Внутрипопуляционный полиморфизм плотвы rutilus rutilus
Intra-population polymorphism of roach Rutilus rutilus

Summary/Abstract: The phenomenon of shift of morphological features and parameters of the roach Rutilus rutilus (Linnaeus, 1758) dwelling in littoral and pelagic areas of the Rybinsk reservoir are marked. The given phenomenon has adaptive character and allows to utilize of the environment more effectively and to master existing spatial and temporal sub niches with alternative resources perfectly. Influence of non-ecological (inheritable) differences and ecological factors on differentiation of fishes on various intrapopulation forms is considered.

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