Fourteen years after the Shahid-Rajaei dam construction: an evaluation of morphometric and genetic differentiation between isolated up- and downstream populations of Capoeta capoeta gracilis (Pisces: Cyprinidae) in the Tajan River of Iran.
We evaluated the effects of the Shahid-Rajaei dam, 14 years after its construction, on morphometric and genetic divergence between up- and downstream populations of the Iranian fish Siah-Mahi (Capoeta capoeta gracilis). Sixty-six specimens were analyzed. There were significant differences between the 2 groups in the means of 16 morphometric characters (univariate analysis). In discriminant function analysis, the proportion of individuals classified into their original groups was 97 and 100% for up- and downstream populations, respectively. Principal component analysis of morphometric data demonstrated that the up- and downstream samples of Siah-Mahi are clearly distinct. In the genetic analysis, 6 informative primers produced 89 polymorphic bands with 95% polymorphism. In association analysis between morphological and genetic data, 63 of 89 genetic markers were significantly correlated with the 16 morphometric characters. We conclude that these are 2 morphologically and genetically distinct populations of C. c. gracilis, probably due to limited downstream dispersal and elimination of upstream migration.
Department of Fisheries, University of Applied Science and Technology, Golestan, Iran.
Hossein
H
Anvarifar
H
H
Farahmand
D M
DM
Silva
R P
RP
Bastos
A
A
Khyabani
Hassan
H
Anvarifar
D000818:Animals; D003530:Cyprinidae / Q000235:genetics*; D040961:Genetic Drift; D005819:Genetic Markers; D005828:Genetics, Population; D006801:Humans; D007492:Iran; D045483:Rivers
D005819:Genetic Markers