottlenose dolphin 2 (2) Unidentified dolphins 2 4 28 (18) 5 (5) Unidentified whales 2 (1) 3 (3) Total 3 25 42 (29) 42 (38) Species 1993-94 Jan.
Being the only hunters that occur in numbers intelligent enough to anticipate the behaviour of the sardines, the common dolphin is the true architect of the sardine run.
It is important to note that on mainland Portugal, the harbour porpoise is also known as "toninha" which is a name used in the Azores for many dolphins, especially the common dolphin Delphinus delphis.
The growing number of common dolphin, much more closely associated with the south west coast, is seen as further evidence of change.
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The short-beaked common dolphin was filmed repeatedly leaping almost four metres out of the water near Worm's Head on the Gower coast on Friday.
RESEARCHERS are to investigate why common dolphin sightings off western Scotland have almost doubled.