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Introduction: The etiology of mental disorders is largely influenced by genetic elements. Several studies have shown that genetic elements influence major mental disorders (MDs). However, the quantity and type of the genetic input remain unknown and require further research. Objective: In this review, we aim to investigate the impact of genetic markers on the development of mental disorders. Methodology: In our study, we included English studies from online databases such as Web of Science, Scopus, Google Scholar, PubMed, and the Cochrane Library using the following keywords “genetic factors”, “genetic markers”, “mental disorders”, “anxiety”, “depression”, and “schizophrenia” till March 2024. Results: The result of the search utilizing the strategy of our search was 2107 studies. We selected the articles that were relevant to our topic by screening these articles. After eliminating the remaining papers based on title and abstract screening, we conducted a full-text screening of 318 publications. In the end, we consulted 68 articles to learn more about our subject and compose this evaluation. Scientific Novelty: Most of the previous studies discovered that genetic elements contribute to major MDs. However, the nature and extent of the genetic contribution have not been determined. In our review, we discussed the genetic contribution to the occurrence of MDs. Practical Significance of the Results Obtained: The influence of genetic research on individuals with MDs and their families was one of our review’s main concerns. Understanding the extent of genetic elements’ contribution to MDs may have implications for society, research, patient outcomes, and quality of life. Conclusion: This comprehensive study demonstrates that the development and onset of MDs are affected by several elements, which can be genetic polymorphisms and genetic mutations. The potentiality of genetics studies to detect the occurrence of MDs may help in the early recognition of these conditions. It could assist in identifying people who are more susceptible to developing specific disorders according to their genetic profile. [ABSTRACT FROM AUTHOR]

The alien shrimp Macrobrachium nipponense (De Haan, 1849 [in De Haan, 1833-1850]), oriental river prawn has been identified in the water bodies of the Ukrainian part of the Danube Delta for the first time. Diagnosis of the species is based on measurements of 35 specimens. Characteristic features: the dorsal side of rostrum armed by 12-13 teeth, with feathery setae between them, 3 (rarely 2) teeth located on the ventral side of rostrum. During 2019-2020, the freshwater shrimp, M. nipponense, has become a common element of the benthic fauna of the Kiliya arm of the Danube River. It is supported by regular registrations of numerous shrimp aggregations in different parts of the arm (from the 32nd to the 80th km of the main stream) since the summer of 2019. The record of this alien shrimp species potentially confirms its introduction from other water bodies of the North-Western Black Sea Coastal Area to the Danube Delta by the natural dispersion or the unauthorized introduction. Although the known records suggest an accidental introduction of this species into the area close to the lakes of the Lower Danube area, both hypotheses require further investigation and approbation. [ABSTRACT FROM AUTHOR]