Morphophysiological patterns of life history strategy adoption in Dolly Varden Salvelinus malma in Kamchatka
| Autor: | N. V. Belova, M. A. Gruzdeva, E. D. Pavlov, D. S. Pavlova, M. P. Polyakov, K. V. Kusishchin, A. M. Malyutina, A. G. Bush |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
education.field_of_study Fish migration Gonad biology Ecology 010604 marine biology & hydrobiology Population 04 agricultural and veterinary sciences Aquatic Science biology.organism_classification 01 natural sciences Life history theory medicine.anatomical_structure 040102 fisheries medicine 0401 agriculture forestry and fisheries Age composition General Agricultural and Biological Sciences education Salvelinus |
| Zdroj: | Journal of Ichthyology. 57:688-705 |
| ISSN: | 1555-6425 0032-9452 |
| DOI: | 10.1134/s0032945217050083 |
| Popis: | Growth, age composition, gonad maturity and patterns of life history strategy adoption in the population of Dolly Varden from the Kol River (West Kamchatka) are studied. Major factors controlling differentiation of juveniles and trajectories of ontogenetic developments, growth rate and gametogenesis in generations in particular years. The differentiation in a generation into anadromous and resident groupings is completed mainly at the age of 4 years. The process of formation of resident and migratory life history strategy in Dolly Varden is epigenetic. Bifurcation in the life of one specimen is observed once in life, and that in a generation is observed four times: at the first, the second, the third, or the fourth year. The life cycle of females from the Kol River is invariant until they reach the age of 1 year, and that in males is during the 4 years of the freshwater phase. In Kamchatka, all spawners, including precocious males, may reproduce several times during life. |
| Databáze: | OpenAIRE |
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