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Two scales of distribution and biomass of Antarctic krill (Euphausia superba) in the eastern sector of the CCAMLR Division 58.4.2 (55°E to 80°E)

Fisheries management

This study provides the first comprehensive krill biomass assessment for the eastern sector of CCAMLR Division 58.4.2 since 2006. The research addresses two critical objectives: updating large-scale biomass estimates to inform fisheries management, and evaluating whether smaller-scale surveys can reliably represent broader regional patterns. The findings confirm that day-time acoustic surveys are more reliable due to diel vertical migration patterns, and demonstrate that strategically designed small-scale surveys can serve as cost-effective monitoring tools between expensive large-scale surveys. This is particularly important given renewed commercial interest in East Antarctic krill fishing and the need for regular monitoring in a changing Antarctic environment. The lower biomass density compared to 2006 (though within expected variation) underscores the importance of continued assessment. The study recommends using day-time data only for biomass estimation and suggests that a series of small-scale surveys extrapolated across latitudinal bands could provide a viable approach for "filling gaps" in monitoring between major survey efforts.

Two scales of distribution and biomass of Antarctic krill (Euphausia superba) in the eastern sector of the CCAMLR Division 58.4.2 (55°E to 80°E)

Featured Publications

A new dynamic distribution model for Antarctic krill reveals interactions with their environment, predators, and the commercial fishery in the south Scotia Sea region

Fisheries management

A new dynamic distribution model for Antarctic krill reveals interactions with their environment, predators, and the commercial fishery in the south Scotia Sea region

Seasonal dynamics of an Antarctic krill resource hot spot in the Bransfield Strait, Antarctica

Fisheries management

Seasonal dynamics of an Antarctic krill resource hot spot in the Bransfield Strait, Antarctica

Abundance and Distribution of Fin and Humpback Whales at the South Orkney Islands 2011–2025

Fisheries management

Abundance and Distribution of Fin and Humpback Whales at the South Orkney Islands 2011–2025

The Enormous Repetitive Antarctic Krill Genome

Antarctic ecosystem

The Enormous Repetitive Antarctic Krill Genome

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Adjusting the Management of the Antarctic Krill Fishery to Meet the Challenges of the 21st Century

Fisheries management

Antarctic ecosystem

Krill (Euphausia superba)

Proceedings of the National Academy of Sciences (PNAS), 2025

A new dynamic distribution model for Antarctic krill reveals interactions with their environment, predators, and the commercial fishery in the south Scotia Sea region

Fisheries management

Antarctic ecosystem

Krill (Euphausia superba)

Limnology and Oceanography, 2025, doi: 10.1002/lno.12809, 2025

Abundance and Distribution of Fin and Humpback Whales at the South Orkney Islands 2011–2025

Fisheries management

Antarctic ecosystem

Krill (Euphausia superba)

ICES Journal of Marine Science, 2025