The present work reports behavioural responses by young-of-the-year (21-30 cm) Atlantic sturgeon Acipenser oxyrinchus oxyrinchus and shortnose sturgeon Acipenser brevirostrum to nine binary combinations of dissolved oxygen saturation (40, 70 and 100%), temperature (12, 20 and 28°C) and salinity (1, 8 and 15). Both species showed no acclimation effects and similar discrimination and avoidance re...

Due to the increasing resistance of aquaculture pathogens antibiotics, search for new approaches control infectious diseases is particular importance. A promising approach development probiotic preparations based on antagonist bacteria. The paper studied antagonistic activity Bacillus strains that are developing probiotics fish. were isolated from bottom sediments Don River in area Donskoy Fish...

The article highlights the experience of using astaxanthin in sterlet feeding. Studying influence on morphophysiological state fish helps develop highly effective recipes compound feeds for valuable objects aquacultures. This intense antioxidant impacts work all systems and overall health, but feeding has not reffered to aquaculture facilities. physiological status sturgeons been studied. It wa...

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...

In the present study, biological function of recombinant gonadotropin-releasing hormone associate peptide (rGnRH) was tested for induction ovulation and spawning in Sterlet sturgeon (Acipenser ruthenus) broodstock. For this purpose, broodstock were divided into four treatments treated with following preparing procedure: 0.9% NaCl (C); 2.5 ?g kg body weight?1 (BW) LHRH-A2 (luteinizing hormone-re...