Hypophysectomy was performed on sexually mature sterlets, Acipenser ruthenus L., in summer and autumn. The operation usually lasted about 45 sec, but never longer than 90 sec. After the parasphenoid was stripped, an ellipsoid hole was trepanated at the level of the eyes. The hypophysis was ablated by catching its rostral end with a pincer. As the result of the extirpation of the hypophysis the ...

the sterlet (acipenser ruthenus) is one of the species of the exotic sturgeon (acipenseridae) family in iran. this important species produces caviar every year at the lowest cost and in the shortest time. the objective of this research was to assess the effect of digestarom, as a nutritional supplement, on the growth indices and safety factors of synthetically-cultured baby sterlets (acipenser ...

•De novo reference genome assemblies of four non-teleost ray-finned fishes•Basal fishes have key limb development regulatory elements•Lung-related genes in early hold the for lung origin•Cardio-respiratory systems’ co-evolution during air breathing evolution Rich fossil evidence suggests that many traits and functions related to terrestrial were present long before ancestor lobe- fishes. Here, ...

Purpose. To analyze the productive-biological and biochemical parameters of sturgeon larvae fry under conditions introduction synthetic (Levamisole) organic (Chitosan) immunostimulants into their diet. evaluate effect supplements on stability homeostatic processes based analysis enzyme activity. Methodology. The study was carried out juvenile hybrid besters (♀ Huso huso х ♂ Acipenser ruthenus) ...