Practical Guidline of Ultrasound Diagnostic for Sturgeon

Ultrasound diagnostic is a tool that allows to successfully solve problems of not only early sex differentiation but also ongoing monitoring of gonadogenesis process or retrospective analysis, performed in accordance with the results of the bonitation. The materials introduced in this book are the result of many years of research and practical work on identification of sex and sturgeon maturity stages performed by the authors on sturgeon farms in Russia, Georgia, Uzbekistan Azerbaidzhan and other CIS countries using different methods. The guide provides basic principles of ultrasound diagnostic. There is a detailed description of ultrasound diagnostic procedure for identification of sex and maturity stage of sturgeon gonads. There is also a detailed instruction on ultrasound images analysis and description of specific diagnostic features. Annual sexual cycles with various inter-spawn intervals were for the first time analyzed specifying the duration of each maturity stage.