Sturgeons are fish species with a complex biology. They are also characterized by complex aspects including polyploidization and easiness of hybridization. As with most of the Ponto-Caspian sturgeons, the populations of Acipenser ruthenus from the Danube have declined drastically during the last decades. This is the first report on mitochondrial point heteroplasmy in the cytochrome b gene of th...

the aim of the present study was to develop an in vitro system for functional investigation of ovarian follicular cells in sterlet, acipenser ruthenus. oocytes for the primary culture were obtained from the ovaries of a 6 years old sterlet 729 g in weight and 47 cm in total length. the oocytes were in advanced vitellogenesis stage (pi >10). a part of the ovary (containing about 300 follicles) w...

The primary goal in aquaculture is to maximize the growth and survival of farmed fishes at a minimal cost, which requires an understanding changes metabolism undergone by different fish breeds during development. In particular, highly intensive production systems, such as recirculating require better oxygen consumption. Ontogenetic phase shifts (i.e., sudden changes) have been observed several ...

the aim of the present study was the genetic analysis of the dniester population of sterlet acipenser ruthenus and comparison of it to five other sterlet populations, in order to develop a population recovery plan. the genetic analysis of six sterlet populations from eurasian rivers (dniester, dnieper, danube, volga, kama and ob) was carried out using microsatellite dna markers. the genetic var...

Two sturgeon species, Acipenser ruthenus (Linnaeus, 1758) and baerii (Brandt, 1869), inhabit the Irtysh basin. In 2018, we received some “atypical” specimens of sturgeon, which were similar to A . but had a number pronounced external differences. The hybrids A. × , named “oster”, can sometimes be caught in natural habitats Ob Yenisei rivers. Despite development methods for genetic identificatio...