IMIS

Abundantie: Hauling plankton nets
All 4 types of nets were used for sampling the gelatinous zooplankton,
Hauls were taken (with Conical plankton net (mesh size of 500 μm,; a net mouth opening of 0.8 m.), Conical plankton net (mesh size 200 μm, diameter: 50 cm), a Juday net (with a diameter of 36 cm) and a net (diameter: 1,3 m) ) from 0-10 m on the stations with a depth above 10 m and from 0 depth 2 m (or 3m) above the bottom on the stations less than 10 m depth.
Animals bigger than 5 mm were sorted, counted and measured on board. Smaller animals were sorted, counted and measured under binoc

Biomassa: Calculation of jellyfish biomass
The protocol discribes how the biomasses of the 4 jellyfish species have been calculated in this dataset. Literature cited: Finenko GA, Romanova ZA, Abolmasova GI, Anninsky BE, Svetlichny LS, Hubareva ES, Bat L, Kideys AE (2003) Population dynamics, ingestion, growth and reproduction rates of the invader Beroe ovata and its impact on plankton community in Sevastopol Bay, the Black Sea. J Plankton Res 25, p. 539 - 549. Mutlu E, Bingel F (1999) Distribution and abundance of ctenophores and
Mnemiopsis leidyi: W = 1.074*L^2.76 (2