Morphological and molecular genetic study of the Persian sturgeon Acipenser persicus Borodin (Acipenseridae) taxonomic status

Morphological and molecular genetic analyses of the Russian sturgeon sensu Berg (1934) were accomplished using the sample of individuals collected in the southern part of the Caspian Sea. The distribution of specimens in the space of principal components calculated using 28 morphometric characters demonstrates the absence of separate clusters. Frequency distributions of six studied meristic characters are unimodal and do not demonstrate the existence of morphologically distinguishable forms within the analyzed sample. The results of molecular genetic study, based on the cytochrome b polymorphism analysis of the same sample of fish, demonstrate its homogeneity. The joined results of morphological and molecular genetic analyses of the Russian sturgeon sensu Berg (1934) do not support the validity of the Persian sturgeon as a separate species Acipenser persicus .