Antarctic Krill Distribution and Biomass Density in East Antarctica, 2021

Acoustic and net sampling data from the 2021 TEMPO voyage between 55°E and 80°E in the Southern Ocean. The dataset was collected by CSIRO aboard the RV Investigator from 29 January to 24 March 2021, using a calibrated EK80 echosounder and Rectangular Midwater Trawl. It provides estimates of Antarctic krill (Euphausia superba) areal biomass density, analyzed using CCAMLR standard protocols.

Use Cases

• Modeling krill population distribution based on acoustic survey transects.
• Estimating biomass density for ecosystem management based on CCAMLR-standardized analysis.
• Integrating acoustic observations with biological sampling data for species validation.
• Studying spatial patterns of Antarctic krill in the CCAMLR Division 58.4.2 region.

Strengths

• Data collected during a dedicated research voyage from 29 January to 24 March 2021.
• Analysis follows the established CCAMLR standard protocols (SC-CAMLR, 2000).
• Combines calibrated acoustic data with biological net sampling for validation.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic and temporal bias inherent to a single 2021 voyage.

Provenance

Source

CSIRO Marlin Data Catalogue

Collection Method

Acoustic data from an EK80 echosounder and biological samples from a Rectangular Midwater Trawl (RMT 1+8), analyzed using CCAMLR protocols.

Time Range

29 January 2021 to 24 March 2021

Freshness

Last updated 2026-05-12 01:18:11.816426; freshness should be verified.

Geography

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