Antarctic Krill Population Model Data from the Antarctic Peninsula, 1992-2011

An integrated age-structured model investigated Antarctic krill (Euphausia superba) population dynamics near the Antarctic Peninsula. The data combines two biomass indices from trawl-net and hydroacoustic surveys with length-compositions, collected by the U.S. Antarctic Marine Living Resources Program from 1992 to 2011. Sixteen model configurations were examined using different data combinations and selectivity modeling options.

Use Cases

• Calibrating age-structured population models based on the described biomass and length-composition data.
• Comparing the performance of logistic versus double-logistic selectivity functions in fishery models.
• Analyzing temporal trends in krill biomass near the Antarctic Peninsula based on the 1992-2011 survey time series.
• Investigating the impact of time-constant versus annually varying selectivity assumptions on model outputs.

Strengths

• Data spans a 20-year time series from 1992 to 2011.
• Combines two independent biomass measurement methods (trawl-net and hydroacoustic).
• Sixteen distinct model configurations provide a basis for methodological comparison.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is provided as a PDF, which may require extraction to a structured format for analysis.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Surveys conducted by the U.S. Antarctic Marine Living Resources Program.

Time Range

1992-2011

Freshness

Last updated 2026-03-14 23:06:49.293277; freshness should be verified.

Geography

Antarctic Peninsula, South Shetland Islands