Caspian Roach

Caspian Roach

 

(Rutilus mtilus caspicus), a fish of the carp family. Inhabits the Caspian Sea, forming several populations, including the North Caspian, Kura, and Turkmen. Length reaches 30 cm but is usually 17-20 cm; weight, up to 800 g, but more often 150-200 g.

The roach travels up rivers in order to spawn, moving from the northern part of the Caspian chiefly into the Volga, and in lesser amounts into the Terek, Ural, and Emba rivers. The fish spawns in April-May, with the female laying up to 33,000 eggs. The adult Caspian roach feeds chiefly on mollusks but also on crustaceans, midge larvae, and vegetation. It is a valuable commercial fish and is consumed in salted, smoked, and sun-cured forms. The roach population has been reduced because of the disruption of breeding conditions and the deterioration of wintering and feeding conditions, caused by the drop in the Caspian Sea level.

REFERENCES

Berg, L. S. Fauna Rossii i sopredel’nykh stran, vol. 3, fasc. 1. St. Petersburg, 1912.
Berg, L. S. Ryby presnykh vod SSSR i sopredel’nykh stran, 4th ed., part 2. Moscow-Leningrad, 1949.
Monastyrskii, G. N. “Kaspiiskaia vobla.” Promyslovye ryby SSSR: Opisanie ryb. Moscow, 1949.
Vobla Severnogo Kaspiia, parts 1-2. Moscow-Leningrad, 1939-40. (Collection of articles.)
Kazancheev, E. M. Ryby Kaspiyskogo moria. Moscow, 1963.

A. A. SVETOVIDOVA

References in periodicals archive ?
Thus, 1,072.9 tons of sprat, 112.4 tons of omul, 85.4 tons of grey mullet, 82.3 tons of herring, 69.4 tons of Caspian roach, 54.7 tons of bream, 48.2 tons of carp, 30.7 tons of crucian carp, 21.2 tons of pike perch, 5 tons of sheatfish, 3.1 tons of asp and 15.2 tons of other fish were caught.
(2014) estudiaron los efectos de la vitamina C sobre la respuesta inmunologica del mucus y el comportamiento productivo del 'Caspian Roach' (Cuadro 2), aunque no encontraron diferencias en los niveles de proteina de moco en la piel.
The effects of garlic-supplemented diets on skin mucosal immune responses, stress resistance and growth performance of the Caspian roach (Rutilus rutilus) fry.
In this study, we determined changes of ionic ratios and its effect on sperm characteristics during spawning migration in the Caspian roach.
Table 1: Changes in ionic ratios of the seminal plasma of Caspian roach during the reproductive season.