Chondrostoma


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Chondrostoma

 

a genus of fishes of the family Cyprinidae. There are 18 species, distributed in the freshwaters of Europe and Southwest Asia. The USSR has five species, the most common being C. nasus. The body length reaches 50 cm, and the weight 1.5 kg. C. nasus is distributed in Central European rivers that empty into the North and Baltic seas; it is also encountered in the basins of the Black and Caspian seas. It is typically a benthic shoal fish. The fish is found mainly in rivers; it is rarely encountered in lakes. It feeds on fouling vegetable organisms, which it scrapes off stones with its lower lip. Sexual maturity is attained in the third or fourth year. In April or May, in a rapid current, the fish deposits 12,000 sticky roe among stones. The males have brilliant breeding colors. Chondrostoma are of minor commercial value. Their numbers in rivers with regulated currents are sharply decreasing.

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1995: Enzyme activities in the blood plasma of nase, Chondrostoma nasus, during spawning.
Although this species lives in the same habitat with other native species as Acanthobrama mirabilis and Chondrostoma meandrenses, which are concerned to be Critically Endengared (CR) species in upper Akcay River.
2005b) indican que en los enterocitos de larvas de Chondrostoma nasus alimentadas con nauplios de Artemia se observa una acumulacion de vacuolas lipidicas, estimando que esto pueda deberse a un desequilibrio en los acidos grasos presentes en este tipo de alimento, el cual no es el alimento natural de estos peces.
Genotoxic and histopathological effects of water pollution on two fish species Barbus capito pectoralis and Chondrostoma nasus in the Buyuk Menderes.
Los taxones estan representados por especies de peces, tales como Anaecypris hispanica, especie catalogada como en peligro y Chondrostoma polylepis.
1998) y en peces adultos de Salmo trutta, Thymallus thymallus y Chondrostoma nasus en el periodo de desove (Luskova, 1997); sin embargo, estas alteraciones no son comparables con los resultados del presente estudio, ya que se trabajo con machos mantenidos en confinamiento.
Whereas many studies [10,8,12,30] have implicated industrial or human activities as possible source of pollution of the water body and biota the work of Karadede and Unlu [18] on the concentrations of some heavy metals in the water, sediment and fish species (Acanthobrama marmid, Chalcalburnus mossulensis, Chondrostoma regium, Carasobarbus luteus, Capoetta trutta and Cyprinus carpio) from the Ataturk Dam Lake, Turkey indicated general absence of serious pollution.
Levels of heavy metals (Cd, Pb, Cu, Cr and Ni) in tissues of Cyprinus carpio, Barbus capito and Chondrostoma regium from the Seyhan river, Turkey.
pyrenaicus, localities 5, 6, 8, and 11; Rutilus arcasi, locality 1; Chondrostoma lemmingii, locality 8; and Anaecypris hispanica, locality 9.
This study was conducted to determine length-weight relationships and condition factors of three threatened species, Alburnus orontis (31), Capoeta barroisi (95) and Chondrostoma kinzelbachi (53), inhabiting Orontes River within Turkish boundaries.
Catches of other coarse fish (including tench Tinca tinca, chub Leuciscus cephalus and nase Chondrostoma nasus) rarely, if ever, exceeded 50 individuals per year.