Echosounder data to assess patterns in krill density - voyage of the RV Tangaroa, 2015

• Other Authors: AADC (originator), AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: biota; oceans; EUPHAUSIIDS (KRILL); EARTH SCIENCE; BIOLOGICAL CLASSIFICATION; ANIMALS/INVERTEBRATES; ARTHROPODS; CRUSTACEANS; BALEEN WHALES; ANIMALS/VERTEBRATES; MAMMALS; CETACEANS; ECHO SOUNDERS; R/V TANGAROA; AMD; AMD/AU; CEOS; OCEAN > SOUTHERN OCEAN > ROSS SEA; SOUTHERN OCEAN; GEOGRAPHIC REGION > POLAR; Antarctic; Horten; New Zealand; Norway; Ross Sea; Southern Ocean; Antarc*; baleen whales
• Online Access: https://researchdata.edu.au/echosounder-assess-patterns-tangaroa-2015/1443889; https://data.aad.gov.au/metadata/records/AAS_4102_KrillAcoustics_2015; https://data.aad.gov.au/eds/5048/download; https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS_4102; https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4102_KrillAcoustics_2015

The quality of these data are good, and there were no problems with the dataset. Echosounder data were collected on a multidisciplinary research voyage conducted from the RV Tangaroa, operated by New Zealand’s National Institute of Water and Atmospheric Research Limited (NIWA). The voyage lasted 42 days, departing from Wellington, New Zealand on January 29th , 2015 and returning to the same port on 11th March 2015. Active acoustic data were obtained continuously using a calibrated scientific echosounder (Simrad EK60, Horten, Norway). The echosounder operated at 38 and 120 kHz for the duration of the voyage with a pulse duration of 1.024 ms, a pulse repetition rate of one ping per second and a 7° beam width. The echosounder data here are a subset of that collected throughout the voyage and include only data from south of 65°S. This subset of data focuses on research questions pertaining to Antarctic blue whales and krill. Echosounder data were collected to investigate krill in the vicinity of, and demonstrably far from vocalising Antarctic blue whales. See Miller et al. 2019 (Sci. Rep. 9:16487; https://doi.org/10.1038/s41598-019-52792-4) for a more detailed description of these research questions.