Russian ( ), Persian ( ) and Siberian ( Acipenser gueldenstaedtii A. persicus A. ) sturgeons are closely related ‘Ponto-Caspian’ species. Investigation of baerii their population structure is an important problem, the solution of which determines measures for conservation of these species. According to previous studies, ‘baerii-like’ mitochondrial genotypes were found in the Caspian Sea among 3...

Quaternary Caspian Sea level variations depended on geophysical processes (affecting the opening and closing of gateways basin size/shape) hydro-climatological water balance). Disentangling drivers past variation, as well mechanisms by which they impacted is much debated. In this study we examine relative impacts hydroclimatic change, ice-sheet accumulation melt, isostatic adjustment change. We...

this paper provides information on the geographic distributions of two cyprinid species: hemiculter leucisculus (basilewsky, 1855) and alburnus caeruleus heckel, 1843, in the world and the entire drainage systems in iran. the new distribution records were taken from maroon river (jarrahi river system) and chardaval river (karkheh river system), both in tigris river basin showing wide and narrow...

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The paper discusses the distribution of Bufo verrucosissimus in North Caucasus. It is noted that absolute majority findings this species Russia have occurred Black Sea basin. All currently known habitats B. Caspian basin are located upper part Kuma River (the vicinity Kislovodsk town and Borgustanskaya village Stavropol region). New points shown between mouths Ugol’naya Kladbishchenskaya Balka ...

To study the intraspecific diversity of Caspian Asp, Leuciscus aspius in South Sea region, Iran, we collected 2016–2017 a total 101 specimens from Aras River and Astara, Anzali, Kiashahr Langeroud shores, analysed 41 morphometric nine meristic characteristics with multivariate statistical methods. Significant differences were found between these populations 27 traits. A Principal Component Anal...