Publication Date:
2023-03-07
Description:
In recent years a global increase in jellyfish (i.e. Cnidarians and Ctenophores) abundance and a rise in the recurrence of jellyfish outbreak events have been largely debated, but a general consensus on this matter has not been achieved yet. Within this debate, it has been generally recognized that there is a lack of reliable data that could be analyzed and compared to clarify whether indeed jellyfish are increasing throughout the world ocean as a consequence of anthropogenic impact and hydroclimatic variability. During the G.O. Sars cruise jellyfish were collected at different depths in the 0-1000m layer using a standard 1 m**2 Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS) (quantitative data), Harstad and macroplankton trawls (qualitative data). The comparison of records collected with different nets during the G.O. Sars transatlantic cruise shows that different sampling gears might provide very different information on jellyfish diversity. Indeed, the big trawls mostly collect relatively large scyphozoan and hydrozoan species such as Atolla, Pelagia, Praya, Vogtia, while small hydrozoans (e.g. Clytia, Gilia, Muggiaea) and early stages of ctenophora are only caught by the smaller nets.
Keywords:
Basin Scale Analysis, Synthesis and Integration; Cnidaria; Ctenophora; Date/Time of event; Depth, bottom/max; Depth, top/min; DEPTH, water; EURO-BASIN; Event label; G. O. Sars (2003); GS13/107; GS13/107_152_JFN; GS13/107_152_MOC; GS13/107_154_MOC; GS13/107_155_JFN; GS13/107_155_MOC; GS13/107_157_JFN; GS13/107_157_MOC; GS13/107_159_JFN; GS13/107_160_JFN; GS13/107_160_MOC; GS13/107_160-2_JFN; GS13/107_161_JFN; GS13/107_161_MOC; GS13/107_162_JFN; GS13/107_162_MOC; GS13/107_163_JFN; GS13/107_163_MOC; GS13/107_165_JFN; GS13/107_166_JFN; GS13/107_167_JFN; GS13/107_167_MOC; GS13/107_168_JFN; GS13/107_168_MOC; GS13/107_169_JFN; GS13/107_169_MOC; GS13/107_170_JFN; GS13/107_170_MOC; GS13/107_171_JFN; GS13/107_171_MOC; Jellyfish net; JFN; Labrador Sea; Latitude of event; Longitude of event; Method/Device of event; MOC; MOCNESS opening/closing plankton net; North Atlantic; Norwegian Trans Atlantic Cruise; Station 152; Station 154; Station 155; Station 157; Station 159; Station 160; Station 160-2; Station 161; Station 162; Station 163; Station 165; Station 166; Station 167; Station 168; Station 169; Station 170; Station 171
Type:
Dataset
Format:
text/tab-separated-values, 376 data points
