, Volume 451, Issue 1–3, pp 187–197 | Cite as

The new invader Beroe ovata Mayer 1912 and its effect on the ecosystem in the northeastern Black Sea

  • Tamara A. Shiganova
  • Yulia V. Bulgakova
  • Stanislav P. Volovik
  • Zinaida A. Mirzoyan
  • Sergey I. Dudkin


The abundance, biomass and distribution of the ctenophore, Beroe ovata Mayer 1912 were assessed along with several parameters associated with composition, respiration and feeding. Digestion time of B. ovata feeding on other ctenophores ranged from 4–5.5 h for Mnemiopsis leidyi A. Agassiz to 7–8 h for Pleurobrachia pileus (O. F. Müller). Daily ration was estimated as 20–80% of wet weight based on field observations of feeding frequency coupled with digestion time. Calculations indicate that the measured population of B. ovata ingested up to 10% of the M. leidyi population daily. A marked decrease in M. leidyi density was recorded. The abundance of zooplankton increased about 5-fold and ichthyoplankton about 20-fold compared with the same season in previous years following the M. leidyi invasion.

Azov Sea Mnemiopsis leidyi feeding respiration ichthyoplankton zooplankton 


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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Tamara A. Shiganova
    • 1
  • Yulia V. Bulgakova
    • 2
  • Stanislav P. Volovik
    • 3
  • Zinaida A. Mirzoyan
    • 3
  • Sergey I. Dudkin
    • 3
  1. 1.P. P. Shirshov Institute of OceanologyRussian Academy of SciencesMoscowRussia
  2. 2.P. P. Shirshov Institute of OceanologyRussian Academy of SciencesMoscowRussia
  3. 3.State Unitary Enterprise ResearchInstitute of the Azov Sea Fishery ProblemsRostov-on-DonRussia

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