Priroda

The article presents the results of observations conducted by scientists from the Southern Scientific Center of the Russian Academy of Sciences during regular fishing expeditions in the Don River delta and the eastern part of the Taganrog Bay in the Sea of Azov. It was established that the ichthyofauna of the studied region is represented by 43 species of fish from 13 families. The article covers the ecology of the Azov-Don fish, examines the processes of low water levels and their impact on the ichthyofauna. Special attention is given to invasive species and their influence on the native ichthyofauna. The article discusses current issues related to the development of coastal areas in the Azov-Don region, highlights irreversible processes in the Don Delta, including those affecting fish stocks, and addresses the challenges of preserving ichthyofauna and protecting marine bioresources. Special attention is paid to invasive species and their impact on the indigenous ichthyofauna. The article discusses current issues related to the development of coastal areas in the Azov-Don region, highlights the irreversible processes in the Don Delta, including those affecting fish stocks, and addresses the challenges of preserving ichthyofauna and protecting marine biological resources. The article also focuses on analyzing the reasons for the decline in the stocks of Azov fish and their commercial value.

The ancient settlement of Tanais (first quarter of the 3-rd century BC - 5-th century AD) is a unique example of the borderland of cultures and civilizations - the ancient Greeks and barbarians, the nomadic and sedentary tribes that lived in the steppe of the Azov Sea and the Lower Don. The city has a rich history with its ups and downs, and the reasons for its disappearance remain unclear.

In recent years, it has become clear that the development of many diseases is influenced not only by the usual factors such as heredity, poor diet, environmental pollution, and bad habits, but also by more subtle molecular mechanisms that regulate the functioning of genes, such as how and when genes are “turned on” and “turned off.” These processes can be controlled by RNA molecules that are synthesized as a result of gene activity, including circular RNA.