Characterisation of seafloor imagery from the Sabrina Coast continental shelf

• Other Authors: AADC (originator), AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: biota; oceans; EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC; SEA ANEMONES; EARTH SCIENCE; BIOLOGICAL CLASSIFICATION; ANIMALS/INVERTEBRATES; CNIDARIANS; ANTHOZOANS/HEXACORALS; HARD OR STONY CORALS; ANTHOZOANS/OCTOCORALS; BRYOZOANS/MOSS ANIMALS; ISOPODS; ARTHROPODS; CRUSTACEANS; AMPHIPODS; EUPHAUSIIDS (KRILL); BARNACLES; BRITTLE/BASKET STARS; ECHINODERMS; SEA URCHINS; BIVALVES; MOLLUSKS; CHITONS; GASTROPODS; CEPHALOPODS; SPONGES; RIBBON WORMS; ACORN WORMS; FLATWORMS/FLUKES/TAPEWORMS; FISH; ANIMALS/VERTEBRATES; BIOTURBATION; MARINE SEDIMENTS; IMAGES; BENTHIC TAXA; DEEP TOWED CAMERA; R/V NBP > R/V Nathaniel B. Palmer; SHIPS; AMD/AU; AMD; CEOS; GEOGRAPHIC REGION > POLAR; OCEAN > SOUTHERN OCEAN; CONTINENT > ANTARCTICA; Sabrina Coast; Southern Ocean; Yoyo; Antarc*; Antarctica
• Online Access: https://researchdata.ands.org.au/characterisation-seafloor-imagery-continental-shelf/968380; https://data.aad.gov.au/metadata/records/AAS_4320_NBP14-02_seafloor_imagery_data; https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4320_NBP14-02_seafloor_imagery_data; http://data.aad.gov.au/eds/4507/download; https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS_4320

Location information is based on the ship position, and interpolated along the track for the images based on start and end latitude and longitude and ship's speed. Positions are not corrected for layback between the vessel and the towed body. A total of 701 still images were analysed from 10 transects on the Sabrina Coast continental shelf. Imagery was collected from the RVIB Nathaniel B Palmer (NBP 14-02, 29 January - 16 March 2014) across a greater than 3000 km2 area. A 'yoyo' camera, with downward facing digital still and video cameras mounted within a tubular steel frame, was deployed on a coaxial cable to image the seafloor. The Ocean Imaging Systems DSC 10000 digital still camera (10.2 megapixel, 20 mm, Nikon D-80 camera) was contained within titanium housing. Camera settings were: F-8, focus 1.9 m, ASA-400. An Ocean Imaging Systems 3831 Strobe (200 W-S) was positioned 1m from the camera at an angle of 26 degrees from vertical. A Model 494 bottom contact switch triggered the camera and strobe at 2.5m above the sea floor, imaging ~ 4.8m2 of sea floor. Parallel laser beams (10 cm separation) provided a reference scale for the images. Transects were conducted at a ship's speed of ~1 knot. Still images were characterised for main taxonomic groups and sediment properties based on the CATAMI scheme of Althaus et al. 2015. Characterisation of seafloor habitats and taxa on the Sabrina Coast continental shelf.