Abstract
The features of the growth and early maturation of brown trout Salmo trutta L. in the Alatsoya River (Republic of Karelia) are studied. As a rule, the age of brown trout in this river does not exceed 3 years and one of its life strategies is the formation of precocious males. Precocious males reach their puberty at age 1+; they are characterized by a larger size than parrs of the same age and have a high growth rate in the first year of life. Females do not reach puberty until age 2+. There is a hypothesis that precocious males begin to appear in the brown trout population from the Alatsoya River during the first summer of their life.
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ACKNOWLEDGMENTS
We are grateful to Prof. K.V. Kuzishchin (Moscow State University) for providing valuable comments on the text of the manuscript.
Funding
The material collection was supported by grant no. 14-14-01171 of the Russian Science Foundation and the analysis of the material and preparation of the article were supported by grant no. 19-14-00015 of the Russian Science Foundation.
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Translated by D. Zabolotny
Abbreviations: NCR, nuclear-cytoplasmic ratio of oocytes.
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Pavlov, E.D., Bush, A.G., Kostin, V.V. et al. Growth and Early Maturation of Brown Trout Salmo trutta in the Alatsoya River (Republic of Karelia). Inland Water Biol 13, 640–647 (2020). https://doi.org/10.1134/S1995082920060115
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DOI: https://doi.org/10.1134/S1995082920060115