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Sea spiders (Arthropoda, Pycnogonida) from ten recent research expeditions to the Antarctic Peninsula, Scotia Arc and Weddell Sea - data
Maxwell J, Gan Y, Van de Putte A, Griffiths H (2021): Sea spiders (Arthropoda, Pycnogonida) from ten recent research expeditions to the Antarctic Peninsula, Scotia Arc and Weddell Sea - data. v1.5. SCAR - AntOBIS. Dataset/Occurrence.

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Archived data
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution 4.0 International License.

The dataset contains information on specimens of Southern Ocean Pycnogonida (Arthropoda), that were collected from 10 different research cruises, spanning 13 years. The individual aims and objectives of each cruise can be found in their cruise reports. The specimens have been collated into a single dataset, forming the basis of J Maxwell’s PhD. The dataset will be used to investigate the community structure of Antarctic pycnogonids and the factors which influence its composition. more

The samples were collected from different areas in the Southern Ocean, mainly the Weddell sea, South Orkney Islands, and the Western Antarctic Peninsula.
Pycnogonida were identified to at least genus or species.
The majority of the specimens were sampled using an Agassiz trawl (AGT) and an epibenthic sledge (EBS) with 165 AGT and 14 EBS deployments. The AGT had a mesh size of 1 cm and a mouth width of 2 m (except for JR17007 where the mouth was 1.25 m). AGTs were deployed to a depth of between 54 and 2279 m. The EBS had a suprabenthic- and an epibenthic net, both with a mesh size of 500 μm (cod-ends 300 μm). The epibenthic net extended from 27 cm to 60 cm above the bottom, with the suprabenthic net extending from 100 cm to 133 cm. The EBS was deployed as described by Brenke (2005) and was fitted with an open-closing mechanism so that the mouth of both nets were closed whenever the EBS was not in contact with the seafloor. EBSs were deployed to depths of between 436 and 5339 m. Both the AGT and EBS were deployed for approximately 10 minutes (trawling time) and at a speed of 1 knot. Pycnogonids were also recovered from Rauschert dredge (RD) deployments, once during PS118 and two occasions during both JR15005 and PS77. During PS118 and PS77 the RD mesh size was 1 mm, while a mesh of 500 μm was used on JR15005. The RD was deployed attached to the AGT with 5 metres of cable. Deployments were between 278.5 – 817 m. A bottom trawl was used during PS77, which was a 130ft trawl with a 10 mm herring codend. This was deployed 12 times at depths of between 223.5 and 486 m. The protocol for deployment of the BT was similar to that of the AGT but with slightly longer trawl times (approx 20 min). A single pycnogonid was recovered from a kelp raft that was recovered from the surface during JR15005.
This dataset is published by SCAR-AntOBIS under the license CC-BY 4.0. Please follow the guidelines from the SCAR and IPY Data Policies ( when using the data. If you have any questions regarding this dataset, please don't hesitate to contact us via the contact information provided in the metadata or via

Biology > Invertebrates
Marine/Coastal, PSW, Antarctica, Antarctic Peninsula, PSW, Antarctica, South Orkney I., PSW, Weddell Sea, Pycnogonida

Geographical coverage
PSW, Antarctica, Antarctic Peninsula [Marine Regions]
PSW, Antarctica, South Orkney I. [Marine Regions]
PSW, Weddell Sea [Marine Regions]

Temporal coverage
22 December 2007 - 2 April 2019

Taxonomic coverage
Pycnogonida [WoRMS]

Occurrence of biota

Koninklijk Belgisch Instituut voor Natuurwetenschappen (IRScNB/KBIN), moredata creator
National University of Ireland Galway (NUI Galway), moredata creator
Natural Environment Research Council; British Antarctic Survey (BAS), moredata creator

Related datasets
Published in:
AntOBIS: Antarctic Ocean Biodiversity Information System, more
(Partly) included in:
RAS: Register of Antarctic Species, more

Dataset status: Completed
Data type: Data
Data origin: Data collection
Metadatarecord created: 2021-12-06
Information last updated: 2021-12-06
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy