Antarctic Krill Distribution and Biomass Density from the 2021 TEMPO Voyage

January to March 2021 data collected during the RV Investigator voyage IN2021_V01 under the TEMPO program. The dataset describes the spatial distribution and biomass density of Antarctic krill (Euphausia superba) in the eastern sector of CCAMLR Division 58.4.2 between 55°E and 80°E. It was produced by the Australian Ocean Data Network using calibrated echosounder data and biological sampling.

Use Cases

• Model krill population dynamics based on biomass density estimates.
• Map the spatial distribution of Antarctic krill across the survey area.
• Integrate acoustic and net sampling data for biomass validation.
• Analyze krill size and mass relationships from trawl measurements.

Strengths

• Data collected using CCAMLR standard protocols for consistent analysis.
• Biomass estimates are complemented by direct biological sampling with an RMT 1+8 trawl.
• Acoustic data was collected with a calibrated EK80 scientific echosounder at 120 kHz.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Australian Ocean Data Network

Collection Method

Acoustic data analysis and biological sampling via Rectangular Midwater Trawl (RMT 1+8) during a research voyage.

Time Range

29 January to 24 March 2021 (AEST)

Freshness

Last updated 2026-06-23 04:15:40.326618; freshness should be verified.

Geography

Eastern sector of CCAMLR Division 58.4.2 (55°E to 80°E), Southern Ocean, Antarctica.