Spatial and temporal abundance and size trends in scyphozoan jellyfish in coastal Icelandic waters in 2008 ...

• Main Authors: Lüskow, Florian, Sigurdsson, Gudjon Mar, Svavarsson, Jörundur, Gislason, Astthor
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Climate change; Cnidaria; gelatinous zooplankton; seasonality; subarctic; warming; Event label; Species, unique identification; Species, unique identification Semantic URI; Species, unique identification URI; LONGITUDE; LATITUDE; Direction; DATE/TIME; Year of sampling; Day of the year; Season; Gear; DEPTH, water; Elevation description; Scyphozoa, umbrella diameter; Scyphozoa, wet mass; Scyphozoa, dry mass; Scyphozoa; Bongo net; Ruler stick; Calculated according to Lüskow et al. 2021; Calculated, see Comment; Iceland; Subarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.962521; https://doi.pangaea.de/10.1594/PANGAEA.962521

Scyphozoan jellyfish in Icelandic waters have received limited attention, despite apparent recent increases in jellyfish blooms and considerable regional oceanographic and climatic changes. We studied the species composition, abundance, phenology, and growth of scyphomedusae around the island and explored changes in distribution, species composition, and seasonality by comparing our findings with reports from the 1930s. Scyphomedusae were collected with a Bongo net (60 cm ring diameter, 250 cm net length, and 500 µm mesh size) in the top 10 m of the water column in five regions (fjords between 64 and 66°N) around Iceland in the spring, summer, and autumn of 2008. Between 4 and 36 tows were performed per sampling region. This dataset includes umbrella diameter, dry and wet mass, as well as abundance data of two species: Aurelia aurita and Cyanea capillata. ...