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Influence of Morphophysiological Changes in Immune System Organs on Lysozyme in Males of Pike Esox lucius

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Abstract

The concentration of lysozyme in the liver, kidneys, spleen, and serum, as well as the size of immune system organs in males of pike Esox lucius L., vary in different seasons of the year. Enzyme concentrations in organs and serum are weakly related to each other. Considering the absolute organ weight, the organs demonstrate a strong relationship with each other, but the correlation between their somatic indices is very weak. The size of organs affects the concentration of lysozyme in the organs themselves and in the serum. The liver plays a major role in intra-annual fluctuations in the concentration of lysozyme in all organs and serum. The kidney has the opposite effect on the liver, balancing the effect on the concentration of the enzyme in the liver and serum. The most profound morphophysiological changes in organs and lysozyme (as an indicator of nonspecific immunity) coincide with the breeding season of fish.

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Funding

This research was performed in the framework of the state assignment (theme No. АААА-А18-118012690222-4).

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Correspondence to M. F. Subbotkin.

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Conflict of interests. The authors declare that they have no conflict of interest.

Statement on the welfare of animals. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Translated by D. Martynova

Abbreviations: LSI, KSI and SSI are somatic indices of the liver, kidneys and spleen, respectively; SIO is the sum of organ indices.

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Subbotkin, M.F., Subbotkina, T.A. Influence of Morphophysiological Changes in Immune System Organs on Lysozyme in Males of Pike Esox lucius. Inland Water Biol 16, 776–780 (2023). https://doi.org/10.1134/S1995082923040193

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