Gentoo Penguin Winter Foraging Activity and Food Demand

Archival temperature tag data from gentoo penguins in the South Shetland Islands measures winter foraging trip frequency, timing, and duration from 2005 to 2008. The dataset provides estimates of minimum daily food requirements, which averaged 0.70 ± 0.12 kg day-1 and exhibited a seasonal cycle. Extrapolated regional food demand was equivalent to roughly 33% of the annual commercial krill catch in the area over the past decade.

Use Cases

• Modeling seasonal foraging effort based on trip duration and day length correlations.
• Assessing competition between penguin populations and local krill fisheries using estimated food demand.
• Studying post-breeding and pre-breeding behavioral shifts in penguin activity patterns.
• Monitoring population-level resource requirements to inform Antarctic ecosystem management.

Strengths

• Provides rare estimates of daily activity and food demand for a polar seabird during winter.
• Contains multi-year time-series data from 2005-04-03 to 2008-09-30.
• Data supports analysis of a specific ecological interaction, quantifying that gentoo winter food demand was equivalent to roughly 33% of annual regional krill catches.

Limitations

• Column names and data structure are unknown across all platform entries.
• Conflicting 'last updated' dates (2008-09-30 and 2026-03-14) create uncertainty about metadata freshness.
• Exact row count, file size, and specific license terms are not provided.

Provenance

Source

NOAA_NCEI (NCEI Accession 0162405)

Collection Method

Archival temperature tags affixed to gentoo penguins (Pygoscelis papua) from two colonies.

Time Range

2005-04-03 to 2008-09-30

Freshness

2026-03-14 23:05:48.166191

Geography

South Shetland Islands, Antarctic