Rutilus


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Rutilus

 

a genus of fishes of the family Cyprinidae. There are about ten species, distributed in Europe and in western and northern Asia. The USSR has two species: the vyrezub (R. frissi) and the roach (R. rutilus). The latter is distributed everywhere except the Kolyma River and the Asian portion of the basin of the Pacific Ocean. The body, which is covered with large scales, reaches 25 cm in length and 200 g in weight. There are many freshwater, resident, and semimigratory subspecies. Rutilus feeds on plants, plankton, and benthos. Sexual maturity is attained in the third or fourth year. The females deposit as many as 100,000 eggs in April or May on the previous year’s vegetation. The males have breeding coloration. Rutilus has local commercial significance. The numbers of some commercial subspecies (R. r. aralensis, R. r. heckeli) are noticeably decreasing, and they urgently need protection.

References in periodicals archive ?
The presence of Petromyzon marinus observed at the station AmoA (upstream of Aissi Wadi) and Rutilus rutilus--Alburnus alburnus, identified in two types of environments (Watercourse and dam), typical of watercourses in particular Aissi Wadi, can be interpreted as a residue of the species initially present in the rivers before the construction of the Taksebt dam.
Relationships of the redback vole Clethrionomys rutilus (Pallas) in North America: Karyotypes of the subspecies dawsoni and albiventer.
Toxorhynchites rutilus septentrionalis was found regularly in small numbers (0.
2009: Comparative studies on four calcified structures for age determination of roach Rutilus rulilus in Ulungur Lake, Xin Jiang Uigur autonomous region, China.
The effects of winter food addition on the population dynamics of Clethrionomys rutilus.
Myodes rutilus exhibits a signal of recent expansion through Beringia similar to S.
Some observations of spawning by roach, Rutilus rutilus L.
However, an exception to this pattern has been reported for meadow voles (Microtus pennsylvanicus, Clethrionomys rutilus and Clethrionomys rufocanus).