Polymorphism of smolts of pink salmon Oncorhynchs gorbuscha in the Indera River (Kola Peninsula)
| Autor: | D. A. Efremov, M. A. Ruchiev, A. G. Potutkin, A. E. Veselov, D. S. Pavlov, I. A. Baryshev |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
endocrine system animal diseases 010604 marine biology & hydrobiology media_common.quotation_subject Introduced species Stomach fullness Aquatic Science Biology biology.organism_classification 010603 evolutionary biology 01 natural sciences Competition (biology) Fishery Brown trout Kola peninsula Salmo General Agricultural and Biological Sciences Food competition media_common |
| Zdroj: | Journal of Ichthyology. 56:738-743 |
| ISSN: | 1555-6425 0032-9452 |
| Popis: | Pink salmon introduced into the White Sea started to exploit as spawning grounds middle and upper reaches of the river 20 years after its appearance in the Indera River. As a result of this, the migration pathway of smolts and late smolts appeared in addition to early smolts. The intraspecies polymorphism of smolts is confirmed by differences of early and late smolts by body length and weight, migration dates, food spectrum, and indices of stomach fullness. The food spectra of late juveniles of pink salmon coincide with those of parr of Atlantic salmon Salmo salar and of brown trout S. trutta. Greater abundance of late migrants of pink salmon may cause competition of these species for food. |
| Databáze: | OpenAIRE |
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