Distribution and biomass of Antarctic krill (Euphausia superba) in the eastern sector of the CCAMLR Division 58.4.2 (55°E to 80°E), Antarctica, RV Investigator voyage IN2021_V01

This dataset was collected during the 2021 TEMPO voyage in the East Antarctic sector of the Southern Ocean as part of the Marine National Facility RV Investigator research voyage IN2021_V01. The voyage took place from Hobart (TAS) to Hobart between 29 January and 24 March 2021 (AEST) under the TEMPO (Trends in Euphausiids off Mawson, Predators, and Oceanography) program. Acoustic data collected along transects between 55°E and 80°E were analysed using CCAMLR standard protocols (SC-CAMLR, 2000) to identify Antarctic krill (Euphausia superba) echoes and estimate krill areal biomass density.

Observations were obtained using a calibrated EK80 scientific echosounder operating continuously at 120 kHz in cold-water conditions. Krill biomass estimates were complemented by biological sampling using a Rectangular Midwater Trawl (RMT 1+8), providing measurements of krill total length and wet mass.

The dataset describes the spatial distribution and biomass density of Antarctic krill across the eastern sector of CCAMLR Division 58.4.2. Supporting data are provided in CSV format and are organised by instrument type, enabling integration of acoustic and net sampling observations for further analysis.

Identification info

Date

Credit

So Kawaguchi, Australian Antarctic Division

These data were collected on the Marine National Facility (MNF) RV Investigator voyage IN2024_V01

Data are made available under a Creative Commons Attribution 4.0 International Licence, please see link. Data are supplied 'as is' without any warranty or guarantee except as required by law to be given to you. The data may not be free of error, comprehensive, current or appropriate for your particular purpose. You accept all risk and responsibility for their use. ATTRIBUTION STATEMENT: "We acknowledge the use of the CSIRO Marine National Facility ( https://ror.org/01mae9353) in undertaking this research. The dataset [Insert-dataset-name-here] downloaded on [Insert-DD-Mmm-YYYY-here] was collected on voyage [Insert-voyage-name-here] by the Marine National Facility." Acknowledgment and citations should be in all forms of publication including presentations (where the acknowledgement should be on the closing slide), journals, books, reports and related research outputs.

Status: Completed

Point of contact

Role	Organisation	Electronic mail address
Custodian	So Kawaguchi (Australian Antarctic Division)	so.kawaguchi@aad.gov.au
Point of contact	CSIRO NCMI - Information & Data Centre	data-requests-hf@csiro.au