Black Sea Gelatinous zooplankton data from the 'MARMOD-FAZ2 DEKOSIM BRIDGE Sep 2021' cruise performed in September 2021

The dataset contains data from samples collected in September 2021 onboard of R/V Bilim-2, at different stations located in Bosphorous sector of Turkish EEZ in Black Sea. The sampling was performed within the BRIDGE-BS project (EU H2020, grant agreement No 101000240). Zooplankton samples were collected by towing a WP-2 net with a 200 µm mesh size and a 57 cm mouth diameter. Lead pieces were attached to the collector to minimize the displacement of the net with the currents. On windy days, the vessel drifted from the point where the net was lowered down. In both cases, the wire angle was calculated and the length of the wire was corrected to collect the whole water column. Hauls were made with a speed of 1 m/s to minimize the spilling out of the water. For the nearshore stations, the net was towed vertically from 4-5 m above the bottom to the surface. For the offshore stations, the net was towed from the start of an anoxic layer (sigma-t, 16.2 kg/m3). The gelatinous organisms were sorted from the sample in the plankton net. Sorted gelatinous organisms were identified and some measurements (diameter, aboral length, wide length, total length, etc) were measured on the board. For wet weight measurements, organisms were frozen separately at -18 0C. In the institute laboratory, the wet weight analysis was done with a precision balance (0,0001 gr resolution). The rest of the sample were fixed with 5% borax-buffered formaldehyde in 250 ml bottles for the other analysis. The data file is in OBIS format.