Russian Journal of Ecology

, Volume 38, Issue 6, pp 430–435 | Cite as

Intrapopulation spatial segregation in bream (Abramis brama) and roach (Rutilus rutilus) in the Rybinsk Reservoir

  • Yu. V. GerasimovEmail author


In the course of studies on mass fish species (bream and roach) in water bodies of the Upper Volga basin, intraspecific groups of individuals have been distinguished. Conditions and possible mechanisms of spatial differentiation of these groups are considered. The intrapopulation divergence of individuals by some adaptive characters, primarily behavioral, enables them to utilize alternative resources, which provides for more efficient use of the environment by populations.

Key words

bream roach intraspecific groups food resources spatial segregation 


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© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  1. 1.Papanin Institute of the Biology of Inland WatersRussian Academy of SciencesBorok, Nekouzskii raion, Yaroslavl oblastRussia

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