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Distribution of gelatinous macrozooplankton in the southern Black Sea during 1996–1999
Kideys, A.E.; Romanova, Z. (2001). Distribution of gelatinous macrozooplankton in the southern Black Sea during 1996–1999. Mar. Biol. (Berl.) 139(3): 535-547.
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

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  • Kideys, A.E.
  • Romanova, Z.

    In this study, spatial and temporal distributions of three gelatinous macrozooplankton, the scyphozoan Aurelia aurita and the ctenophores Pleurobrachia pileus and Mnemiopsis leidyi, were evaluated using the data obtained from seven southern Black Sea cruises carried out from 1996 to 1999. A comparison of nets used for the sampling of gelatinous macrozooplankton illustrated the superiority of the Hensen net with a larger mesh size (300 µm) over the Nansen net (112 µm). P. pileus was mainly concentrated below the mixed layer, while A. aurita and M. leidyi were generally confined to surface waters. Horizontally, P. pileus was associated with deep, offshore waters. P. pileus also displayed the least interannual variation of the three species. Biomass of A. aurita and M. leidyi varied substantially seasonally and inter-annually. In September 1999, the average biomass of M. leidyi was at its lowest level (12 g wet weight m–2) since its explosive development at the end of the 1980s. This was associated with the appearance of the new predatory ctenophore Beroe ovata, which appeared in the Black Sea at the end of the 1990s.

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