Russian Journal of Ecology

, Volume 38, Issue 3, pp 204–211 | Cite as

State of the population of the European pearl mussel Margaritifera margaritifera (L.) (Mollusca, Margaritiferidae) at the northeastern boundary of its range (Solza River, White Sea Basin)

  • Yu. V. Bespalaya
  • I. N. Bolotov
  • A. A. Makhrov


Only two river basins in which the European pearl mussel has survived to date are known in Arkhangelsk oblast. These are the Solza and Kozha basins. The northeastern boundary of the European range of this species passes along the watershed between the basins of the Solza and the Shirshema (the Onega Peninsula) and then along the Onega-Northern Dvina watershed. The population density and the proportion of juveniles widely vary in different parts of the Solza Basin, and, therefore, the previously conclusion concerning the ageing of the population in the Kazanka River (Bolotov and Semushin, 2003) applies only to certain parts of this river. The highest density of the pearl mussel in the Solza Basin is 68 ind./m2. Fish cultivation contributes to the conservation of this pearl mussel population, as the release of Atlantic salmon juveniles ensures reproduction of the mollusk under conditions of regulated river flow.

Key words

European pearl mussel population range size structure density Arkhangelsk oblast 


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Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  • Yu. V. Bespalaya
    • 1
  • I. N. Bolotov
    • 1
  • A. A. Makhrov
    • 2
  1. 1.Institute of Ecological Problems of the North, Ural DivisionRussian Academy of SciencesArkhangelskRussia
  2. 2.Vavilov Institute of General GeneticsRussian Academy of SciencesMoscowRussia

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