A Karyological Study of Barbus Capito,Barbus mursa and Two. Populations of Capoeta capoettiFrom Northern Iran

Karyotypic studies of two species of fishes namely Barbus capito , Barbus mursa as well as two
populations of Capoeta capoeta gracilis have been investigated. Karyotypic analysis showed that
B.Capito and B. mursa chosen from Sefidroud and Shahroud rivers (Roudbar township in Guilan province) cany diploid chromosome number as well as fundamental number(NF) of respectively 2n=
100, NF=172 and 2n= 100, NF=140. The first region chosen from Sefidroud and Shahroud rivers
(Roudbartownship in Guilan province) carries 2n=150, NF=234 and the second region (chosen from
Golestan National Park) exhibits 2n=150, NF=230. Polyploidy has been observed in these species
while ploymorphism being observed in Fundamental Number in both regions, populations of Capoeta
capoeta gracilis.