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The Role of Respawning Individuals in the Reproduction of Atlantic Salmon Salmo salar (Salmonidae). Mathematical Simulation

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Abstract

Analysis of long-term fishing and biological data has made it possible to determine the proportion of respawning individuals (the “remainder”) in populations of Atlantic salmon Salmo salar inhabiting large rivers of the Kola Peninsula. The contribution of respawning individuals to the dynamics of the Atlantic salmon population was assessed using the mathematical simulation model. It is shown that the model population becomes more resistant to fishing with increase in the “remainder” proportion; however, the influence of such individuals on the population dynamics is noticeable only when their relative number is more than 5% in the spawning population. The results of different model experiments are interpreted. The role of respawning salmons may be determined not so much by their quantitative contribution to the reproduction process as by the maintenance of the genetic diversity of the population within the reproductive strategy characteristic of the Atlantic salmon.

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ACKNOWLEDGMENTS

I am very grateful to members of the Polar Research Institute of Marine Fisheries and Oceanography A.V. Zubchenko for valuable comments on the text of the manuscript and I.V. Samokhvalov and A.G. Potutkin for assistance in collecting the material.

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  1. Polar Branch Russian Federal Research Institute of Fisheries and Oceanography—PINRO, Murmansk, Russia

    M. Yu. Alekseev

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Correspondence to M. Yu. Alekseev.

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Translated by D. Zabolotny

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Alekseev, M.Y. The Role of Respawning Individuals in the Reproduction of Atlantic Salmon Salmo salar (Salmonidae). Mathematical Simulation. J. Ichthyol. 63, 506–512 (2023). https://doi.org/10.1134/S0032945223020017

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