Characterisation of seafloor imagery from the Sabrina Coast continental shelf

• Other Authors: POST, ALIX (hasPrincipalInvestigator), POST, ALIX (processor), Australian Antarctic Data Centre (publisher)
• Format: Dataset
• Language: unknown
• Published: Australian Antarctic Data Centre
• 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; GEOGRAPHIC REGION > POLAR; OCEAN > SOUTHERN OCEAN; CONTINENT > ANTARCTICA; Southern Ocean; Sabrina Coast; Yoyo; Antarc*; Antarctica
• Online Access: https://researchdata.ands.org.au/characterisation-seafloor-imagery-continental-shelf/967525; https://doi.org/10.4225/15/59c1e3535d6d7; https://data.aad.gov.au/metadata/records/AAS_4320_NBP14-02_seafloor_imagery_data; http://nla.gov.au/nla.party-617536

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.