Abstract
The deterioration of toxicological situation in the water area of the Volga‐Caspian region in the past years has a detrimental effect on ichthyofauna, especially on the state of populations of sturgeons, a characteristic feature of which is a long lifespan. As a result, natural reproduction of sturgeons already cannot maintain the abundance of species at normal level. For this reason, obtaining viable qualitative material in artificial reproduction of sturgeons in fisheries is a topical problem. In the past decade, larvae of sturgeons (Russian sturgeon, stellate sturgeon, and beluga) grown in fisheries of the Volga basin, had a broad spectrum of abnormalities in the development of different organs and tissues [3, 6, 11]. One of the most frequent abnormalities in larvae of sturgeons at the stage of hatching and beginning of active foraging are changes in the structure of their myotomes. The appearance test of fixed larvae with a binocular shows that many myotomes of the body contain cavities, in which muscle fibers are absent. In 1988 these abnormalities were observed only in single larvae at the stage of hatching; however, staring from 1995, the lesions of skeletal muscles have become mass-scale in larvae of all species of sturgeons at all developmental stages studied. However, the nature of the described defects in the structure of myotomes of sturgeons remained obscure. The goal of this study was to perform histological
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call