The 10th International Symposium on Sturgeon (ISS10)

To restore the stocks of sturgeon fish species in depressed state, it is necessary to form repair and uterine stocks in hatchery farms. The technology of forming uterine stocks with use of recirculation water systems is far from perfect due to the low fish breeding performance of spawners. The purpose of this work was to use non-invasive express method of ultrasound diagnostics for the early detection of pathologies and diseases of sturgeon internal organs. In addition to two-dimensional black-and-white image, the following Doppler techniques were used: pulse-wave and constant-wave Doppler imaging, tissue harmonic imaging, energy Doppler, elastography. If 2D sonography data did not provide sufficient information about the anatomical object, panoramic scan was performed. Regular sonographic studies of sturgeon abdominal organs, carried out in 2018-2024 at 20 fish breeding enterprises in Siberia revealed a number of common pathologies and diseases: cystosis and polycystic disease of reproductive system and liver, hydrocele, fatty degradation of gonads and liver, atrophy and torsion of testes, neoplasm in generative tissue, hermaphroditism, thickening of cover and sludge in the gallbladder, some others. The number of individuals with disorders in the development of internal organs at some enterprises reached 67.9%, an average 24.8%. Three stages of cystic degeneration of female ovaries were characterized by ultrasonic scanning. A significant increase in the number of females over the age 9 years with replacement of generative tissue with connective tissue (13.6% of individuals) should be noted. With the help of ultrasonic monitoring and histological studies to study the nature of "ink spots" on the skin epithelium of Siberian sturgeon spawners of natural Lena population, malignant skin neoplasms were detected and treatment routes were outlined. So, the annual ultrasonic monitoring of sturgeon fish internal organs for the early detection of pathological changes will allow timely measures to prevent and treat fish.
 

Neoplasm, Polycystic, Sturgeon Fish, Diseases, Ovaries, Testes,