Abstract
The results of determining the concentration of erythropoietin and hemoglobin, morphometric parameters of erythroid elements of the mesonephros and peripheral blood of Polypterus senegalus have been presented. The maturation of erythrocytes in P. senegalus occurs both in the mesonephros and in peripheral blood. The place of synthesis and localization of erythropoietin is the mesonephros. The nuclear-cytoplasmic ratio two times lower compared to teleosts, the volume of cells two times higher and their specific surface area 1.5 times larger, the more pronounced ellipsoidal shape of mature erythrocytes, and the high concentration of hemoglobin indicate that erythrocytes of P. senegalus have a significant potential for gas exchange between the external and internal environment, which is more characteristic of amphibians (Amphibia). The revealed features of erythropoiesis of the mesonephros and peripheral blood of P. senegalus are markers of adaptation to air respiration and periodic terrestrial migrations. These adaptations were formed in the early stages of the evolution of lower vertebrates convergently with lungfish (Dipnoi) and amphibians.
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The transportation conditions were in accordance with Directive 2010/63/EU of the European Parliament and of the Council of the European Union of September 22, 2010 “On the protection of animals used for scientific purposes” (https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32-010L0063&from=EN) and Federal Law No. 52-FZ of April 24, 1995 “On the wildlife” (https://docs.cntd.ru/document/9011346).
ARRIVE guidelines (Animal Research: Reporting of in vivo Experiments). https://arriveguidelines.org/
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The work was carried out within the framework of the development program of the Yaroslavl State University: P2-GL3-2022 “Molecular genetic research, assessment of the physiological and biochemical status and biotechnological potential of living systems”
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Evdokimov, E.G., Flerova, E.A. Features of Erythropoiesis of the Mesonephros and Peripheral Blood in Polypterus senegalus (Polypteridae). J. Ichthyol. 62, 1521–1527 (2022). https://doi.org/10.1134/S003294522206008X
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DOI: https://doi.org/10.1134/S003294522206008X