Seafloor image annotations from the Sabrina upper slope, East Antarctica

Four camera tow transects were completed on the upper slope during survey IN2017_V01 using the Marine National Facility’s Deep Tow Camera. This system collected oblique facing still images with a Canon – 1DX camera and high definition video with a Canon – C300 system. Four SeaLite Sphere lights provided illumination and two parallel laser beams 10 cm apart provided a reference scale for the images. This dataset presents results from the analysis of the still imagery. All camera tows were run at a ship speed over the ground of approximately 2 knots. Several sensors were attached to the towed body, including a SBE 37 CTD for collection of salinity, temperature and pressure data, a Kongsberg Mesotech altimeter and a Sonardynne beacon to record the location of the towed body. Transects were run downslope from the continental shelf break, with images analysed over a depth range of ~495 m to 670-725 m.

Biota and substrates were characterised for every fifth image according to the CATAMI image classification scheme (Collaborative and Automated Tools for Analysis of Marine Imagery, Althaus et al., 2015). Images were loaded into the online platform SQUIDLE+ for analysis. Biota were counted as presence/absence of all visible biota for each image. Percent biological cover and substrate type for the whole image was calculated based on analysis of 30 random points across each image. Percent cover calculations were standardised according to the proportion of scored points on each image, excluding those that were too dark to classify. A total of 203 images were analysed.

Images are available from: http://dap.nci.org.au/thredds/remoteCatalogService?catalog=http://dapds00.nci.org.au/thredds/catalog/fk1/IN2017_V01_Sabrina_Seafloor/catalog.xml

Identification info

Alternate title: Seafloor image annotations from the Sabrina upper slope, East Antarctica

Date (Publication): 2020-04-01

Edition: 1

Citation identifier

Dataset DOI

Title: Information and documentation - Digital object identifier system

Date (Publication): 2012-04-23

Citation identifier: ISO 26324:2012

Citation identifier: doi:10.26179/5caed60a7b076

Originator

Post, A., O'Brien, P.E., Armand, L.K. and Carroll, A.

Publisher

Australian Antarctic Data Centre

Principal investigator

POST, ALIX

Geoscience Australia

Corner of Jerrabomberra Av. and Hindmarsh Drv.

GPO Box 378

Symonston

Australian Capital Territory

2609

Australia

+61 2 6249 9023

Principal investigator

O'BRIEN, PHILIP EDWARD

Principal investigator

ARMAND, LEANNE KAY

The Australian National University

Jaeger Building 4

Office L5

142 Mills Road

Acton

Canberra

ACT

2601

Australia

+61 2 6125 6713

Principal investigator

CARROLL, ANDREW

Collaborator

POST, ALIX

Geoscience Australia

Corner of Jerrabomberra Av. and Hindmarsh Drv.

GPO Box 378

Symonston

Australian Capital Territory

2609

Australia

+61 2 6249 9023

Name: CAASM Metadata

Website: https://data.aad.gov.au/metadata/records/AAS_4333_AAS_4333_IN2017_V01_seafloor_imagery_annotations

Purpose: This dataset provides presence/absence data for taxa, % biological cover and substrate attributes determined from seafloor images from the Sabrina upper slope. These data provide an understanding of seabed habitats and diversity of taxa.

Status: Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)

Australian Antarctic Division

203 Channel Highway

Kingston

Tasmania

7050

Australia

+61 3 6232 3244

+61 3 6232 3351 (facsimile)

Topic category

Oceans

Extent

Description: Temporal Coverage

Temporal extent

TimePeriod: 2017-01-14 2017-03-05

Extent

Description: Vertical Extent - Depth

Vertical element

Minimum value: 400

Maximum value: 2000

Identifier: urn:x-ogc:def:cs:EPSG:6498

Name: Vertical CS. Axis: depth (D). Orientation: down. UoM: m.

Identifier: urn:x-ogc:def:axis:EPSG:113

Name: depth

Title: Interactions of the Totten Glacier with the Southern Ocean through multiple glacial cycles (IN2017-V01): Post-survey report

Date (Publication): 2018

Author

Armand, L., O'Brien, P., Armbrecht, L., Baker, H., Caburlotto, A., Connell, T., Cotterle, D., Duffy, M., Edwards, S., Evangelinos, D., Fazey, J., Flint, A., Focardi, A., Gifford, S., Holder, L., Hughes, P., Lawler, K.-A., Lieser, J., Leventer, A., Lewis, M., Martin, T., Morgan, N., López Quirós, A., Malakoff, K., Noble, T., Opdyke, B., Palmer, R., Perera, R., Pirotta, V., Post, A., Romeo, R., Simmons, J., Thost, D., Tynan, S., Young, A.