Macquarie Island Vertebrate Pest Diets and Penguin Colony Census

Metadata and research summaries from ASAC Project 101 document vertebrate pest ecology and wildlife populations on Macquarie Island. Studies include monthly stomach content analysis of house mice and ship rats over 12 months, duck observations from 1985-1986, and a census of 57 Royal Penguin colonies. The data was compiled by the Australian Antarctic Data Centre and last updated in 1999.

Use Cases

• Analyze seasonal diet variations of Mus musculus and Rattus rattus using monthly stomach content data.
• Estimate population changes in Royal Penguin colonies using baseline counts of 848,719 breeding pairs across 57 locations.
• Study duck habitat use and hybridization by examining feeding rates and brood records from Square Lake and Duck Lagoon.
• Assess the impact of introduced rabbits on nesting cover by correlating habitat degradation data with duck observation records.

Strengths

• Monthly diet data collected over a full 12-month cycle for two rodent species.
• Penguin population estimate derived from two estimation methods with a defined margin of error (plus or minus 10.5%).
• Includes historical comparison data for penguin colonies from the 1912-13 Australasian Antarctic Expedition.

Limitations

• Sample data and specific column details are unavailable, limiting direct analysis.
• Data is temporally stale, with the last update recorded in 1999.
• Geographic scope is limited to a single, isolated subantarctic island.

Provenance

Source

AU_AADC (Australian Antarctic Data Centre) for ASAC Project 101.

Collection Method

Field research including stomach content analysis, wildlife observation, and colony census.

Time Range

Observations from 1912-13, 1985-1986, and 12 months of rodent diet study (specific years not provided).

Freshness

1999-04-18

Geography

Macquarie Island, a subantarctic island.