While the potamodromous sterlet was common in past throughout Upper Danube Germany and Austria, it nearly vanished second half of 20th century. Until recently, only one small isolated reproductive sub-population is known from German–Austrian border. However, remnants another section downstream Vienna, near Austrian–Slovakian border, were discovered 2014. An assessment population size most impor...

Sturgeon spermatozoa maturation during their passage through the kidney is a prerequisite for initiation of motility. Samples of sterlet () testicular sperm (TS) were matured in vitro by incubation in seminal fluid (SF) or in SF supplemented with carbonyl cyanide -chlorophenyl hydrazone (CCCP; a respiration uncoupling agent). Sperm was diluted in activation medium (AM) containing 10 m Tris-HCl ...

Poaching of aquatic biological resources is one the most common environmental crimes, causing direct and indirect harm to entire amount fish stocks. It necessary have a clear understanding composition quality poacher’s catches in order properly manage This paper examines poaching lower reaches Irtysh River, based on data forensic ichthyologic examinations over past 9 years. The study showed tha...

Intraspecific and interspecific nucleotide sequence variations of the mtDNA control region (D-loop) were studied with mtDNAs isolated from tissue specimens of more than 1400 sturgeons of nine species: Russian sturgeon Acipenser gueldenstaedtii , Persian sturgeon A. persicus , Siberian sturgeon A. baerii , Amur sturgeon A. schrenkii , Fringebarbel sturgeon A. nudiventris , sterlet A. ruthenus , ...

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...