obtained results after applying thermal shocks and pituitary extract injection in order to artificially breed the sterlet (acipenser ruthenus)

The sterlet (Acipenser ruthenus) is an important candidate for the Romanianaquaculture, due to the short period of time in which it reaches sexual maturity. Thepaper is describing in detail the steps that should be followed for artificially breedthe sterlet. The study was made in early spring of 2006 at an important sturgeonhatchery. After parking the broodstock in rounded corners tanks and applying thethermal shocks, the following step was the injection of pituitary extract in order toaccomplish the ovulation. Observations of female body weight variation until themoment of eggs striping where made, when the gonosomatic index was established.The study also contains observations of sterlet oocytes characteristics.