Gelatinous Zooplankton in Gotland, Sweden, 2022

Sampling event Observation
Latest version published by OBIS Secretariat on Apr 18, 2025 OBIS Secretariat
Publication date:
18 April 2025
Published by:
OBIS Secretariat
License:
CC-BY 4.0

Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 66 records in English (10 KB) - Update frequency: as needed
Metadata as an EML file download in English (7 KB)
Metadata as an RTF file download in English (7 KB)

Description

Video footage from seagrass meadows around Gotland, originally collected in 2022 to study seagrass-associated fish, was reanalyzed to estimate jellyfish (Aurelia aurita) abundance. Footage was obtained at six sites using a GoPro HERO 5 Black camera towed horizontally over seagrass-dominated soft bottoms at depths of 2.1–6.9 m. The camera, positioned 80–100 cm above the seafloor, captured transects 55 m in length during morning and evening sessions. Sixty transects were recorded, 10 transects per site, with video durations averaging 4 minutes. Jellyfish abundance was estimated by calculating the volume of water filmed, modeled as a triangular prism based on the camera’s field of view and orientation (perpendicular or tilted 70°). Additional measurements included surface and bottom temperatures, as well as wind speed and direction, retrieved from external sources. Full calculation details are provided in the associated paper, Luskow et al 2025.

Data Records

The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 66 records.

2 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.

Event (core)
66
ExtendedMeasurementOrFact 
438
Occurrence 
60

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.

Versions

The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Lüskow F (2025). Gelatinous Zooplankton in Gotland, Sweden, 2022. Version 1.0. OBIS Secretariat. Samplingevent dataset. https://ipt.obis.org/bioecoocean/resource?r=gelatinous-zooplankton-gotland_2022&v=1.0

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is OBIS Secretariat. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF Registration

This resource has not been registered with GBIF

Keywords

Samplingevent; Observation

Contacts

Florian Lüskow
  • Originator ●
  • Point Of Contact
Uppsala University
SE
Elizabeth Lawrence
  • Processor
Lina Mtwana Nordlund
  • Principal Investigator
Uppsala University
SE

Geographic Coverage

Sampling sites around Gotland, Sweden

Bounding Coordinates South West [56.867, 17.952], North East [58.066, 19.424]

Taxonomic Coverage

No Description available

Species Aurelia aurita (Common jellyfish)

Temporal Coverage

Start Date / End Date 2022-08-14 / 2022-09-16